Permafrost Monthly Alerts (PMAs)

2016069272 Hodgkins, Suzanne B. (Florida State University, Department of Earth, Ocean, and Atmospheric Science, Tallahassee, FL); Tfaily, Malak M.; Podgorski, David C.; McCalley, Carmody K.; Saleska, Scott R.; Crill, Patrick M.; Rich, Virginia I.; Chanton, Jeffrey P. and Cooper, William T. Elemental composition and optical properties reveal changes in dissolved organic matter along a permafrost thaw chronosequence in a subarctic peatland: Geochimica et Cosmochimica Acta, 187, p. 123-140, illus. incl. 3 tables, 97 ref., August 15, 2016. Includes appendices.

The fate of carbon stored in permafrost-zone peatlands represents a significant uncertainty in global climate modeling. Given that the breakdown of dissolved organic matter (DOM) is often a major pathway for decomposition in peatlands, knowledge of DOM reactivity under different permafrost regimes is critical for determining future climate feedbacks. To explore the effects of permafrost thaw and resultant plant succession on DOM reactivity, we used a combination of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), UV/Vis absorbance, and excitation-emission matrix spectroscopy (EEMS) to examine the DOM elemental composition and optical properties of 27 pore water samples gathered from various sites along a permafrost thaw sequence in Stordalen Mire, a thawing subarctic peatland in northern Sweden. The presence of dense Sphagnum moss, a feature that is dominant in the intermediate thaw stages, appeared to be the main driver of variation in DOM elemental composition and optical properties at Stordalen. Specifically, DOM from sites with Sphagnum had greater aromaticity, higher average molecular weights, and greater O/C, consistent with a higher abundance of phenolic compounds that likely inhibit decomposition. These compounds are released by Sphagnum and may accumulate due to inhibition of phenol oxidase activity by the acidic pH at these sites. In contrast, sites without Sphagnum, specifically fully-thawed rich fens, had more saturated, more reduced compounds, which were high in N and S. Optical properties at rich fens indicated the presence of microbially-derived DOM, consistent with the higher decomposition rates previously measured at these sites. These results indicate that Sphagnum acts as an inhibitor of rapid decomposition and CH₄ release in thawing subarctic peatlands, consistent with lower rates of CO₂ and CH₄ production previously observed at these sites. However, this inhibitory effect may disappear if Sphagnum-dominated bogs transition to more waterlogged rich fens that contain very little to no living Sphagnum. Release of this inhibition allows for higher levels of microbial activity and potentially greater CH₄ release, as has been observed in these fen sites.

DOI: 10.1016/j.gca.2016.05.015

2016067302 Guo Donglin (Chinese Academy of Sciences, Institute of Atmospheric Physics, Beijing, China) and Wang Huijun. CMIP5 permafrost degradation projection; a comparison among different regions: Journal of Geophysical Research: Atmospheres, 121(9), p. 4499-4517, illus. incl. 4 tables, 54 ref., May 16, 2016.

The considerable impact of permafrost degradation on hydrology and water resources, ecosystems, human engineering facilities, and climate change requires us to carry out more in-depth studies, at finer spatial scales, to investigate the issue. In this study, regional differences of the future permafrost changes are explored with respect to the regions (high altitude and high latitude, and in four countries) based on the surface frost index (SFI) model and multimodel and multiscenario data from the fifth phase of the Coupled Model Intercomparison Project (CMIP5). Results show the following: (1) Compared with seven other sets of driving data, Climatic Research Unit air temperature combined with Climate Forecast System Reanalysis snow data (CRU_CFSR) yield a permafrost extent with the least absolute area bias and was thus used in the simulation. The SFI model, driven by CRU_CFSR data climatology plus multimodel mean anomalies, produces a present-day (1986-2005) permafrost area of 15.45 ´ 10⁶ km² decade^-1, which compares reasonably with observations of 15.24 ´ 10⁶ km² decade^-1. (2) The high-altitude (Tibetan Plateau) permafrost area shows a larger decreasing percentage trend than the high-latitude permafrost area. This indicates that, in terms of speed, high-altitude permafrost thaw is faster than high-latitude permafrost, mainly due to the larger percentage sensitivity to rising air temperature of the high-altitude permafrost compared to the high-latitude permafrost, which is likely related to their thermal conditions. (3) Permafrost in China shows the fastest thaw, which is reflected by the percentage trend in permafrost area, followed by the United States, Russia, and Canada. These discrepancies are mainly linked to different percentage sensitivities of permafrost areas in these four countries to air temperature change. (4) In terms of the ensemble mean, permafrost areas in all regions are projected to decrease by the period 2080-2099. Under representative concentration pathway (RCP)4.5, permafrost retreats toward the Arctic, and the thaw in every region mainly occurs at the southern edge of the permafrost area. Under RCP8.5, almost no permafrost is expected to remain in China, the United States, and the Tibetan Plateau. Permafrost in Russia will remain mainly in the western part of the east Siberian Mountains, and permafrost in Canada will retreat to the north of 65°N. Possible uncertainties in this study are primarily attributed to the climate model's coarse horizontal resolution. The results of the present study will be useful for understanding future permafrost degradation from the regional perspective. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved.

DOI: 10.1002/2015JD024108

2016070562 Kurylyk, Barret L. (University of Calgary, Department of Geoscience, Calgary, AB, Canada); Hayashi, Masaki; Quinton, William L.; McKenzie, Jeffrey M. and Voss, Clifford I. Influence of vertical and lateral heat transfer on permafrost thaw, peatland landscape transition, and groundwater flow: Water Resources Research, 52(2), p. 1286-1305, illus. incl. 2 tables, 95 ref., February 2016.

Recent climate change has reduced the spatial extent and thickness of permafrost in many discontinuous permafrost regions. Rapid permafrost thaw is producing distinct landscape changes in the Taiga Plains of the Northwest Territories, Canada. As permafrost bodies underlying forested peat plateaus shrink, the landscape slowly transitions into unforested wetlands. The expansion of wetlands has enhanced the hydrologic connectivity of many watersheds via new surface and near-surface flow paths, and increased streamflow has been observed. Furthermore, the decrease in forested peat plateaus results in a net loss of boreal forest and associated ecosystems. This study investigates fundamental processes that contribute to permafrost thaw by comparing observed and simulated thaw development and landscape transition of a peat plateau-wetland complex in the Northwest Territories, Canada from 1970 to 2012. Measured climate data are first used to drive surface energy balance simulations for the wetland and peat plateau. Near-surface soil temperatures simulated in the surface energy balance model are then applied as the upper boundary condition to a three-dimensional model of subsurface water flow and coupled energy transport with freeze-thaw. Simulation results demonstrate that lateral heat transfer, which is not considered in many permafrost models, can influence permafrost thaw rates. Furthermore, the simulations indicate that landscape evolution arising from permafrost thaw acts as a positive feedback mechanism that increases the energy absorbed at the land surface and produces additional permafrost thaw. The modeling results also demonstrate that flow rates in local groundwater flow systems may be enhanced by the degradation of isolated permafrost bodies. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved.

