Articles | Volume 12, issue 2
https://doi.org/10.5194/tc-12-595-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/tc-12-595-2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
21 Feb 2018
Research article |
| 21 Feb 2018
| 21 Feb 2018
Climate warming over the past half century has led to thermal degradation of permafrost on the Qinghai–Tibet Plateau
Youhua Ran
Key Laboratory of Remote Sensing of Gansu Province, Heihe Remote Sensing Experimental Research Station, Cold and Arid Regions Environmental
and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
University of Chinese Academy of Sciences, Beijing 100049, China
Key Laboratory of Remote Sensing of Gansu Province, Heihe Remote Sensing Experimental Research Station, Cold and Arid Regions Environmental
and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
University of Chinese Academy of Sciences, Beijing 100049, China
CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing 100101, China
Guodong Cheng
Key Laboratory of Remote Sensing of Gansu Province, Heihe Remote Sensing Experimental Research Station, Cold and Arid Regions Environmental
and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
Institute of Urban Studies, Shanghai Normal University, Shanghai 200234, China
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High-resolution 4D ERT monitoring of recently deglaciated sediments undergoing freeze-thaw transitions in the High Arctic
The evolution of Arctic permafrost over the last 3 centuries from ensemble simulations with the CryoGridLite permafrost model
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Environmental spaces for palsas and peat plateaus are disappearing at a circumpolar scale
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Modelling rock glacier ice content based on InSAR-derived velocity, Khumbu and Lhotse valleys, Nepal
The temperature-dependent shear strength of ice-filled joints in rock mass considering the effect of joint roughness, opening and shear rates
Significant underestimation of peatland permafrost along the Labrador Sea coastline in northern Canada
Estimation of stream water components and residence time in a permafrost catchment in the central Tibetan Plateau using long-term water stable isotopic data
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The Cryosphere, 18, 2979–2990, https://doi.org/10.5194/tc-18-2979-2024, https://doi.org/10.5194/tc-18-2979-2024, 2024
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Clemens Moser, Umberto Morra di Cella, Christian Hauck, and Adrián Flores Orozco
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We quantify hydrogeological properties in an active rock glacier by using electrical conductivity and induced polarization in an imaging framework and we used geophysical monitoring to track tracer test injections. The water content is spatially variable, and the water can move rapidly with a velocity in the range of cm/s through the active layer of the rock glacier. Hydrogeological parameters were linked to kinematic data to investigate the role of water content on rock glacier movement.
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Climate warming is thawing permafrost that makes up palsa (frost mound) peatlands, risking ecosystem collapse and carbon release as methane. We measure this regional degradation using radar satellite technology to examine ground elevation changes and show how terrain roughness measurements can be used to estimate local permafrost damage. We find that over half of Sweden's largest palsa peatlands are degrading, with the worse impacts to the north linked to increased winter precipitation.
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Young Arctic sediments, uncovered by retreating glaciers, are in continuous development, shaped by how water infiltrates and is stored in the near subsurface. Harsh weather conditions at high latitudes make direct observation of these environments extremely difficult. To address this, we deployed two automated sensor installations in Aug 21 on a glacier forefield in Svalbard. These recorded continuously for one year revealing unprecedented images of the ground’s freeze-thaw transition.
Moritz Langer, Jan Nitzbon, Brian Groenke, Lisa-Marie Assmann, Thomas Schneider von Deimling, Simone Maria Stuenzi, and Sebastian Westermann
The Cryosphere, 18, 363–385, https://doi.org/10.5194/tc-18-363-2024, https://doi.org/10.5194/tc-18-363-2024, 2024
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Using a model that can simulate the evolution of Arctic permafrost over centuries to millennia, we find that post-industrialization permafrost warming has three "hotspots" in NE Canada, N Alaska, and W Siberia. The extent of near-surface permafrost has decreased substantially since 1850, with the largest area losses occurring in the last 50 years. The simulations also show that volcanic eruptions have in some cases counteracted the loss of near-surface permafrost for a few decades.
Dotan Rotem, Vladimir Lyakhovsky, Hanne Hvidtfeldt Christiansen, Yehudit Harlavan, and Yishai Weinstein
The Cryosphere, 17, 3363–3381, https://doi.org/10.5194/tc-17-3363-2023, https://doi.org/10.5194/tc-17-3363-2023, 2023
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Frozen saline pore water, left over from post-glacial marine ingression, was found in shallow permafrost in a Svalbard fjord valley. This suggests that freezing occurred immediately after marine regression due to isostatic rebound. We conducted top-down freezing simulations, which confirmed that with Early to mid-Holocene temperatures (e.g. −4 °C), freezing could progress down to 20–40 m within 200 years. This, in turn, could inhibit flow through the sediment, therefore preserving saline fluids.
Oona Leppiniemi, Olli Karjalainen, Juha Aalto, Miska Luoto, and Jan Hjort
The Cryosphere, 17, 3157–3176, https://doi.org/10.5194/tc-17-3157-2023, https://doi.org/10.5194/tc-17-3157-2023, 2023
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For the first time, suitable environments for palsas and peat plateaus were modeled for the whole Northern Hemisphere. The hotspots of occurrences were in northern Europe, western Siberia, and subarctic Canada. Climate change was predicted to cause almost complete loss of the studied landforms by the late century. Our predictions filled knowledge gaps in the distribution of the landforms, and they can be utilized in estimation of the pace and impacts of the climate change over northern regions.
Justyna Czekirda, Bernd Etzelmüller, Sebastian Westermann, Ketil Isaksen, and Florence Magnin
The Cryosphere, 17, 2725–2754, https://doi.org/10.5194/tc-17-2725-2023, https://doi.org/10.5194/tc-17-2725-2023, 2023
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We assess spatio-temporal permafrost variations in selected rock walls in Norway over the last 120 years. Ground temperature is modelled using the two-dimensional ground heat flux model CryoGrid 2D along nine profiles. Permafrost probably occurs at most sites. All simulations show increasing ground temperature from the 1980s. Our simulations show that rock wall permafrost with a temperature of −1 °C at 20 m depth could thaw at this depth within 50 years.
Yan Hu, Stephan Harrison, Lin Liu, and Joanne Laura Wood
The Cryosphere, 17, 2305–2321, https://doi.org/10.5194/tc-17-2305-2023, https://doi.org/10.5194/tc-17-2305-2023, 2023
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Rock glaciers are considered to be important freshwater reservoirs in the future climate. However, the amount of ice stored in rock glaciers is poorly quantified. Here we developed an empirical model to estimate ice content in rock the glaciers in the Khumbu and Lhotse valleys, Nepal. The modelling results confirmed the hydrological importance of rock glaciers in the study area. The developed approach shows promise in being applied to permafrost regions to assess water storage of rock glaciers.
Shibing Huang, Haowei Cai, Zekun Xin, and Gang Liu
The Cryosphere, 17, 1205–1223, https://doi.org/10.5194/tc-17-1205-2023, https://doi.org/10.5194/tc-17-1205-2023, 2023
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In this study, the warming degradation mechanism of ice-filled joints is revealed, and the effect of temperature, normal stress, shear rate and joint opening on the shear strength of rough ice-filled joints is investigated. The shear rupture modes include shear cracking of joint ice and debonding of the ice–rock interface, which is related to the above factors. The bonding strength of the ice–rock interface is larger than the shear strength of joint ice when the temperature is below −1 ℃.
