A5062189086- Climate change and permafrost
- Cryospheric studies and observations
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Geological Studies and Exploration
- Indigenous Studies and Ecology
- Peatlands and Wetlands Ecology
- Soil and Unsaturated Flow
- Landslides and related hazards
- Mercury impact and mitigation studies
- Microbial Community Ecology and Physiology
- Advanced battery technologies research
- Urban Heat Island Mitigation
- Remote Sensing in Agriculture
- Hydrology and Watershed Management Studies
- Climate variability and models
- Data Management and Algorithms
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Soil Carbon and Nitrogen Dynamics
- Rangeland Management and Livestock Ecology
- Soil Moisture and Remote Sensing
- Perovskite Materials and Applications
- Advanced Image Fusion Techniques
Lanzhou University
2016-2025
Northwest Institute of Eco-Environment and Resources
2017-2025
Chinese Academy of Sciences
2016-2025
Qinghai Normal University
2022-2025
University of Chinese Academy of Sciences
2013-2025
Dalian National Laboratory for Clean Energy
2025
Dalian Institute of Chemical Physics
2025
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)
2020-2024
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)
2020-2024
Polar Research Institute of China
2020-2021
Abstract Changing climate in northern regions is causing permafrost to thaw with major implications for the global mercury (Hg) cycle. We estimated Hg based on situ measurements of sediment total (STHg), soil organic carbon (SOC), and ratio (R HgC ) combined maps carbon. measured a median STHg 43 ± 30 ng g −1 R 1.6 0.9 μg C , consistent published results tundra soils 11,000 from 4,926 temperate, nonpermafrost sites North America Eurasia. estimate that Northern Hemisphere contain 1,656 962 Gg...
Abstract Global warming has led to permafrost degradation worldwide. The Qinghai‐Tibet Plateau (QTP) hosts most of the world's alpine permafrost, yet its impending changes remain largely unclear, thereby affecting regional hydrological and ecological processes global carbon budget. By employing a land surface model adapted simulate frozen ground, using state‐of‐the‐art multi‐model multi‐scenario data from Coupled Model Intercomparison Project Phase 6, in distribution thermal regimes on QTP...
Thermokarst lakes are potentially important sources of methane (CH4 ) and carbon dioxide (CO2 ). However, considerable uncertainty exists regarding emissions from thermokarst owing to a limited understanding their patterns motivators. In this study, we measured CH4 CO2 diffusive fluxes in 163 the Qinghai-Tibet Plateau (QTP) over 3 years May October. The median QTP were 1440 mg m-2 day-1 60 , respectively. rates related catchment land cover type. Sediment microbial abundance hydrochemistry...
Abstract. The response of seasonal soil freeze depth to climate change has repercussions for the surface energy and water balance, ecosystems, carbon cycle, nutrient exchange. Despite its importance, is largely unknown. This study employs Stefan solution observations from 845 meteorological stations investigate variations in across China. Observations include daily air temperatures, temperatures at various depths, mean monthly gridded normalized difference vegetation index. Results show that...
Abstract To investigate the thermal characteristics and dynamics of permafrost as well seasonally frozen ground over upper reaches Heihe River Basin (URHR), an observation network with 14 boreholes was established during 2011–2014. The in situ measurements indicated mean annual air temperature that ranged from −5.2 to −2.3°C at monitored elevation range ∼3,600–4,150 m, surface −1.3 1.7°C 2013–2017. 16‐ 18‐m depth −1.71°C on high (>4,000 m above sea level) north facing slope about 0‐C...
Abstract Important unknowns remain about how abrupt permafrost collapse (thermokarst) affects carbon balance and greenhouse gas flux, limiting our ability to predict the magnitude timing of feedback. We measured monthly, growing‐season fluxes CO 2 , CH 4 N O at a large thermokarst feature in alpine tundra on northern Qinghai‐Tibetan Plateau (QTP). Thermokarst formation disrupted plant growth soil hydrology, shifting ecosystem from sink weak source but decreasing level flux....