DOI: 10.1002/2015WR018057

2016068889 Minsley, Burke J. (U. S. Geological Survey, Denver, CO); Pastick, Neal J.; Wylie, Bruce K.; Brown, Dana R. N. and Kass, M. Andy. Evidence for nonuniform permafrost degradation after fire in boreal landscapes: Journal of Geophysical Research: Earth Surface, 121(2), p. 320-335, illus. incl. 2 tables, geol. sketch map, 55 ref., February 2016.

Fire can be a significant driver of permafrost change in boreal landscapes, altering the availability of soil carbon and nutrients that have important implications for future climate and ecological succession. However, not all landscapes are equally susceptible to fire-induced change. As fire frequency is expected to increase in the high latitudes, methods to understand the vulnerability and resilience of different landscapes to permafrost degradation are needed. We present a combination of multiscale remote sensing, geophysical, and field observations that reveal details of both near-surface (<1 m) and deeper (>1 m) impacts of fire on permafrost. Along 11 transects that span burned-unburned boundaries in different landscape settings within interior Alaska, subsurface electrical resistivity and nuclear magnetic resonance data indicate locations where permafrost appears to be resilient to disturbance from fire, areas where warm permafrost conditions exist that may be most vulnerable to future change, and also areas where permafrost has thawed. High-resolution geophysical data corroborate remote sensing interpretations of near-surface permafrost and also add new high-fidelity details of spatial heterogeneity that extend from the shallow subsurface to depths of about 10 m. Results show that postfire impacts on permafrost can be variable and depend on multiple factors such as fire severity, soil texture, soil moisture, and time since fire. Abstract Copyright (2016), . American Geophysical Union. All Rights Reserved.

DOI: 10.1002/2015JF003781

2016064718 Zhang Zhongqiong (Chinese Academy of Science, State Key Laboratory of Frozen Soil Engineering, Lanzhou, China); Wu Qingbai and Xun Xueyi. Radiation and energy balance characteristics of asphalt pavement in permafrost regions: Environmental Earth Sciences, 75(3), Article 221, illus. incl. 2 tables, 30 ref., February 2016.

Solar radiation and energy balance between the atmosphere and asphalt pavement directly affect the heat absorption of the pavement, resulting in a temperature increase and possible thawing of the permafrost beneath embankments in permafrost regions. The study area is located in the eastern side of the Qiangtang large continuous permafrost on the Qinghai-Tibet Plateau. By in situ field testing about radiation and energy transfer, the heat absorption of asphalt pavement in the experimental section of high-grade highway in the Beiluhe area was analyzed. The energy exchange between the atmosphere and asphalt pavement differs from the natural surface. Compared with natural surface, the asphalt pavement shows an increased radiation capacity of downward longwave radiation, upward longwave radiation, and downward shortwave radiation, as well as a reduced radiation capacity of upward shortwave radiation. These changes in radiation capacity substantiate the increase in the heat absorption of asphalt pavement. Overall, the net radiation amount of asphalt pavement is 6.45 % higher than that of a natural surface. Sensible heat and latent heat dominated the energy transportation. However, in contrast to that of the natural surface, the sensible heat flux of the asphalt pavement was reduced by 15.95 %, whereas the latent heat flux was reduced by 32.1 %. The increase in solar radiation energy absorption and the decrease in energy transfer caused the asphalt pavement to absorb more heat than the natural surface. This difference in energy balance was a driving force in the thermal effects of asphalt pavement. Analysis of heat sources of asphalt pavement will help to take appropriate engineering measures for the normal operation of road construction in cold regions. Copyright 2015 Springer-Verlag Berlin Heidelberg

DOI: 10.1007/s12665-015-4975-5

2016066652 Liu Yeyi (Chinese Academy of Sciences, Institute of Atmospheric Physics, Beijing, China) and Jiang Dabang. Mid-Holocene permafrost; results from CMIP5 simulations: Journal of Geophysical Research: Atmospheres, 121(1), p. 221-240, illus. incl. 2 tables, 74 ref., January 16, 2016.

Distribution of frozen ground and active layer thickness in the Northern Hemisphere during the mid-Holocene (MH) and differences with respect to the preindustrial (PI) were investigated here using the Coupled Model Intercomparison Project Phase 5 (CMIP5) models. Two typical diagnostic methods, respectively, based on soil temperature (T_s based; a direct method) and air temperature (T_a based; an indirect method) were employed to classify categories and extents of frozen ground. In relation to orbitally induced changes in climate and in turn freezing and thawing indices, the MH permafrost extent was 20.5% (1.8%) smaller than the PI, whereas seasonally frozen ground increased by 9.2% (0.8%) in the Northern Hemisphere according to the T_s-based (T_a-based) method. Active layer thickness became larger, but by ≤&eq; 1.0 m in most of permafrost areas during the MH. Intermodel disagreement remains within areas of permafrost boundary by both the T_s-based and T_a-based results, with the former demonstrating less agreement among the CMIP5 models because of larger variation in land model abilities to represent permafrost processes. However, both the methods were able to reproduce the MH relatively degenerated permafrost and increased active layer thickness (although with smaller magnitudes) as observed in data reconstruction. Disparity between simulation and reconstruction was mainly found in the seasonally frozen ground regions at low to middle latitudes, where the reconstruction suggested a reduction of seasonally frozen ground extent to the north, whereas the simulation demonstrated a slightly expansion to the south for the MH compared to the PI. Abstract Copyright (2015), . American Geophysical Union. All Rights Reserved.

DOI: 10.1002/2015JD023837

2016063511 Bockheim, J. G. (University of Wisconsin, Department of Soil Science, Madison, WI). Paleosols in the Transantarctic Mountains; indicators of environmental change: Solid Earth (SE, Gottingen), 4(2), p. 451-459, illus. incl. 4 tables, sketch map, 41 ref., 2013.

The Transantarctic Mountains (TAMs), a 3500 km long chain that subdivides East Antarctica from West Antarctica, are important for reconstructing the tectonic, glacial, and climatic history of Antarctica. With an ice-free area of 24 200 km² (50% of the total in Antarctica), the TAMs contain an unusually high proportion of paleosols, including relict and buried soils. The unconsolidated paleosols range from late Quaternary to Miocene in age, the semi-consolidated paleosols are of early Miocene to Oligocene age, and the consolidated paleosols are of Paleozoic age. Paleosols on unconsolidated deposits are emphasized in this study. Examples are given from the McMurdo Dry Valleys (78° S) and two outlet glaciers in the central and southern TAMS, including the Hatherton-Darwin Glacier region (80° S) and the Beardmore Glacier region (85°30' S). Relict soils constitute 73% of all of the soils examined; 10% of the soils featured burials. About 26% of the soils examined are from the last glaciation (< 117 ka) and have not undergone any apparent change in climate. As an example, paleosols comprise 65% of a mapped portion of central Wright Valley. Paleosols in the TAMs feature recycled ventifacts and buried glacial ice in excess of 8 Ma in age, and volcanic ash of Pliocene to Miocene age has buried some soils. Relict soils are more strongly developed than nearby modern soils and often are dry-frozen and feature sand-wedge casts when ice-cemented permafrost is present. The preservation of paleosols in the TAMs can be attributed to cold-based glaciers that are able to override landscapes while causing minimal disturbance.