Yifeng Wang, Robert G. Way, Jordan Beer, Anika Forget, Rosamond Tutton, and Meredith C. Purcell
The Cryosphere, 17, 63–78, https://doi.org/10.5194/tc-17-63-2023, https://doi.org/10.5194/tc-17-63-2023, 2023
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Peatland permafrost in northeastern Canada has been misrepresented by models, leading to significant underestimates of peatland permafrost and permafrost distribution along the Labrador Sea coastline. Our multi-stage, multi-mapper, consensus-based inventorying process, supported by field- and imagery-based validation efforts, identifies peatland permafrost complexes all along the coast. The highest density of complexes is found to the south of the current sporadic discontinuous permafrost limit.
Shaoyong Wang, Xiaobo He, Shichang Kang, Hui Fu, and Xiaofeng Hong
The Cryosphere, 16, 5023–5040, https://doi.org/10.5194/tc-16-5023-2022, https://doi.org/10.5194/tc-16-5023-2022, 2022
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This study used the sine-wave exponential model and long-term water stable isotopic data to estimate water mean residence time (MRT) and its influencing factors in a high-altitude permafrost catchment (5300 m a.s.l.) in the central Tibetan Plateau (TP). MRT for stream and supra-permafrost water was estimated at 100 and 255 d, respectively. Climate and vegetation factors affected the MRT of stream and supra-permafrost water mainly by changing the thickness of the permafrost active layer.
Bin Cao, Gabriele Arduini, and Ervin Zsoter
The Cryosphere, 16, 2701–2708, https://doi.org/10.5194/tc-16-2701-2022, https://doi.org/10.5194/tc-16-2701-2022, 2022
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We implemented a new multi-layer snow scheme in the land surface scheme of ERA5-Land with revised snow densification parameterizations. The revised HTESSEL improved the representation of soil temperature in permafrost regions compared to ERA5-Land; in particular, warm bias in winter was significantly reduced, and the resulting modeled near-surface permafrost extent was improved.
Tamara Mathys, Christin Hilbich, Lukas U. Arenson, Pablo A. Wainstein, and Christian Hauck
The Cryosphere, 16, 2595–2615, https://doi.org/10.5194/tc-16-2595-2022, https://doi.org/10.5194/tc-16-2595-2022, 2022
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With ongoing climate change, there is a pressing need to understand how much water is stored as ground ice in permafrost. Still, field-based data on permafrost in the Andes are scarce, resulting in large uncertainties regarding ground ice volumes and their hydrological role. We introduce an upscaling methodology of geophysical-based ground ice quantifications at the catchment scale. Our results indicate that substantial ground ice volumes may also be present in areas without rock glaciers.
Rowan Romeyn, Alfred Hanssen, and Andreas Köhler
The Cryosphere, 16, 2025–2050, https://doi.org/10.5194/tc-16-2025-2022, https://doi.org/10.5194/tc-16-2025-2022, 2022
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We have investigated a long-term record of ground vibrations, recorded by a seismic array installed in Adventdalen, Svalbard. This record contains a large number of
frost quakes, a type of ground shaking that can be produced by cracks that form as the ground cools rapidly. We use underground temperatures measured in a nearby borehole to model forces of thermal expansion and contraction that can cause these cracks. We also use the seismic measurements to estimate where these cracks occurred.
Hongwei Liu, Pooneh Maghoul, and Ahmed Shalaby
The Cryosphere, 16, 1157–1180, https://doi.org/10.5194/tc-16-1157-2022, https://doi.org/10.5194/tc-16-1157-2022, 2022
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The knowledge of physical and mechanical properties of permafrost and its location is critical for the management of permafrost-related geohazards. Here, we developed a hybrid inverse and multiphase poromechanical approach to quantitatively estimate the physical and mechanical properties of a permafrost site. Our study demonstrates the potential of surface wave techniques coupled with our proposed data-processing algorithm to characterize a permafrost site more accurately.
Jiahua Zhang, Lin Liu, Lei Su, and Tao Che
The Cryosphere, 15, 3021–3033, https://doi.org/10.5194/tc-15-3021-2021, https://doi.org/10.5194/tc-15-3021-2021, 2021
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We improve the commonly used GPS-IR algorithm for estimating surface soil moisture in permafrost areas, which does not consider the bias introduced by seasonal surface vertical movement. We propose a three-in-one framework to integrate the GPS-IR observations of surface elevation changes, soil moisture, and snow depth at one site and illustrate it by using a GPS site in the Qinghai–Tibet Plateau. This study is the first to use GPS-IR to measure environmental variables in the Tibetan Plateau.
Juditha Undine Schmidt, Bernd Etzelmüller, Thomas Vikhamar Schuler, Florence Magnin, Julia Boike, Moritz Langer, and Sebastian Westermann
The Cryosphere, 15, 2491–2509, https://doi.org/10.5194/tc-15-2491-2021, https://doi.org/10.5194/tc-15-2491-2021, 2021
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This study presents rock surface temperatures (RSTs) of steep high-Arctic rock walls on Svalbard from 2016 to 2020. The field data show that coastal cliffs are characterized by warmer RSTs than inland locations during winter seasons. By running model simulations, we analyze factors leading to that effect, calculate the surface energy balance and simulate different future scenarios. Both field data and model results can contribute to a further understanding of RST in high-Arctic rock walls.
Thomas Schneider von Deimling, Hanna Lee, Thomas Ingeman-Nielsen, Sebastian Westermann, Vladimir Romanovsky, Scott Lamoureux, Donald A. Walker, Sarah Chadburn, Erin Trochim, Lei Cai, Jan Nitzbon, Stephan Jacobi, and Moritz Langer
The Cryosphere, 15, 2451–2471, https://doi.org/10.5194/tc-15-2451-2021, https://doi.org/10.5194/tc-15-2451-2021, 2021
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Climate warming puts infrastructure built on permafrost at risk of failure. There is a growing need for appropriate model-based risk assessments. Here we present a modelling study and show an exemplary case of how a gravel road in a cold permafrost environment in Alaska might suffer from degrading permafrost under a scenario of intense climate warming. We use this case study to discuss the broader-scale applicability of our model for simulating future Arctic infrastructure failure.
Rowan Romeyn, Alfred Hanssen, Bent Ole Ruud, Helene Meling Stemland, and Tor Arne Johansen
The Cryosphere, 15, 283–302, https://doi.org/10.5194/tc-15-283-2021, https://doi.org/10.5194/tc-15-283-2021, 2021
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A series of unusual ground motion signatures were identified in geophone recordings at a frost polygon site in Adventdalen on Svalbard. By analysing where the ground motion originated in time and space, we are able to classify them as cryoseisms, also known as frost quakes, a ground-cracking phenomenon that occurs as a result of freezing processes. The waves travelling through the ground produced by these frost quakes also allow us to measure the structure of the permafrost in the near surface.