Abstract. Soil organic carbon (SOC) is very important in the vulnerable ecological environment of Third Pole; however, data regarding spatial distribution SOC are still scarce and uncertain. Based on multiple environmental variables soil profile from 458 pits (depth 0–1 m) 114 cores 0–3 m), this study uses a machine-learning approach to evaluate storage at depth interval m frozen ground area Pole region. Our results showed that stocks (SOCSs) exhibited decreasing pattern southeast towards...
Abstract Permafrost warming leads to greenhouse gas release the atmosphere, resulting in a positive feedback climate change. Earth system models indicate that more than 80% of near‐surface permafrost is projected disappear by end this century, but with high degree uncertainty. Here, we apply Stefan solution estimate degradation under future emission scenarios. We find most severe scenario likely lead only 14% decrease area extent at 3.5 m depth, and an 1.3% depth 6.0 m. Relative active layer...
Abstract Surface deformation plays an important role in permafrost studies as it is closely associated with the hydrological‐thermal dynamics of active layer and permafrost, affecting stability infrastructure. In this study, we have identified a significant underestimation surface over using Sentinel‐1 InSAR, which attributed to unwrapping errors interferograms. Specifically, inclusion interferograms longer temporal baselines SBAS network will cause occur more frequently severely, leading...
Abstract A close relationship exists between soil organic carbon (SOC) and reactive iron; however, little is known about the role of iron in SOC preservation permafrost regions. We determined amount associated with phases (OC‐Fe) regions Qinghai‐Tibetan Plateau (QTP). The results showed that percentage OC‐Fe ranged 0.9% 59.5% upper 30 cm represented 19.5 ± 12.3% total pool. No clear vertical distribution pattern was present 1 m soil. Throughout year, accounted for relatively stable...
Abstract Permafrost collapse, known as thermokarst, can alter soil properties and carbon emissions. However, little is regarding the effects of permafrost collapse in upland landscapes on biogeochemical processes that affect balance. In this study, we measured physiochemical at a large thermokarst feature hillslope northeastern Tibetan Plateau. We categorized surfaces into three different microrelief patches based type extent (control, drape, exposed areas). resulted substantial decreases...
Abstract The continental shelves of the Arctic Ocean and surrounding seas contain large stocks organic matter (OM) methane (CH 4 ), representing a potential ecosystem feedback to climate change not included in international agreements. We performed structured expert assessment with 25 permafrost researchers combine quantitative estimates sensitivity carbon subsea domain (i.e. unglaciated portions exposed during last glacial period). Experts estimated that contains ∼560 gigatons (GtC;...
Abstract Surface air temperatures affect a diverse set of physical and biological systems in many parts the world. For regional‐scale studies, gridded surface temperature data sets are frequently used as input variables. Here we evaluate 10 commonly products with spatial resolutions ranging from 0.1° × to 5.0° 5.0°, relative observations situ weather stations on Tibetan Plateau. Gridded consistently lower, mean annual biases −4.68 °C −1.72 °C, root square error (RMSE) 3.24 6.11 °C. The...
Climate-sensitive northern cryosphere inland waters emit greenhouse gases (GHGs) into the atmosphere, yet their total emissions remain poorly constrained. We present a data-driven synthesis of GHG from considering water body types, zones, and seasonality. find that annual are dominated by carbon dioxide ( <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" overflow="scroll"> <mml:mrow> <mml:msubsup> <mml:mn>1149.2</mml:mn> <mml:mn>1004.8</mml:mn> <mml:mn>1307.5</mml:mn>...
Abstract The response of dissolved organic carbon (DOC) flux to permafrost degradation is one the major sources uncertainty in predicting feedback. We investigated DOC export and properties over two complete flow seasons a catchment on northern Qinghai‐Tibetan Plateau. concentration biodegradability decreased systematically as thaw depth increased through season, attributable changing degree microbial processing. Increasing aromaticity δ 13 C‐DOC indicated shifts toward more recalcitrant...
Abstract Vegetation is closely tied to climate change, hydrological processes, the carbon cycle, and energy balance. However, in cold regions, both vegetation changes are also coupled permafrost. The association between amplified warming greening Northern Hemisphere permafrost regions not clearly understood. We therefore produce an extended 1982–2015 normalized difference index record based on concatenated Global Inventory Modeling Mapping Studies Moderate‐Resolution Imaging...