URL: http://www.solid-earth.net/4/451/2013/se-4-451-2013.pdf

2016070907 Martin, Jean-Philippe (Université du Québec à Montréal, Institute of Environmental Sciences, Montreal, QC, Canada) and Germain, Daniel. Late-glacial and Holocene evolution as a driver of diversity and complexity of the northeastern North American alpine landscapes; a synthesis: Canadian Journal of Earth Sciences = Revue Canadienne des Sciences de la Terre, 53(5), p. 494-505 (French sum.), illus. incl. 3 tables, 91 ref., May 2016.

Mid-altitude, mid-latitude mountains are complex environments owing to their Pleistocene glacial heritage, the importance of geomorphic processes on the steep slopes, and the climatic conditions that are often close to periglacial. These factors, along with the fragmentation of the alpine habitats, enhance the topographic and floristic diversity of these environments in northeastern North America. Through case studies, this synthesis underlines the interactions between the geosphere (glacial, paraglacial, and periglacial processes), the atmosphere (climatic fluctuations), and the biosphere (vegetation establishment and evolution to the present day) that explain the low elevation of the northeastern North American alpine environment and that testify to its complexity. Vegetation established earlier in the southern ranges, following the same general trend as the Laurentian Ice Sheet recession. However, local factors such as ice retreat, response to global-scale climate changes, and paraglacial processes acted in synergy to increase the resilience and to influence the occurrence of alpine landscapes. The establishment of the latter environment can therefore be considered to be azonal. Finally, our findings highlight the lack of a conceptual framework, systemic studies, and multi-proxy reconstructions of alpine environments located at the limit of bioclimatic zones controlled by the equilibrium between biostatic and rhexistatic regimes.

DOI: 10.1139/cjes-2016-0004

2016066322 Bhusal, Jagat K. (SOHAM Nepal, Nepal) and Subedi, Bhim Prasad. Effect of climate change on suspended sediment load in the Himalayan Basin; a case study of Upper Kaligandaki River: Journal of Hydrology. New Zealand, 54(1), p. 1-10, illus. incl. 2 tables, sketch maps, 20 ref., 2015.

The effects of climate change on mountain hydrology are likely to have consequences for mountain people, particularly in terms of the water sources, vegetation, grazing land and other resources on which they are dependent. The Intergovernmental Panel on Climate Change (IPCC) has indicated that global warming is occurring relatively faster in recent decades, with the rate of temperature increase being greater in the high-altitude Himalaya than in lowland parts of Nepal (Shrestha et al., 1999). One effect of the temperature rise is that glaciers are retreating faster than previously in the Himalayan region (International Centre for Integrated Mountain Development (ICIMOD), 2009; IPCC, 2001; 2007). This paper examines changes in river flows and sediment loads in the Himalayan region using the Upper Kaligandaki River basin as a case study. River flow and suspended sediment concentration data were collected at two locations and were analysed for the period 2011 to 2012. The two variables were found to have a positive correlation. Using historic river flow data, long-term annual average suspended sediment loads were then estimated for the period 1975 to 2011. The result showed a trend of increasing sediment load in the Upper Kaligandaki River. The increasing trend is likely to continue and will have detrimental consequences on the current landuse and infrastructure.

URL: http://hydrologynz.co.nz/downloads/20160224-084354-JOHNZ_v54_1_BHUSAL.pdf

2016064739 Zhang Shuang (Northeastern University, School of Resources and Civil Engineering, Shenyang, China); Tang Chunan; Hu, Pan; Zhang Xiangdong and Zhang Zhecheng. Reversible and irreversible strain behavior of frozen aeolian soil under dynamic loading: Environmental Earth Sciences, 75(3), Article 245, illus. incl. 4 tables, 36 ref., February 2016.

Dynamic triaxial experiments were conducted to investigate the reversible and irreversible strain behavior of frozen aeolian soil. The frozen soil samples were subjected to the testing conditions of various temperatures, dynamic stress amplitudes, confining pressures and loading frequencies. The testing results indicate that both temperature and dynamic stress amplitude have significant influences on the resilient strain of frozen aeolian soil, and higher temperature and dynamic stress amplitude lead to larger cumulative plastic strain of frozen aeolian soil. Within the range of 0.02-0.1 MPa for the confining pressure, the resilient modulus increases with the increase of the confining pressure, while the cumulative plastic strain behaves adversely. The resilient modulus increases slightly with the increasing of the loading frequency, while the cumulative plastic strain somewhat decreases when the loading frequency reduces. Moreover, the functions of resilient modulus and cumulative plastic strain of frozen aeolian soil subgrade under dynamic loading were obtained. The results provide fundamental experimental data for predicting the permanent deformation of frozen aeolian soil subgrade and may shed light on further studies on the stability of highway subgrade in the cold regions. Copyright 2015 Springer-Verlag Berlin Heidelberg

DOI: 10.1007/s12665-015-5009-z

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2016070631 Braschi, Léa C. Chronostratigraphy of the Beaufort Formation, western Canadian Arctic Archipelago: 242 p., illus. incl. strat. cols., 2 tables, geol. sketch maps, 136 ref., Master's, 2015, Dalhousie University, Halifax, NS, Canada.

The Beaufort Formation (BF) braided river deposit contains exceptionally well-preserved logs, leaves, peat, insects, and vertebrate fossils that provide key evidence for Arctic environmental conditions during the Pliocene. Its wide geographic range along the western edge of the Canadian Arctic Archipelago suggests that its deposition and incision history were dictated by regional drivers of sediment transport (e.g., eustatic sea-level, permafrost thaw, ice sheet erosion, and dynamic topography). Hence, the BF provides clues about both environmental and depositional conditions, but available chronology in the last few decades has not been able to identify these as having occurred either 1) during the polar amplification of global warming (Pliocene Climate Optimum, 3.3-3.0 Ma) or 2) during the onset of northern hemisphere glaciations (Plio-Pleistocene transition, 2.6 Ma). We use cosmogenic nuclide burial dating at the southernmost BF locality (Ballast Brook on Banks Is.) to obtain: a) a minimum age of 2.72 (+0.34)/(-0.24) (1 s) Ma, and b) a maximum catchment-wide paleo-erosion rate of 49-86±2 cm/ka. The description of a previously unreported glaciofluvial gravel (which occurs at the same stratigraphic level as a potential ice-wedge pseudomorph and coincides with the base of a previously-mapped 3-km wide cut-and-fill channel) dates the earliest evidence of CAA glaciation, at 2.72 Ma. The presence of a large channel that runs parallel to the northern coast of Banks Is. also suggests that M'Clure Strait (and the Northwest Passage) was not open at that time. Furthermore, such a large (correlative with part of the 3-km Iperk Formation offshore) and quick (49-86±2 cm/ka) deposition event must have required the stripping of unconsolidated material (e.g. part of the Eureka Sound Group or Hassel and Isachsen Formations). The deposition system was likely a transport-limited system, and like the White Channel Gravels of the Yukon (Hidy et al. 2013), may have been controlled by changing climate in the Pliocene (e.g., melting permafrost, increased precipitation).