Lei Cai, Hanna Lee, Kjetil Schanke Aas, and Sebastian Westermann
The Cryosphere, 14, 4611–4626, https://doi.org/10.5194/tc-14-4611-2020, https://doi.org/10.5194/tc-14-4611-2020, 2020
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A sub-grid representation of excess ground ice in the Community Land Model (CLM) is developed as novel progress in modeling permafrost thaw and its impacts under the warming climate. The modeled permafrost degradation with sub-grid excess ice follows the pathway that continuous permafrost transforms into discontinuous permafrost before it disappears, including surface subsidence and talik formation, which are highly permafrost-relevant landscape changes excluded from most land models.
Rupesh Subedi, Steven V. Kokelj, and Stephan Gruber
The Cryosphere, 14, 4341–4364, https://doi.org/10.5194/tc-14-4341-2020, https://doi.org/10.5194/tc-14-4341-2020, 2020
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Permafrost beneath tundra near Lac de Gras (Northwest Territories, Canada) contains more ice and less organic carbon than shown in global compilations. Excess-ice content of 20–60 %, likely remnant Laurentide basal ice, is found in upland till. This study is based on 24 boreholes up to 10 m deep. Findings highlight geology and glacial legacy as determinants of a mosaic of permafrost characteristics with potential for thaw subsidence up to several metres in some locations.
Bin Cao, Stephan Gruber, Donghai Zheng, and Xin Li
The Cryosphere, 14, 2581–2595, https://doi.org/10.5194/tc-14-2581-2020, https://doi.org/10.5194/tc-14-2581-2020, 2020
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This study reports that ERA5-Land (ERA5L) soil temperature bias in permafrost regions correlates with the bias in air temperature and with maximum snow height. While global reanalyses are important drivers for permafrost study, ERA5L soil data are not well suited for directly informing permafrost research decision making due to their warm bias in winter. To address this, future soil temperature products in reanalyses will require permafrost-specific alterations to their land surface models.
Ji-Woong Yang, Jinho Ahn, Go Iwahana, Sangyoung Han, Kyungmin Kim, and Alexander Fedorov
The Cryosphere, 14, 1311–1324, https://doi.org/10.5194/tc-14-1311-2020, https://doi.org/10.5194/tc-14-1311-2020, 2020
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Thawing permafrost may lead to decomposition of soil carbon and nitrogen and emission of greenhouse gases. Thus, methane and nitrous oxide compositions in ground ice may provide information on their production mechanisms in permafrost. We test conventional wet and dry extraction methods. We find that both methods extract gas from the easily extractable parts of the ice and yield similar results for mixing ratios. However, both techniques are unable to fully extract gas from the ice.
Nikita Demidov, Sebastian Wetterich, Sergey Verkulich, Aleksey Ekaykin, Hanno Meyer, Mikhail Anisimov, Lutz Schirrmeister, Vasily Demidov, and Andrew J. Hodson
The Cryosphere, 13, 3155–3169, https://doi.org/10.5194/tc-13-3155-2019, https://doi.org/10.5194/tc-13-3155-2019, 2019
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As Norwegian geologist Liestøl (1996) recognised,
in connection with formation of pingos there are a great many unsolved questions. Drillings and temperature measurements through the pingo mound and also through the surrounding permafrost are needed before the problems can be better understood. To shed light on pingo formation here we present the results of first drilling of pingo on Spitsbergen together with results of detailed hydrochemical and stable-isotope studies of massive-ice samples.
Coline Mollaret, Christin Hilbich, Cécile Pellet, Adrian Flores-Orozco, Reynald Delaloye, and Christian Hauck
The Cryosphere, 13, 2557–2578, https://doi.org/10.5194/tc-13-2557-2019, https://doi.org/10.5194/tc-13-2557-2019, 2019
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We present a long-term multisite electrical resistivity tomography monitoring network (more than 1000 datasets recorded from six mountain permafrost sites). Despite harsh and remote measurement conditions, the datasets are of good quality and show consistent spatio-temporal variations yielding significant added value to point-scale borehole information. Observed long-term trends are similar for all permafrost sites, showing ongoing permafrost thaw and ground ice loss due to climatic conditions.
Jing Tao, Randal D. Koster, Rolf H. Reichle, Barton A. Forman, Yuan Xue, Richard H. Chen, and Mahta Moghaddam
The Cryosphere, 13, 2087–2110, https://doi.org/10.5194/tc-13-2087-2019, https://doi.org/10.5194/tc-13-2087-2019, 2019
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The active layer thickness (ALT) in middle-to-high northern latitudes from 1980 to 2017 was produced at 81 km2 resolution by a global land surface model (NASA's CLSM) with forcing fields from a reanalysis data set, MERRA-2. The simulated permafrost distribution and ALTs agree reasonably well with an observation-based map and in situ measurements, respectively. The accumulated above-freezing air temperature and maximum snow water equivalent explain most of the year-to-year variability of ALT.
Robert Kenner, Jeannette Noetzli, Martin Hoelzle, Hugo Raetzo, and Marcia Phillips
The Cryosphere, 13, 1925–1941, https://doi.org/10.5194/tc-13-1925-2019, https://doi.org/10.5194/tc-13-1925-2019, 2019
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A new permafrost mapping method distinguishes between ice-poor and ice-rich permafrost. The approach was tested for the entire Swiss Alps and highlights the dominating influence of the factors elevation and solar radiation on the distribution of ice-poor permafrost. Our method enabled the indication of mean annual ground temperatures and the cartographic representation of permafrost-free belts, which are bounded above by ice-poor permafrost and below by permafrost-containing excess ice.
H. Brendan O'Neill, Stephen A. Wolfe, and Caroline Duchesne
The Cryosphere, 13, 753–773, https://doi.org/10.5194/tc-13-753-2019, https://doi.org/10.5194/tc-13-753-2019, 2019
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In this paper, we present new models to depict ground ice in permafrost in Canada, incorporating knowledge from recent studies. The model outputs we present reproduce observed regional ground ice conditions and are generally comparable with previous mapping. However, our results are more detailed and more accurately reflect ground ice conditions in many regions. The new mapping is an important step toward understanding terrain response to permafrost degradation in Canada.
Stephanie Coulombe, Daniel Fortier, Denis Lacelle, Mikhail Kanevskiy, and Yuri Shur
The Cryosphere, 13, 97–111, https://doi.org/10.5194/tc-13-97-2019, https://doi.org/10.5194/tc-13-97-2019, 2019
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This study provides a detailed description of relict glacier ice preserved in the permafrost of Bylot Island (Nunavut). We demonstrate that the 18O composition (-34.0 0.4 ‰) of the ice is consistent with the late Pleistocene age ice in the Barnes Ice Cap. As most of the glaciated Arctic landscapes are still strongly determined by their glacial legacy, the melting of these large ice bodies could have significant impacts on permafrost geosystem landscape dynamics and ecosystems.