URL: http://hdl.handle.net/10222/56765

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2016070748 Günther, Frank and Morgenstern, Anne, editors. Eleventh international conference on Permafrost; exploring permafrost in a future Earth; book of abstracts: International Conference on Permafrost - Book of Abstracts, 11, 1293 p., illus., 2016. Meeting: Eleventh international conference on Permafrost; exploring permafrost in a future Earth, June 20-24, 2016, Potsdam, Germany. Individual abstracts within scope are cited separately.

The Eleventh International Conference on Permafrost was held in Potsdam, Germany from June 20 to 24, 2016. The theme of the conference was "Exploring Permafrost in a Future Earth". The conference program and the book of abstracts are published online at URL: http://icop2016.org. More than 800 abstracts are included in the book. There were 9 plenary sessions and 32 thematic sessions organized across the 5 days of the conference. These include: Periglacial Geomorphology ( 63), Antarctic Permafrost, Soils and Periglacial Environments (21), Ground Ice and Cryostratigraphy (10), Arctic and Antarctic Cryosols (21), Climate Change and the Permafrost Carbon Feedback (69), Towards Regional Assessments of Permafrost Atmosphere (31), Reconstructing Past Permafrost (28), Permafrost Mapping and Data (37), Results from GTN-P: TSP and CALM (50), Paleoenvironments in Permafrost Affected Areas (27), Microbial Ecology of Permafrost Ecosystems (16), Planetary Permafrost and Earth Analogues (11), The Yedoma Regions (22), Permafrost Hydrology and Groundwater Systems (55), The Importance of Lakes and Ponds in Permafrost Regions (30), Where, When, and Why the Arctic Become Wetter and Drier (10), Integrating Hydrology and Biochemistry (30), Submarine Permafrost, Arctic Gas Hydrates and Greenhouse Gases (14), Polar Coastlines in Transition (28), Permafrost-related Land Surface Subsidence and Frost Heave (16), Integrating Field and Remotely Sensed Measurements of Thaw-driven Landscape Changes (32), Ground-based and Airborne Geophysical Applications (27), Hazards and Risks Related to Changing Mountain, Lowland and Coastal Permafrost (17), New Frontiers in Mountain Permafrost Research (32), Changing Permafrost and its Impact Across High Asia (15), Frozen Ground Engineering (27), Infrastructure Stability in Permafrost Terrain (18), Permafrost Engineering in Mountainous Terrain (6), Permafrost Problems in Mineral, Oil, and Gas Exploration and Production (4), Frozen Ground Properties, Field and Laboratory Testing (27), Permafrost History and Culture (20), and Permafrost Education and Outreach (13). (mte)

2016069409 Supper, Robert (Geological Survey of Austria, Vienna, Austria); Ottowitz, David; Jochum, Birgit; Römer, Alexander; Pfeiler, Stefan; Kauer, Stefanie; Keuschnig, Markus and Ita, Anna. Geoelectrical monitoring of frozen ground and permafrost in alpine areas; field studies and considerations towards an improved measuring technology: in Special issue on Geoelectrical monitoring (Supper, Robert, editor; et al.), Near Surface Geophysics, 12(1), p. 93-115, 82 ref., February 2014. Meeting: 1st international workshop on Geoelectrical monitoring, Nov. 30-Dec. 2, 2011, Vienna, Austria.

DOI: 10.3997/1873-0604.2013057

2016066679 Blok, Daan (University of Copenhagen, Department of Geosciences and Nature Management, Center For Permafrost (CENPERM), Copenhagen, Denmark); Faucherre, Samuel; Banyasz, I.; Michelsen, Anders and Elberling, B. Legacy effects of warming on permafrost carbon release [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-04, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064477 Bröder, Lisa (Stockholm University, Analytical Chemistry and Environmental Sciences, Stockholm, Sweden); Tesi, Tommaso; Bruchert, Volker; Dudarev, O.; Semiletov, I. P. and Gustafsson, Orjan. Fate of permafrost-released organic matter in the Laptev Sea; what is its lateral transport time along the transect from the Lena Delta area to the deep sea of the Arctic interior? [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33F-06, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064470 Cao, B. (Lanzhou University, College of Earth and Environmental Sciences, Lanzhou, China); Zhang, T.; Zhang, X.; Peng, X.; Wang, K.; Guo, H.; Zheng, L.; Wang, Q.; Wan, X.; Mu, C.; Wu, J.; Jin, H. and He, R. Permafrost conditions over Heihe River Basin in Qilian Mountains of western China [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33E-0881, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064414 Chipman, M. L. (University of Illinois at Urbana Champaign, Urbana, IL); Reents, C.; Greenberg, J. A. and Hu, F. Impact of climate and fires on abrupt permafrost thaw in Alaskan tundra [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B34B-05, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064516 Chuvilin, E. M. (Lomonosov Moscow State University, Moscow, Russian Federation). Stability of intra-permafrost hydrates in the Arctic shelf; results of experimental work performed in the East Siberian Arctic Shelf [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0786, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066680 Cooper, M. D. A. (University of Exeter, College of Life and Environmental Sciences, Exeter, United Kingdom) and Estop-Aragones, C. Aerobic conditions are required for rapid carbon losses following permafrost thaw [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-05, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064411 Douglas, T. A. (Cold Regions Research and Engineering Laboratory Alaska, Fort Wainwright, AK). Strong seasonality of biogeochemical characteristics and source regions in permafrost watersheds [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B33G-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066686 Egan, J. E. (Dalhousie University, Earth Sciences, Halifax, NS, Canada); Natali, S.; Alexander, H. D.; Loranty, M. M.; Spawn, S. and Risk, D. A. Long-term impacts of fire on permafrost vulnerability and C loss in Siberian larch forests [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-03, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064450 Gaedeke, A. (University of Alaska Fairbanks, Fairbanks, AK); Liljedahl, A. K.; Gatesman, T.; Campbell, S. W.; Hock, R. and Oneel, S. Long-term linkages between glaciers, permafrost and hydrology at two glacierized watersheds in Alaska [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C32C-02, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064505 Goncharov, I. V. (Tomsk Polytechnic University, Tomsk, Russian Federation); Panova, E.; Grinko, A.; Dudarev, O. and Semiletov, I. P. Concerning the petroleum hydrocarbons migration in the permafrost zone [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0772, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066724 Grosse, G. (Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany); Walter Anthony, K. M.; Regmi, P.; Nitze, Ingmar and Schneider von Deimling, T. Lakes in northern permafrost regions and feedbacks with the methane cycle [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B44B-04, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064476 Guo, L. (University of Wisconsin-Milwaukee, Milwaukee, WI); Gao, L.; Zhou, Z. and Reyes, A. V. Characterization of soil-derived dissolved organic matter from permafrost in northern Alaska [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33F-05, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064506 Gustafsson, Orjan (Stockholm University, Stockholm, Sweden). The cryosphere-carbon on top of the Earth (CC-top) program; decreasing uncertainties of thawing permafrost and collapsing methane hydrates in the arctic [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0773, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066685 Hilton, R. G. (University of Durham, Durham, United Kingdom); Galy, V.; Gaillardet, J.; Dellinger, M.; Bryant, C.; O'Regan, M.; Gröcke, D. R.; Coxall, H.; Bouchez, J. and Calmels, D. Erosion of organic carbon from permafrost zones in the Arctic as a geological carbon dioxide sink [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-02, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066689 Jafarov, E. E. (University of Colorado, National Snow and Ice Data Center, Boulder, CO) and Schaefer, K. M. Temperature increase due to the permafrost carbon feedback [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-06, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064415 Jones, M. (U. S. Geological Survey, Reston, VA); Harden, J. W.; O'Donnell, J. A. and Manies, K. The long-term perspective on the carbon balance of permafrost peatlands in the Holocene; implications for modern permafrost thaw [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B34B-06, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066676 Knoblauch, C. (University of Hamburg, Hamburg, Germany); Beer, C. and Pfeiffer, E. M. Mobilization of stable organic carbon in thawing permafrost by fresh organic matter from recent vegetation [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-01, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064500 Koshurnikov, A. (Lomonosov Moscow State University, Moscow, Russian Federation); Gunar, A.; Tumskoy, V. E.; Shakhova, N. E.; Semiletov, I. P. and Valuyskiy, S. First application of time-domain electromagnetic technology (TEM) for permafrost mapping on the Arctic shelf [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0767, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066691 Koven, C. (Lawrence Berkeley National Laboratory, Berkeley, CA); Schuur, Edward; Schaedel, Christina; Bohn, Theodore J.; Burke, Eleanor; Chen, G.; Chen, X.; Ciais, Philippe; Grosse, G.; Harden, J. W.; Hayes, Daniel J.; Hugelius, Gustaf; Jafarov, E. E.; Krinner, G.; Kuhry, Peter; Lawrence, D. M.; MacDougall, Andrew; Marchenko, S. S.; McGuire, A. D.; Natali, S.; Nicolsky, D.; Olefeldt, D.; Peng, S.; Romanovsky, V. E.; Schaefer, Kevin M.; Strauss, J.; Treat, C. C. and Turetsky, M. R. A simplified, data-constrained approach to estimate the permafrost carbon-climate feedback; the PCN Incubation-Panarctic Thermal (PInc-PanTher) scaling approach [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064498 Lawrence, D. M. (National Center for Atmospheric Research, Boulder, CO); Koven, C.; Swenson, S. C.; Riley, W. J. and Slater, A. G. Modeling the soil moisture response to permafrost thaw and implications for the permafrost-carbon feedback [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C42B-03, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066719 Mauritz, Marguerite (Northern Arizona University, Flagstaff, AZ); Pegoraro, E.; Salmon, V. G.; Natali, S. and Schuur, Edward. Seasonal variation of ecosystem respiration delta ¹³C in response to experimental permafrost thaw and vegetation removal in moist acidic tundra [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43M-05, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066690 McGuire, A. D. (University of Alaska Fairbanks, Fairbanks, AK); Lawrence, D. M.; Burke, E.; Chen, G.; Jafarov, E. E.; Koven, C.; MacDougall, A. H.; Nicolsky, D.; Peng, S. and Rinke, A. The temporal evolution of changes in carbon storage in the northern permafrost region simulated by carbon cycle models between 2010 and 2300; implications for atmospheric carbon dynamics [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-07, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066760 Minsley, B. J. (U. S. Geological Survey, Denver, CO); Pastick, N. J.; Wylie, B. K.; Brown, D. N. and Kass, A. Geophysical evidence for non-uniform permafrost degradation after fire across boreal landscapes [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B51G-0503, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064507 Niessen, F. (Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Bremerhaven, Bremerhaven, Germany); Matthiessen, J. J.; Stein, R. H.; Jensen, L.; Jokat, W. and Nam, S. I. Landforms indicative of former glaciations and permafrost along continental margin of the Chukchi and East Siberian seas [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0774, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064416 Olefeldt, D. (University of Alberta, Edmonton, AB, Canada); Pelletier, N.; Talbot, J.; Blodau, C. and Turetsky, M. R. Peatland carbon cycling and the implications of permafrost thaw; a chronosequence study [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B34B-07, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064436 Perryman, C. R. (Earlham College, Richmond, IN); Kashi, Natalie N.; Malhotra, Avni; McCalley, C. K. and Varner, Ruth K. Permafrost thaw induces methane oxidation in transitional thaw stages in a subarctic peatland [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0442, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066716 Raz Yaseef, N. (Lawrence Berkeley National Laboratory, Berkeley, CA); Torn, M. S.; Billesbach, D. P.; Wu, Y.; Kneafsey, T. J.; Romanovsky, V. E.; Cook, D. R.; Commane, R.; Henderson, J.; Miller, C. E. and Wullschleger, S. D. Multi-scale evidence of large CO₂ and CH₄ emissions from permafrost during spring thaw in northern Alaska [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43M-02, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064483 Rodehacke, C. B. (Danish Meteorological Institute, Copenhagen, Denmark); Stendel, M.; Marchenko, S. S.; Christensen, J. H.; Romanovsky, V. E. and Nicolsky, D. Subsea permafrost climate modeling; challenges and first results [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C34A-06, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066687 Romanovsky, V. E. (University of Alaska Fairbanks, Fairbanks, AK); Nicolsky, D.; Marchenko, S. S.; Cable, W. and Panda, S. K. Merging field measurements and high resolution modeling to predict possible societal impacts of permafrost degradation [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-04, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066681 Salmon, V. G. (University of Florida, Biology Department, Ft. Walton Beach, FL); Schaedel, Christina; Mack, Michelle C. and Schuur, Edward. Carbon and nitrogen cycling in a permafrost soil profile [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-06, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064520 Semiletov, I. P. (Russian Academy of Sciences, Far Eastern Branch, Pacific Oceanological Institute, Vladivostok, Russian Federation); Pipko, Irina; Gustafsson, Orjan; Anderson, L. G.; Sergienko, V.; Pugach, S.; Dudarev, O.; Charkin, A. N.; Gukov, A.; Broder, Lisa; Andersson, A. and Shakhova, N. E. Extreme natural acidification in the East Siberian Arctic Shelf; effects of permafrost thawing and seawater freshening [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0790, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064519 Serov, P. (University of Tromso, CAGE, Tromso, Norway); Portnov, A. and Mienert, Jurgen. Methane release and pingo-like feature across the South Kara Sea shelf, an area of thawing offshore permafrost [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0789, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064472 Shakhova, N. E. (University of Alaska Fairbanks, Fairbanks, AK). Methane release from the East Siberian Arctic Shelf; the role of subsea permafrost and other controlling factors as inferred from decadal observational and modeling efforts [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33F-01, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066688 Shiklomanov, N. I. (George Washington University, Washington, DC); Nelson, F. E.; Streletskiy, D. A.; Klene, A. E. and Li, Z. CALM at 21; results of long-term monitoring of the active layer/upper permafrost system [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-05, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064417 Striegl, R. G. (U. S. Geological Survey, Boulder, CO); Walvoord, M. A.; Minsley, B. J.; Drake, T.; Aiken, G. and Wickland, K. Mobilization of aquatic carbon from permafrost; tracking the ancient carbon signal [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B34B-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064504 Tesi, Tommaso (Stockholm University, Stockholm, Sweden); Vonk, Jorien; Hugelius, Gustaf; Kuhry, Peter and Gustafsson, Orjan. Distinguishing between old and modern permafrost sources with compound-specific deuterium analysis [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0771, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066714 Treat, C. C. (University of Alaska Fairbanks, Fairbanks, AK); Harden, J. W.; Koven, C. and Kane, E. S. Cryoturbation, peat accumulation, and gleying; do these processes affect soil carbon distribution within permafrost profiles? [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43L-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066683 Treat, C. C. (University of Alaska Fairbanks, Fairbanks, AK); Jones, M.; Frolking, S. E. and Alder, J. R. Here today, gone tomorrow? Using contrasting peatland histories to determine fate of permafrost carbon with future climate change and permafrost thaw [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066718 Turetsky, M. R. (University of Guelph, Guelph, ON, Canada); McGuire, A. D. and Olefeldt, D. Assessing the contributions of thermokarst and thermal erosion in permafrost feedbacks to climate [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43M-04, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064410 Varner, Ruth K. (University of New Hampshire, Institute for the Study of Earth, Oceans, and Space (EOS), Durham, NH); Crill, Patrick M.; Wik, Martin; McCalley, C. K.; DelGreco, J. L.; Garnello, A.; Saleska, S. R.; Torbick, N.; Burke, S. A.; Persson, Andreas; Johnson, Joel E.; Hines, Mark E.; Li, Changsheng; Palace, Michael W. and Herrick, C. Using remote sensing and field based measurements to understand short term changes in a permafrost landscape [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B33G-04, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064523 Walker, S. A. (Dalhousie University, Halifax, NS, Canada); Wallace, D.; Oldham, Carolyn and Waite, Anya. Predicting time and spatial scales for the degradation of dissolved organic carbon (DOC) in five large Arctic rivers; the fate of permafrost under a warming climate [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0795, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064469 Wang, K. (Lanzhou University, College of Earth and Environment Sciences, Lanzhou, China) and Zhang, T. Changes and variability of permafrost temperatures across Siberia from 1961 through 2013 [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33E-0879, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066762 Westermann, S. (University of Oslo, Oslo, Norway); Langer, M.; Ostby, Torbjorn; Peter, M.; Boike, J.; Gisnas, K.; Schuler, T. and Etzelmuller, B. Mapping the thermal state of permafrost through modeling and remote sensing [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B51G-0507, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064502 Wetterich, S. (Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany); Overduin, P. P.; Günther, F.; Liebner, S.; Knoblauch, C.; Grigoriev, M.; Schirrmeister, L. and Hubberten, H. W. Near-shore submarine permafrost of the central Laptev Sea, East Siberia [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0769, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066678 Yang, Z. (Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, TN); Wullschleger, S. D.; Liang, L.; Graham, D. E. and Gu, B. Susceptibility of permafrost soil organic carbon under warming climate [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-03, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064471 Zhang, W. (Sichuan University, Department of Hydrology, Chengdu, China); Yi, Y.; Jafarov, E. E.; Yang, K.; Kimball, J. S. and Song, K. Simulation of permafrost and seasonally frozen ground conditions and their response to recent climate warming in the Tibetan Plateau [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33E-0882, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064451 Zhao Lin (Chinese Academy of Sciences, Cold and Arid Regions Environmental and Engineering Research Institute, Lanzhou, China); Sheng Yu; Pang Qiangqiang; Zou Defu; Wang Zhiwei; Li Wangping; Wu Xiaodong; Yue Guangyang; Fang Hongbing and Zhao Yonghua. Map the permafrost and its affected soils and vegetation on the Tibetan Plateau [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C32C-03, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064196 Voss, Clifford I. (U. S. Geological Survey, Menlo Park, CA). Simple modeling of large aquifers, variable-density groundwater-flow, and permafrost interaction with groundwater [abstr.]: in Geological Society of America, 2015 annual meeting & exposition, Abstracts with Programs - Geological Society of America, 47(7), p. 657, 2015. Meeting: Geological Society of America, 2015 annual meeting & exposition, Nov. 1-4, 2015, Baltimore, MD.