Robert G. Way, Antoni G. Lewkowicz, and Yu Zhang
The Cryosphere, 12, 2667–2688, https://doi.org/10.5194/tc-12-2667-2018, https://doi.org/10.5194/tc-12-2667-2018, 2018
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Isolated patches of permafrost in southeast Labrador are among the southernmost lowland permafrost features in Canada. Local characteristics at six sites were investigated from Cartwright, NL (~ 54° N) to Blanc-Sablon, QC (~ 51° N). Annual ground temperatures varied from −0.7 °C to −2.3 °C with permafrost thicknesses of 1.7–12 m. Ground temperatures modelled for two sites showed permafrost disappearing at the southern site by 2060 and persistence beyond 2100 at the northern site only for RCP2.6.
Zeze Ran and Gengnian Liu
The Cryosphere, 12, 2327–2340, https://doi.org/10.5194/tc-12-2327-2018, https://doi.org/10.5194/tc-12-2327-2018, 2018
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This article provides the first rock glacier inventory of Daxue Shan, south- eastern Tibetan Plateau. This study provides important data for exploring the relation between maritime periglacial environments and the development of rock glaciers on the south-eastern Tibetan Plateau (TP). It may also highlight the characteristics typical of rock glaciers found in a maritime setting.
Charles J. Abolt, Michael H. Young, Adam L. Atchley, and Dylan R. Harp
The Cryosphere, 12, 1957–1968, https://doi.org/10.5194/tc-12-1957-2018, https://doi.org/10.5194/tc-12-1957-2018, 2018
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We investigate the relationship between ice wedge polygon topography and near-surface ground temperature using a combination of field work and numerical modeling. We analyze a year-long record of ground temperature across a low-centered polygon, then demonstrate that lower rims and deeper troughs promote warmer conditions in the ice wedge in winter. This finding implies that ice wedge cracking and growth, which are driven by cold conditions, can be impeded by rim erosion or trough subsidence.
Bing Gao, Dawen Yang, Yue Qin, Yuhan Wang, Hongyi Li, Yanlin Zhang, and Tingjun Zhang
The Cryosphere, 12, 657–673, https://doi.org/10.5194/tc-12-657-2018, https://doi.org/10.5194/tc-12-657-2018, 2018
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This study developed a distributed hydrological model coupled with cryospherical processes and applied it in order to simulate the long-term change of frozen ground and its effect on hydrology in the upper Heihe basin. Results showed that the permafrost area shrank by 8.8%, and the frozen depth of seasonally frozen ground decreased. Runoff in cold seasons and annual liquid soil moisture increased due to frozen soils change. Groundwater recharge was enhanced due to the degradation of permafrost.
Lin Liu and Kristine M. Larson
The Cryosphere, 12, 477–489, https://doi.org/10.5194/tc-12-477-2018, https://doi.org/10.5194/tc-12-477-2018, 2018
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We demonstrate the use of reflected GPS signals to measure elevation changes over a permafrost area in northern Alaska. For the first time, we construct a daily-sampled time series of elevation changes over 12 summers. Our results show regular thaw subsidence within each summer and a secular subsidence trend of 0.3 cm per year. This method promises a new way to utilize GPS data in cold regions for studying frozen ground consistently and sustainably over a long time.
Yonghong Yi, John S. Kimball, Richard H. Chen, Mahta Moghaddam, Rolf H. Reichle, Umakant Mishra, Donatella Zona, and Walter C. Oechel
The Cryosphere, 12, 145–161, https://doi.org/10.5194/tc-12-145-2018, https://doi.org/10.5194/tc-12-145-2018, 2018
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An important feature of the Arctic is large spatial heterogeneity in active layer conditions. We developed a modeling framework integrating airborne longwave radar and satellite data to investigate active layer thickness (ALT) sensitivity to landscape heterogeneity in Alaska. We find uncertainty in spatial and vertical distribution of soil organic carbon is the largest factor affecting ALT accuracy. Advances in remote sensing of soil conditions will enable more accurate ALT predictions.
Benjamin Mewes, Christin Hilbich, Reynald Delaloye, and Christian Hauck
The Cryosphere, 11, 2957–2974, https://doi.org/10.5194/tc-11-2957-2017, https://doi.org/10.5194/tc-11-2957-2017, 2017
Defu Zou, Lin Zhao, Yu Sheng, Ji Chen, Guojie Hu, Tonghua Wu, Jichun Wu, Changwei Xie, Xiaodong Wu, Qiangqiang Pang, Wu Wang, Erji Du, Wangping Li, Guangyue Liu, Jing Li, Yanhui Qin, Yongping Qiao, Zhiwei Wang, Jianzong Shi, and Guodong Cheng
The Cryosphere, 11, 2527–2542, https://doi.org/10.5194/tc-11-2527-2017, https://doi.org/10.5194/tc-11-2527-2017, 2017
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The area and distribution of permafrost on the Tibetan Plateau are unclear and controversial. This paper generated a benchmark map based on the modified remote sensing products and validated it using ground-based data sets. Compared with two existing maps, the new map performed better and showed that permafrost covered areas of 1.06 × 106 km2. The results provide more detailed information on the permafrost distribution and basic data for use in future research on the Tibetan Plateau permafrost.
Jorien E. Vonk, Tommaso Tesi, Lisa Bröder, Henry Holmstrand, Gustaf Hugelius, August Andersson, Oleg Dudarev, Igor Semiletov, and Örjan Gustafsson
The Cryosphere, 11, 1879–1895, https://doi.org/10.5194/tc-11-1879-2017, https://doi.org/10.5194/tc-11-1879-2017, 2017
Florence Magnin, Jean-Yves Josnin, Ludovic Ravanel, Julien Pergaud, Benjamin Pohl, and Philip Deline
The Cryosphere, 11, 1813–1834, https://doi.org/10.5194/tc-11-1813-2017, https://doi.org/10.5194/tc-11-1813-2017, 2017
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Permafrost degradation in high mountain rock walls provokes destabilisation, constituting a threat for human activities. In the Mont Blanc massif, more than 700 rockfalls have been inventoried in recent years (2003, 2007–2015). Understanding permafrost evolution is thus crucial to sustain this densely populated area. This study investigates the changes in rock wall permafrost from 1850 to the recent period and possible optimistic or pessimistic evolutions during the 21st century.
Gonçalo Vieira, Carla Mora, and Ali Faleh
The Cryosphere, 11, 1691–1705, https://doi.org/10.5194/tc-11-1691-2017, https://doi.org/10.5194/tc-11-1691-2017, 2017
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The Toubkal is the highest massif in North Africa (4167 m). Landforms and deposits above 3000 m show the effects of frost action in the present-day geomorphological dynamics, but data on ground temperatures were lacking. In this study ground surface temperature data measured across an altitudinal transect are presented and analysed for the first time. The highlight is the possible occurrence of permafrost at an elevation of 3800 m, which may be of high ecological and hydrological significance.
Sebastian Westermann, Maria Peter, Moritz Langer, Georg Schwamborn, Lutz Schirrmeister, Bernd Etzelmüller, and Julia Boike
The Cryosphere, 11, 1441–1463, https://doi.org/10.5194/tc-11-1441-2017, https://doi.org/10.5194/tc-11-1441-2017, 2017
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We demonstrate a remote-sensing-based scheme estimating the evolution of ground temperature and active layer thickness by means of a ground thermal model. A comparison to in situ observations from the Lena River delta in Siberia indicates that the model is generally capable of reproducing the annual temperature regime and seasonal thawing of the ground. The approach could hence be a first step towards remote detection of ground thermal conditions in permafrost areas.