2016068064 Bolsunovskaya, Y. A. (Tomsk Polytechnic University, Tomsk, Russian Federation) and Bolsunovskaya, L. M. Ecological risk analysis as a key factor in environmental safety system development in the Arctic region of the Russian Federation: in Scientific and technical challenges in the well drilling progress, IOP Conference Series. Earth and Environmental Science, 24(1), Paper no. 12003, illus. incl. 1 table, 11 ref., 2015. Meeting: The all-Russian scientific and technical conference "Scientific and technical challenges in the well drilling progress", Nov. 24-27, 2014, Tomsk, Russian Federation.

DOI: 10.1088/1755-1315/24/1/012003

2016069408 Kneisel, C. (University of Würzburg, Institute of Geography and Geology, Wuerzburg, Germany); Rödder, T. and Schwindt, D. Frozen ground dynamics resolved by multi-year and year-round electrical resistivity monitoring at three alpine sites in the Swiss Alps: in Special issue on Geoelectrical monitoring (Supper, Robert, editor; et al.), Near Surface Geophysics, 12(1), p. 117-132, 42 ref., February 2014. Meeting: 1st international workshop on Geoelectrical monitoring, Nov. 30-Dec. 2, 2011, Vienna, Austria.

DOI: 10.3997/1873-0604.2013067

2016065022 Briggs, Martin A. (U. S. Geological Survey, Branch of Geophysics, Storrs, CT); Walvoord, Michelle A.; Gardner, Philip M.; Ntarlagiannis, Dimitrios; Day-Lewis, Frederick D. and Lane, John W. Electromagnetic imaging of landscape-scale groundwater/surface water exchanges [abstr.]: in Geological Society of America, Northeastern Section, 51st annual meeting, Abstracts with Programs - Geological Society of America, 48(2), Abstract no. 16-9, 2016. Meeting: Geological Society of America, Northeastern Section, 51st annual meeting, March 21-23, 2016, Albany, NY.

DOI: 10.1130/abs/2016NE-272203

2016065235 Schaetzl, Randall (Michigan State University, Department of Geography, Environment, and Spatial Sciences, East Lansing, MI); Nyland, Kelsey; Ignatov, Anthony and Miller, Bradley A. Concurrent loess and saltating sand deposition on the Buckley Flats outwash plain of northwestern lower Michigan [abstr.]: in Geological Society of America, North-Central Section, 50th annual meeting, Abstracts with Programs - Geological Society of America, 48(5), Abstract no. 33-2, 2016. Meeting: Geological Society of America, North-Central Section, 50th annual meeting, April 18-19, 2016, Champaign, IL.