Gautier Davesne, Daniel Fortier, Florent Domine, and James T. Gray
The Cryosphere, 11, 1351–1370, https://doi.org/10.5194/tc-11-1351-2017, https://doi.org/10.5194/tc-11-1351-2017, 2017
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This study presents data from Mont Jacques-Cartier, the highest summit in the Appalachians of south-eastern Canada, to demonstrate that the occurrence of contemporary permafrost body is associated with a very thin and wind-packed winter snow cover which brings local azonal topo-climatic conditions on the dome-shaped summit. This study is an important preliminary step in modelling the regional spatial distribution of permafrost on the highest summits in eastern North America.
Jonas Wicky and Christian Hauck
The Cryosphere, 11, 1311–1325, https://doi.org/10.5194/tc-11-1311-2017, https://doi.org/10.5194/tc-11-1311-2017, 2017
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Talus slopes are a widespread geomorphic feature, which may show permafrost conditions even at low elevation due to cold microclimates induced by a gravity-driven internal air circulation. We show for the first time a numerical simulation of this internal air circulation of a field-scale talus slope. Results indicate that convective heat transfer leads to a pronounced ground cooling in the lower part of the talus slope favoring the persistence of permafrost.
Graham L. Gilbert, Stefanie Cable, Christine Thiel, Hanne H. Christiansen, and Bo Elberling
The Cryosphere, 11, 1265–1282, https://doi.org/10.5194/tc-11-1265-2017, https://doi.org/10.5194/tc-11-1265-2017, 2017
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We reconstruct the Holocene development of the Zackenberg River delta (northeast Greenland) using a combination of sedimentology, cryostratigraphy, and geochronology. We distinguish four major depositional environments and identify three cryofacies. We apply the principles of cryostratigraphy to infer the aggradational history of permafrost. This paper contains an archive of ground ice in epigenetic permafrost in northeast Greenland.
Xiaoqing Peng, Tingjun Zhang, Oliver W. Frauenfeld, Kang Wang, Bin Cao, Xinyue Zhong, Hang Su, and Cuicui Mu
The Cryosphere, 11, 1059–1073, https://doi.org/10.5194/tc-11-1059-2017, https://doi.org/10.5194/tc-11-1059-2017, 2017
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Previous research has paid significant attention to permafrost, e.g. active layer thickness, soil temperature, area extent, and associated degradation leading to other changes. However, less focus has been given to seasonally frozen ground and vast area extent. We combined data from more than 800 observation stations, as well as gridded data, to investigate soil freeze depth across China. The results indicate that soil freeze depth decreases with climate warming.
Carina Schuh, Andrew Frampton, and Hanne Hvidtfeldt Christiansen
The Cryosphere, 11, 635–651, https://doi.org/10.5194/tc-11-635-2017, https://doi.org/10.5194/tc-11-635-2017, 2017
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This study investigates how soil moisture retention characteristics impact ice and moisture redistribution, heat transport and active layer thickness under permafrost conditions. This is relevant for understanding how climate change interacts with permafrost, which is important because there is much stored carbon in permafrost, which may be released to the atmosphere as permafrost degrades and may then act to further enhance climate warming.
Stephan Gruber, Renate Fleiner, Emilie Guegan, Prajjwal Panday, Marc-Olivier Schmid, Dorothea Stumm, Philippus Wester, Yinsheng Zhang, and Lin Zhao
The Cryosphere, 11, 81–99, https://doi.org/10.5194/tc-11-81-2017, https://doi.org/10.5194/tc-11-81-2017, 2017
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We review what can be inferred about permafrost in the mountains of the Hindu Kush Himalaya region. This is important because the area of permafrost exceeds that of glaciers in this region. Climate change will produce diverse permafrost-related impacts on vegetation, water quality, geohazards, and livelihoods. To mitigate this, a better understanding of high-elevation permafrost in subtropical latitudes as well as the pathways connecting environmental change and human livelihoods, is needed.
Amund F. Borge, Sebastian Westermann, Ingvild Solheim, and Bernd Etzelmüller
The Cryosphere, 11, 1–16, https://doi.org/10.5194/tc-11-1-2017, https://doi.org/10.5194/tc-11-1-2017, 2017
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Palsas and peat plateaus are permafrost landforms in subarctic mires which constitute sensitive ecosystems with strong significance for vegetation, wildlife, hydrology and carbon cycle. We have systematically mapped the occurrence of palsas and peat plateaus in northern Norway by interpretation of aerial images from the 1950s until today. The results show that about half of the area of palsas and peat plateaus has disappeared due to lateral erosion and melting of ground ice in the last 50 years.
Joan Govaerts, Koen Beerten, and Johan ten Veen
The Cryosphere, 10, 2907–2922, https://doi.org/10.5194/tc-10-2907-2016, https://doi.org/10.5194/tc-10-2907-2016, 2016
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The Rupelian Clay in the Netherlands is currently the subject of a feasibility study with respect to the storage of radioactive waste in the Netherlands (OPERA-project). Many features need to be considered in the assessment of the long-term evolution of the natural environment surrounding a geological waste disposal facility. One of these is permafrost development since it may have an impact on various components of the disposal system.
Cited articles
Brown, R. D. and Mote, P. W.: The response of Northern Hemisphere snow cover
to a changing climate, J. Climate, 22, 2124–2145, 2009.
Brunsdon, C., Fotheringham, S., and Charlton, M.: Geographically weighted
regression, J. Roy. Stat. Soc. D, 47, 431–443, 1998.
Cheng, G. D.: Problems on zonation of high-altitude permafrost, ACTA
Geographica Sinica, 39, 185–193, 1984 (in Chinese).
Cheng, G.: Influences of local factors on permafrost occurrence and their
implications for Qinghai-Xizang Railway design, Sci. China D, 47, 704–709, 2004.
Cheng, G.: A roadbed cooling approach for the construction of Qinghai–Tibet
Railway, Cold Reg. Sci. Technol., 42, 169–176, 2005.
Cheng, G. D. and Jin, H. J.: Permafrost and groundwater on the Qinghai-Tibet
Plateau and in northeast China, Hydrogeol. J., 21, 5–23, 2013.
Cheng, G. D. and Wu, T. H.: Responses of permafrost to climate change and
their environmental significance, Qinghai-Tibet Plateau, J.
Geophys. Res.-Earth Surf., 112, F02S03, https://doi.org/10.1029/2006JF000631,
2007.
Cheng, G., Sun, Z., and Niu, F.: Application of the roadbed cooling approach
in Qinghai-Tibet railway engineering, Cold Reg. Sci.
Technol., 53, 241–258, 2008.
Cheng, W. M., Zhao, S. M., Zhou, C. H., and Chen, X.: Simulation of the Decadal
Permafrost Distribution on the Qinghai-Tibet Plateau (China) over the Past
50 Years, Permafrost Periglac., 23, 292–300, 2012.
Collett, T. S.: Energy resource potential of natural gas hydrates, AAPG
bulletin, 86, 1971-1992, 2002.
Conrad, O., Bechtel, B., Bock, M., Dietrich, H., Fischer, E., Gerlitz, L.,
Wehberg, J., Wichmann, V., and Böhner, J.: System for Automated Geoscientific
Analyses (SAGA) v. 2.1.4, Geosci. Model Dev., 8, 1991–2007,
https://doi.org/10.5194/gmd-8-1991-2015, 2015.
Ding, Y. and Haeberli, W.: Compilation of long-term glacier-fluctuation data
in China and a comparison with corresponding records from Switzerland,
J. Glaciol., 42, 389–400, 1996.
Garcia, D.: Robust smoothing of gridded data in one and higher dimensions
with missing values, Comput. Stat. Data Anal., 54,
1167–1178, 2010.
Giorgi, F., Hurrell, J. W., Marinucci, M. R., and Beniston, M.: Elevation
dependency of the surface climate change signal: a model study, J.
Climate, 10, 288–296, 1997.
Guo, W., Liu, S., Xu, J., Wu, L., Shangguan, D., Yao, X., Wei, J., Bao,
W., Yu, P., Liu, Q., and Jiang, Z.: The second Chinese glacier inventory:
data, methods and results, J. Glaciol., 61, 357–372, 2015.
Hachem, S., Allard, M., and Duguay, C.: Using the MODIS land surface
temperature product for mapping permafrost: an application to Northern
Quebec and Labrador, Canada, Permafrost Periglac., 20,
407–416, 2009.
Hachem, S., Duguay, C. R., and Allard, M.: Comparison of MODIS-derived land
surface temperatures with ground surface and air temperature measurements in
continuous permafrost terrain, The Cryosphere, 6, 51–69,
https://doi.org/10.5194/tc-6-51-2012, 2012.
Haeberli, W.: Investigating glacier – permafrost relationships in
high-mountain areas: historical background, selected examples and research
needs, in: Cryospheric Systems – Glaciers and Permafrost, edited by:
Harris, C. and Murton, J. B., Geological Society Special Publication 242, London,
29–37, 2005.
Haeberli, W. and Hohmann, R.: Climate, glaciers and permafrost in the Swiss
Alps 2050: scenarios, consequences and recommendations, in: Proceedings Ninth
International Conference on Permafrost, 1, 607–612, 2008.
Henderson-Sellers, A. and Hughes, N. A.: Albedo and its importance in
climate theory, Prog. Phys. Geogr., 6, 1–44, 1982.
Hinzman, L. D., Deal, C. J., McGuire, A. D., Mernild, S. H., Polyakov, I.
V., and Walsh, J. E.: Trajectory of the Arctic as an integrated system,
Ecol. Appl., 23, 1837–1868, 2013.
Huang, X., Deng, J., Wang, W., Feng, Q., and Liang, T.: Impact of climate and
elevation on snow cover using integrated remote sensing snow products in
Tibetan Plateau, Remote Sens. Environ., 190, 274–288, 2017.
International Permafrost Association (IPA): IPA-IPY Thermal State of
Permafrost (TSP) Snapshot Borehole Inventory, Version 1. Boulder, Colorado
USA. NSIDC: National Snow and Ice Data Center, https://doi.org/10.7265/N57D2S25, 2010.
Jin, H., Zhao, L., Wang, S., and Jin, R.: Thermal regimes and degradation
modes of permafrost along the Qinghai-Tibet Highway, Sci. China D, 49, 1170–1183, 2006.
Jin, H., Luo, D., Wang, S., Lü, L., and Wu, J.: Spatiotemporal
variability of permafrost degradation on the Qinghai-Tibet Plateau, Sci.
Cold Arid Reg., 3, 281–305, 2011.
Jorgenson, M. T., Romanovsky, V., Harden, J., Shur, Y., O'Donnell, J.,
Schuur, E. A., Kanevskiy, M., and Marchenko, S.: Resilience and
vulnerability of permafrost to climate change, Can. J. Forest
Res., 40, 1219–1236, 2010.
Kogan, F., Powell, A., and Fedorov, O.: Use of Satellite and In-Situ Data to
Improve Sustainability, Springer, 2011.
Kumar, S., Lal, R., and Liu, D.: A geographically weighted regression
kriging approach for mapping soil organic carbon stock, Geoderma, 189,
627–634, 2012.
Larsen, P. H., Goldsmith, S., Smith, O., Wilson, M. L., Strzepek, K.,
Chinowsky, P., and Saylor, B.: Estimating future costs for Alaska public
infrastructure at risk from climate change, Global Environ.
Change, 18, 442–457, 2008.
Lawrence, D. M., Slater, A. G., Romanovsky, V. E., and Nicolsky, D. J.:
Sensitivity of a model projection of near-surface permafrost degradation to
soil column depth and representation of soil organic matter, J.
Geophys. Res.-Earth Surf., 113, F02011, https://doi.org/10.1029/2007JF000883, 2008.
Lawrence, D. M., Oleson, K. W., Flanner, M. G., Thornton, P. E., Swenson, S.
C., Lawrence, P. J., Zeng, X. B., Yang, Z. L., Levis, S., Sakaguchi, K., Bonan,
G. B., and Slater, A. G.: Parameterization improvements and functional and
structural advances in version 4 of the Community Land Model, J.
Adv. Model. Earth Syst., 3, M03001,
https://doi.org/10.1029/2011MS000045, 2011.
Li, S. D. and Cheng, G. D.: Map of permafrost on the Qinghai-Tibet Plateau
(1:3 000 000), Gansu Culture Press, Lanzhou, 1996 (in Chinese).
Li, S., Cheng, G., and Guo, D.: The future thermal regime of numerical
simulating permafrost on Qinghai-Xizang (Tibet) Plateau, China, under
climate warming, Sci. China Ser. D, 39, 434–441, 1996.
Li, X., Cheng, G., Jin, H., Kang, E., Che, T., Jin, R., Wu, L., Nan, Z. T.,
Wang, J., and Shen, Y.: Cryospheric change in China, Global Planet.
Change, 62, 210–218, 2008.
Liu, X. and Chen, B.: Climatic warming in the Tibetan Plateau during recent
decades, Int. J. Climatol., 20, 1729–1742, 2000.
Liu, X. D., Yin, Z. Y., Shao, X. M., and Qin, N. S.: Temporal trends and
variability of daily maximum and minimum, extreme temperature events, and
growing season length over the eastern and central Tibetan Plateau during
1961–2003, J. Geophys. Res., 111, D19109, https://doi.org/10.1029/2005JD006915, 2006.
Liu, X., Cheng, Z., Yan, L., and Yin, Z. Y.: Elevation dependency of recent
and future minimum surface air temperature trends in the Tibetan Plateau and
its surroundings, Global Planet. Change, 68, 164–174, 2009.
Luo, D. L., Jin, H. J., Lin, L., You, Y. H., Yang, S. Z., and Wang, Y. P.:
Distributive features and controlling factors of permafrost and the active
layer thickness in the Bayan Har Mountains along the Qinghai-Kangding
Highway on Northeastern Qinghai-Tibet Plateau, Scient Geograph. Sin., 33,
635–640, 2013 (In Chinese, English abstract).