DOI: 10.1130/abs/2016NC-275362

2016066717 Balser, A. (Oak Ridge National Laboratory, Oak Ridge, TN) and Jones, J. Drivers and estimates of terrain suitability for active layer detachment slides and retrogressive thaw slumps in the Brooks Range and foothills of northwest Alaska, USA [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43M-03, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064452 Bliss, A. K. (University of Alaska Fairbanks, Geophysical Institute, Fairbanks, AK); Hock, R.; Wolken, G. J.; Whorton, Erin; Zhang, J.; Gusmeroli, A.; Braun, J. L.; Liljedahl, A. K. and Schulla, J. Changes to glacier runoff and downstream effects on the Susitna Basin, Alaska over the Twenty-First century [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C32C-06, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064522 Charkin, A. N. (National Research Tomsk Polytechnic University, Tomsk, Russian Federation); Dudarev, O.; Semiletov, I. P.; Shakhova, N. E.; Rutgers van der Loeff, M. and Salyuk, A. Tracing of submarine groundwater discharge in the Siberian Arctic coastal zone; the case study in the Buor-Khaya Bay, Laptev Sea [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0792, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064511 Chernykh, D. (National Research Tomsk Polytechnic University, Tomsk, Russian Federation); Shakhova, N. E.; Semiletov, I. P.; Yusupov, V.; Salomatin, A. and Leifer, I. Studying bubble-induced methane emissions from the East Siberian Arctic Shelf; the next step towards a quantitative assessment [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0778, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064503 Dudarev, O. (Russian Academy of Sciences, Far Eastern Branch, Pacific Oceanological Institute, Vladivostok, Russian Federation); Gustafsson, Orjan; Semiletov, I. P.; Jakobsson, Martin; Shakhova, N. E.; Tesi, Tommaso; Ruban, A. and Charkin, A. N. Specific features of sedimentology in the outer part of the East Siberian Arctic Shelf [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0770, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064513 Geibel, Marc C. (Bolin Centre for Climate Research, Stockholm, Sweden); Thornton, Brett F.; Prytherch, J.; Brooks, I. M.; Salisbury, D. J.; Tjernstrom, Michael K. H.; Semiletov, I. P.; Morth, C. Magnus; Humborg, Christoph and Crill, Patrick M. Characterization of sea-air methane fluxes around a seafloor gas seep in the central Laptev Sea [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0781, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066710 Goodrich, J. P. (San Diego State University, Global Change Research Group, San Diego, CA); Oechel, W. C.; Gioli, Beniamino; Murphy, P. and Zona, D. Unusually warm spring temperatures magnify annual CH₄ losses from Arctic ecosystems [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43J-07, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064525 Gustafsson, Orjan (Stockholm University, Stockholm, Sweden) and Salvado, Joan A. Contrasting composition of terrigenous organic matter in the DOC, POC and sedimentary organic carbon (SOC) pools on the outer East Siberian Arctic Shelf (ESAS) [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0798, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016068643 Hayashi, Masaki (University of Calgary, Calgary, AB, Canada); Mozil, Alexandra; Harrington, Jordan and Bentley, Laurence R. Groundwater storage and flow pathways in a rock glacier complex in the Canadian Rockies [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43F-03, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064439 Horruitiner, C. D. (University of Florida, Ft. Walton Beach, FL); Varner, Ruth K.; Palace, Michael W.; Johnson, Joel E.; Wik, Martin; Lundgren, D. J.; Sinclair, S. N.; Nicastro, A. J. D. and Crawford, M. Examining the role of aquatic vegetation in methane production; examples from a shallow high latitude lake in Abisko, Sweden [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0447, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066684 Hugelius, Gustaf (Stockholm University, Stockholm, Sweden); Siewert, Matthias B. and Heim, Birgit. High resolution partitioning of soil properties and soil organic carbon storage in the Lena River delta [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B42C-01, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064508 Jakobsson, Martin (Stockholm University, Department of Geological Sciences, Stockholm, Sweden); O'Regan, Matthew; Kirchner, Nina; Ananiev, R.; Backman, J.; Barrientos, Natalia; Chernykh, Denis; Coxall, Helen; Cronin, T. M.; Koshurnikov, A.; Lobkovsky, L. I.; Mayer, L. A.; Noormets, R.; Muschitiello, Francesco; Nilsson, J.; Pearce, Christof; Semiletov, I. P. and Stranne, Christian. On the existence of an East Siberian-Chukchi ice sheet; new insights from the SWERUS-C3 Expedition 2014 [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0775, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064441 Johnson, Joel E. (University of New Hampshire, Department of Earth Sciences, Durham, NH); Varner, Ruth K.; Wik, Martin; Chanton, J. and Crill, Patrick M. Differentiating TOC sources, preservation, and potential methane emissions in sub-Arctic lakes in Sweden [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0449, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066720 Karion, A. (National Institute of Standards and Technology, Gaithersburg, MD); Sweeney, C.; Dinardo, Steven J.; Miller, J. B.; Wofsy, S. C.; Lindaas, J.; Luus, K. A.; Andrews, Arlyn E.; Commane, R.; Tans, P. P.; Henderson, J.; Wolter, Sonja; Newberger, Tim; Lin, J. C. and Miller, C. E. Seasonal and interannual variations in boreal Alaskan methane and carbon dioxide fluxes using atmospheric measurements from the CARVE tower [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43M-07, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066747 Kumar, J. (Oak Ridge National Laboratory, Climate Change Science Institute, Oak Ridge, TN); Langford, Z. and Hoffman, F. M. Characterizing biotic and abiotic properties of landscape and their implications for ecohydrological processes across scales [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B51C-0437, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064499 Levy, J. S. (University of Texas at Austin, Institute for Geophysics, Austin, TX). Shallow groundwater and brine processes in Antarctica; linking seasonal and interannual changes in active layer hydrology to ecosystem change and thermokarst formation [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C42B-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016070358 Marshall, Jill A. (University of California Berkeley, Berkeley, CA); Roering, Joshua J.; Rempel, Alan W.; Bartlein, Patrick J.; Merritts, Dorothy J. and Walter, Robert C. Critical zone architecture and the last glacial legacy in unglaciated North America [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract EP34A-08, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064429 Matthews, Elaine (NASA, Goddard Institute for Space Studies, New York, NY); Romanski, Joy N. and Olefeldt, D. Modeling natural wetlands; a new global framework built on wetland observations [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0430, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064444 McArthur, Kellen J. (Rochester Institute of Technology, Rochester, NY); McCalley, C. K.; Palace, Michael W.; Varner, Ruth K.; Herrick, C. and DelGreco, J. L. Using vegetation cover type to predict and scale peatland methane dynamics [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0454, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064437 McCalley, C. K. (Rochester Institute of Technology, Rochester, NY); Shorter, J. H.; Crill, Patrick M.; Hodgkins, S. B.; Chanton, J.; Saleska, S. R. and Varner, Ruth K. Long-term data on d¹³C-CH₄ emissions elucidate drivers of CH₄ metabolism in temperate and northern wetlands [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0443, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064517 Miller, C. (Rice University, Houston, TX); Dickens, G. R. and Jakobsson, Martin. Low methane concentrations in sediment along the Siberian slope; inference from pore water geochemistry [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0787, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066722 Neumann, R. B. (University of Washington, Department of Civil & Environmental Engineering, Seattle, WA); Moorberg, C.; Wong, A.; Waldrop, M. P. and Turetsky, M. R. Seasonal oxygen dynamics in a thermokarst bog in interior Alaska; implications for rates of methane oxidation [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B44B-02, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064440 Nicastro, A. J. D. (Miami University Oxford, Oxford, OH); Horruitiner, C. D.; Lundgren, D. J.; Sinclair, S. N.; Johnson, Joel E. and Varner, Ruth K. Variability of methane in Stordalen Mire stream sediments, Abisko, Sweden [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41C-0448, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066715 Olefeldt, D. (University of Alberta, Edmonton, AB, Canada); Goswami, S.; Grosse, G.; Hayes, D. J.; Hugelius, G.; Kuhry, P.; McGuire, A. D.; Romanovsky, V. E.; Sannel, Britta; Schuur, Edward and Turetsky, M. R. Thermokarst terrain; pan-Arctic distribution and soil carbon vulnerability [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43M-01, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066677 Onstott, T. C. (Princeton University, Princeton, NJ); Stackhouse, B. T.; Lau, C. Y. M.; Whyte, L. G.; Pfiffner, S. M. and Vishnivetskaya, T. A. Long term thawing experiments on intact cores of Arctic mineral cryosol; implications for greenhouse gas feedbacks from global warming [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-02, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066700 Reuss-Schmidt, K. (University of Sheffield, Animal and Plant Sciences, Sheffield, United Kingdom); Dash, J.; Edwards, M. E. and Zona, D. Assessing the contribution of Arctic lakes to the methane budget via upscaling and GOSAT satellite derived flux data [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43D-0594, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064473 Sapart, C. J. (Université Libre de Bruxelles, Brussels, Belgium); Shakhova, N. E.; Semiletov, I. P.; Jansen, J.; Kosmach, D.; Dudarev, O.; Szidat, S.; van der Veen, C.; Sergienko, V.; Salyuk, A.; Tumskoy, V.; Tison, J. L.; Egger, M. and Röckmann, T. The origin(s) of the methane excess in the shallow East Siberian Arctic shelf unravelled with triple isotope analysis [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33F-02, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066701 Sayres, D. S. (Harvard University, Cambridge, MA); Healy, C. E.; Munster, J. B.; Dobosy, R.; Dumas, E. J.; Kochendorfer, John; Wilkerson, J.; Baker, Bruce; Langford, J. and Anderson, J. G. Methane flux measurements from a low flying aircraft; what they tell us about regional heterogeneity in carbon flux over the North Slope of Alaska [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B43E-0608, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064514 Shcherbakova, Kseniya (National Research Tomsk Polytechnic University, Tomsk, Russian Federation); Steinbach, Julia; Holmstrand, Henry; Kosmach, D.; Panova, E.; Gustafsson, Orjan; Semiletov, I. P.; Shakhova, N. E. and Sapart, C. J. Observations of methane concentration and d13C-CH₄ in the East Siberian Sea waters [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0782, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064515 Steinbach, Julia (Stockholm University, Stockholm, Sweden); Holmstrand, Henry; Shcherbakova, K.; Kosmach, D.; Sapart, C. J.; Panova, E.; Bruchert, Volker; Semiletov, I. P.; Shakhova, N. E. and Gustafsson, Orjan. Triple-isotope-based source apportionment of methane in waters of the outer Laptev Sea [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0783, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064488 Steiner, N. (City University of New York, City College, Earth and Atmospheric Science, New York, NY); McDonald, K. C.; Dinardo, Steven J. and Miller, Charles E. Snowmelt and surface freeze/thaw timings over Alaska derived from passive microwave observations using a wavelet classifier [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C41D-0757, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064481 Tesi, Tommaso (Istituto di Scienze Marine, Bologna, Italy); Muschitiello, Francesco; Smittenberg, Rienk; Jakobsson, Martin; Vonk, Jorien; Hill, Pete; Dudarev, O.; Semiletov, I. P.; Kirchner, Nina; Noormets, R.; Andersson, August and Gustafsson, Orjan. Abrupt release of terrigenous organic carbon to the Laptev Sea at termination of the Younger Dryas [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C34A-04, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066748 Throckmorton, H. (Los Alamos National Laboratory, Los Alamos, NM); Heikoop, J. M.; Newman, B. D.; Wilson, C. J. and Wullschleger, S. D. Isotopic and geochemical fingerprinting of a polygonal Arctic ecosystem [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B51C-0439, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064501 Tumskoy, V. E. (Lomonosov Moscow State University, Moscow, Russian Federation). New approach to ice complex investigation [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C43A-0768, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016066682 Waldrop, M. P. (U. S. Geological Survey, Menlo Park, CA); Jones, M.; Manies, K.; McFarland, J. W.; Blazewicz, S.; Keller, J.; Haw, M.; Harden, J. W.; Medvedeff, C. and Turetsky, M. R. Microbial communities and greenhouse gas production from a thermokarst bog chronosequence; mechanisms of rapid carbon loss [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract B41J-07, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

2016064465 Wang, Y. (Tsinghua University, Department of Hydraulic Engineering, Beijing, China) and Yang, D. Impact of cryosphere hydrological changes on the river runoff in the Tibetan Plateau [abstr.]: in AGU 2015 fall meeting, American Geophysical Union Fall Meeting, 2015, Abstract C33E-0873, December 2015. Meeting: American Geophysical Union 2015 fall meeting, Dec. 14-18, 2015, San Francisco, CA.

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