Luo, J., Niu, F., Lin, Z., Liu, M., and Yin, G.: Thermokarst lake changes
between 1969 and 2010 in the beilu river basin, qinghai – tibet plateau,
China, Sci. Bull., 60, 556–564, 2015.
McCalley, C. K., Woodcroft, B. J., Hodgkins, S. B., Wehr, R. A., Kim, E. H.,
Mondav, R., Crill, P. M., Chanton, J. P., Rich, V. I., Tyson, G. W., and
Saleska, S. R.: Methane dynamics regulated by microbial community response
to permafrost thaw, Nature, 514, 478–481, 2014.
Mu, C., Zhang, T., Wu, Q., Peng, X., Cao, B., Zhang, X., Cao, B., and
Cheng, G.: Editorial: Organic carbon pools in permafrost regions on the
Qinghai-Xizang (Tibetan) Plateau, The Cryosphere, 9, 479–486, https://doi.org/10.5194/tc-9-479-2015, 2015.
Nan, Z. T., Li, S. X., and Liu, Y, Z.: Mean annual ground temperature
distribution on the Tibetan Plateau: Permafrost distribution mapping and
further application, J. Glaciol. Geocryol., 24, 142–148,
2002 (in Chinese).
Nan, Z., Gao, Z., Li, S., and Wu, T.: Permafrost changes in the northern
limit of permafrost on the Qinghai-Tibet Plateau in the last 30 years, Acta
Geogr. Sinica, 58, 817–823, 2003 (In Chinese, English abstract).
Niu, F., Lin, Z., Liu, H., and Lu, J.: Characteristics of thermokarst lakes
and their influence on permafrost in Qinghai–Tibet
Plateau, Geomorphology, 132, 222–233, 2011.
Otto, J. C. and Keuschnig, M.: Permafrost-Glacier Interaction–Process
Understanding of Permafrost Reformation and
Degradation. permAfrost–Austrian Permafrost Research Initiative, Final
Report, Innsbruck: Institute for Interdisciplinary Mountain Research,
ÖAW, 3–16, 2014.
Permafrost Subcommittee, National Research Council of Canada: Glossary of
Permafrost and Related Ground-ice Terms, National Research Council of Canada
Technical Memorandum, 1988.
Pepin, N., Bradley, R. S., Diaz, H. F., Baraer, M., Caceres, E. B.,
Forsythe, N., Fowler, H., Greenwood, G., Hashmi, M. Z., Liu, X. D., Miller,
J. R., Ning, L., Ohmura, A., Palazzi, E., Rangwala, I., Schöner, W.,
Severskiy, I., Shahgedanova, M., Wang, M. B., Williamson, S. N., and Yang,
D. Q.: Elevation-dependent warming in mountain regions of the world, Nat.
Clim. Change, 5, 424–430, 2015.
Qin, J., Yang, K., Liang, S., and Guo, X.: The altitudinal dependence of
recent rapid warming over the Tibetan Plateau, Clim. Change, 97, 321–327,
2009.
Ran, Y. H. and Li, X.: Evaluation of the permafrost stability degradation
from 1980 to 2010 in China, Sci. Cold Arid Reg., 8,
0359–0366, available at: http://www.scar.ac.cn/fulltext/2016/5/20160501.htm
(last access: 6 February 2017), 2016.
Ran, Y., Li, X., Cheng, G., Zhang, T., Wu, Q., Jin, H., and Jin, R.:
Distribution of permafrost in China: an overview of existing permafrost
maps, Permafrost Periglac., 23, 322–333, 2012.
Ran, Y., Li, X., Jin, R., and Guo, J.: Remote sensing of the mean annual
surface temperature and surface frost number for mapping permafrost in
China, Arct. Antarct. Alp. Res., 47, 255–265, 2015.
Schaefer, K., Zhang, T., Bruhwiler, L., and Barrett, A. P.: Amount and
timing of permafrost carbon release in response to climate warming, Tellus
B, 63, 165–180, 2011.
Schuur, E. A., Vogel, J. G., Crummer, K. G., Lee, H., Sickman, J. O., and
Osterkamp, T. E.: The effect of permafrost thaw on old carbon release and
net carbon exchange from tundra, Nature, 459, 556–559, 2009.
Smith, L. C., Sheng, Y., MacDonald, G. M., and Hinzman, L. D.: Disappearing
arctic lakes, Science, 308, 1429–1429, 2005.
Smith, M. W. and Riseborough, D. W.: Permafrost monitoring and detection of
climate change, Permafrost Periglac., 7, 301–309, 1996.
Smith, M. W. and Riseborough, D. W.: Climate and the limits of permafrost:
a zonal analysis, Permafrost Periglac., 13, 1–15, 2002.
Sun, Z. Z., Wu, G. L., Yun, H. B., Liu, G. J., and Rui, P. F.: Permafrost
degradation under an embankment of the Qinghai-Tibet Railway in the southern
limit of permafrost, J. Glaciol. Geocryol., 36, 767–771, 2014 (in Chinese, English
abstract).
Stehman, S. V.: Selecting and interpreting measures of thematic
classification accuracy, Remote Sens. Environ., 62, 77–89, 1997.
Stieglitz, M., Déry, S. J., Romanovsky, V. E., and Osterkamp, T. E.: The
role of snow cover in the warming of arctic permafrost, Geophys. Res.
Lett., 30, 1721, https://doi.org/10.1029/2003GL017337, 2003.
Tang, Z., Wang, J., Li, H., and Yan, L.: Spatiotemporal changes of snow
cover over the Tibetan plateau based on cloud-removed moderate resolution
imaging spectroradiometer fractional snow cover product from 2001 to 2011,
J. Appl. Remote Sens., 7, 073582–073582, 2013.
Tarnocai, C., Canadell, J. G., Schuur, E. A. G., Kuhry, P., Mazhitova, G.,
and Zimov, S.: Soil organic carbon pools in the northern circumpolar
permafrost region, Global Biogeochem. Cy., 23, GB2023, https://doi.org/10.1029/2008GB003327, 2009.
Vancutsem, C., Ceccato, P., Dinku, T., and Connor, S. J.: Evaluation of
MODIS land surface temperature data to estimate air temperature in different
ecosystems over Africa, Remote Sens. Environ., 114, 449–465,
2010.
Wan, Z.: New refinements and validation of the MODIS land-surface
temperature/emissivity products, Remote Sens. Environ., 112,
59–74, 2008.
Wan, Z., Zhang, Y., Zhang, Q., and Li, Z. L.: Validation of the land-surface
temperature products retrieved from Terra Mode rate Resolution Imaging
Spectroradiometer data, Remote Sens. Environ., 83, 163–180, 2002.
Wan, Z., Zhang, Y., Zhang, Q., and Li, Z.L.: Quality assessment and
validation of the MODIS global land surface temperature, Int.
J. Remote Sens., 25, 261–274, 2004.
Wang, S. L., Jin, H. J., Li, S. X., and Zhao, L.: Permafrost degradation on the
Qinghai-Xizang (Tibet) Plateau and its environmental impacts, Permafrost
Periglac., 11, 43–53, 2000.
Wang, G., Garcia, D., Liu, Y., de Jeu, R., and Dolman, A.J.: A three
dimensional gap filling method for large geophysical datasets: application
to global satellite soil moisture observations, Environ. Modell.
Softw., 30, 139–142, 2012.
Wang, Q. F., Zhang, T. J., Wu, J. C., Peng, X. Q., Zhong, X. Y., Mou, C.,
Wang, K., Wu, Q. B., and Cheng, G. D.: Investigation on permafrost
distribution over the upper reaches of the Heihe River in the Qilian
Mountains, J. Glaciol. Geocryol., 35, 19–25, 2013 (in
Chinese, English abstract).
Wang, T., Peng, S., Lin, X., and Chang, J.: Declining snow cover may affect
spring phenological trend on the Tibetan Plateau, Proc.
Natl. Acad. Sci., 110, E2854–E2855, 2013.
Wang, W., Feng, Q., Yu, H., Liang, T., and Guo, N.: Spatio-temporal change
of vegetation on Tibetan Plateau based on AVHRR-NDVI data. In Geoscience and
Remote Sensing Symposium (IGARSS), 2016 IEEE International, 1374–1377,
IEEE, 2016.
Wang, X., Wu, C., Wang, H., Gonsamo, A., and Liu, Z.: No evidence of
widespread decline of snow cover on the Tibetan Plateau over
2000–2015, Scientific Rep., 7, 14645, https://doi.org/10.1038/s41598-017-15208-9, 2017.
Westermann, S., Langer, M., Boike, J., Heikenfeld, M., Peter, M.,
Etzelmüller, B., and Krinner, G.: Simulating the thermal regime and thaw
processes of ice-rich permafrost ground with the land-surface model CryoGrid
3, Geosci. Model Dev., 9, 523–546, https://doi.org/10.5194/gmd-9-523-2016,
2016.
Williams, P. J. and Smith, M.W.: The frozen earth: fundamentals of
geocryology, UK, Cambridge, Cambridge University Press, 1989.
Wu, D., Zhao, X., Liang, S., Zhou, T., Huang, K., Tang, B., and Zhao, W.:
Time-lag effects of global vegetation responses to climate change, Global
Change Biol., 21, 3520–3531, 2015.
Wu, J., Sheng, Y., Wu, Q., and Wen, Z.: Processes and modes of permafrost
degradation on the Qinghai-Tibet Plateau, Sci. China Earth
Scie., 53, 150–158, 2010.
Wu, Q. B., Zhang, Z. Q., and Liu, Y. Z.: Long-term thermal effect of asphalt
pavement on permafrost under embankment,
Cold Reg. Sci. Technol., 60, 221–229, 2010.
Wu, Q. B., Zhu, Y. L., and Liu, Y. Z.: Evaluation model of permafrost thermal
stability and thawing sensibility under engineering activity, Cold Reg.
Sci. Technol., 34, 19–30, 2002.
Xiang, Y., Xiao, Z. Q., Ling, S. L., Wang, J. D., and Song, J. L.:
Validation of Global LAnd Surface Satellite (GLASS) leaf area index product,
J. Remote Sens., 18, 573–596, 2014.
Xiao, Z., Liang, S., Wang, J., Chen, P., Yin, X., Zhang, L., and Song, J.:
Use of general regression neural networks for generating the GLASS leaf area
index product from time-series MODIS surface reflectance, IEEE Trans.
Geosci. Remote Sens., 52, 209–223, 2014.
Yang, M., Nelson, F. E., Shiklomanov, N. I., Guo, D., and Wan, G.:
Permafrost degradation and its environmental effects on the Tibetan Plateau:
A review of recent research, Earth-Sci. Rev., 103, 31–44, 2010.
Yao, Y. and Zhang, B.: MODIS-based estimation of air temperature of the
Tibetan Plateau, J. Geogr. Sci., 23, 627–640, 2013.
Ye, B. S., Ding, Y. J., and Liu, C. H.: Response of Valley Glaciers in
Various Size and Their Runoff to Climate Change, J. Glaciol.
Geocryol., 23, 103–110, 2001 (in Chinese, English abstract).
You, Y., Yu, Q., Pan, X., Wang, X., Guo, L., and Wu, Q.: Thermal effects of
lateral supra-permafrost water flow around a thermokarst lake on the
Qinghai-Tibet Plateau, Hydrol. Process., 31, 2429–2437, https://doi.org/10.1002/hyp.11193, 2017.
Yuan, X., Wang, W., Cui, J., Meng, F., Kurban, A., and De Maeyer, P.:
Vegetation changes and land surface feedbacks drive shifts in local
temperatures over Central Asia, Scientific Reports, 7, 2017.
Yu, H., Wu, Q. B., and Liu, Y. Z.: The long-term monitoring system on
permafrost regions along the Qinghai-Tibet Railway, J. Glaciol.
Geocryol., 30, 475–481, 2008 (In Chinese, English abstract).
Zhang, G., Yao, T., Xie, H., Kang, S., and Lei, Y.: Increased mass over the
Tibetan Plateau: from lakes or glaciers?, Geophys. Res. Lett.,
40, 2125–2130, 2013.
Zhang, T.: Influence of the seasonal snow cover on the ground thermal
regime: An overview, Rev. Geophys., 43, RG4002, https://doi.org/10.1029/2004RG000157, 2005.
Zhao, L., Wu, Q., Marchenko, S. S., and Sharkhuu, N.: Thermal state of
permafrost and active layer in Central Asia during the International Polar
Year, Permafrost Periglac., 21, 198–207, 2010.
Zhong, L., Ma, Y., Salama, M. S., and Su, Z.: Assessment of vegetation
dynamics and their response to variations in precipitation and temperature
in the Tibetan Plateau, Clim. Change, 103, 519–535, 2010.
Zhu, Z., Kang, G., Ma, Y., Xie, Q., Zhang, D., and Ning, J.: Temperature
damage and constitutive model of frozen soil under dynamic loading,
Mechan. Material., 102, 108–116, 2016.
Zou, D., Zhao, L., Sheng, Y., Chen, J., Hu, G., Wu, T., Wu, J., Xie, C., Wu,
X., Pang, Q., Wang, W., Du, E., Li, W., Liu, G., Li, J., Qin, Y., Qiao, Y.,
Wang, Z., Shi, J., and Cheng, G.: A new map of permafrost distribution on the
Tibetan Plateau, The Cryosphere, 11, 2527–2542,
https://doi.org/10.5194/tc-11-2527-2017, 2017.
Short summary
Approximately 88 % of the permafrost area in the 1960s has been thermally degraded in the past half century over the Qinghai–Tibetan Plateau. The mean elevations of the very cold, cold, cool, warm, very warm, and likely thawing permafrost areas increased by 88 m, 97 m, 155 m, 185 m, 161 m, and 250 m, respectively. This degradation may lead to increases in risks to infrastructure, flood, reductions in ecosystem resilience, and positive climate feedback.
Approximately 88 % of the permafrost area in the 1960s has been thermally degraded in the past...
