A5102853921- Climate change and permafrost
- Cryospheric studies and observations
- Plant Water Relations and Carbon Dynamics
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Soil Carbon and Nitrogen Dynamics
- Peatlands and Wetlands Ecology
- Groundwater and Isotope Geochemistry
- Methane Hydrates and Related Phenomena
- Hydrocarbon exploration and reservoir analysis
- Synthetic Aperture Radar (SAR) Applications and Techniques
- Smart Materials for Construction
- Landslides and related hazards
- Polar Research and Ecology
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Pasture and Agricultural Systems
- Fire effects on ecosystems
- Soil, Finite Element Methods
- Infrared Target Detection Methodologies
- Soil Geostatistics and Mapping
- Plant responses to elevated CO2
- CCD and CMOS Imaging Sensors
- Soil and Unsaturated Flow
- Environmental and Agricultural Sciences
Chinese Academy of Sciences
2014-2024
Northwest Institute of Eco-Environment and Resources
2017-2024
Purdue University West Lafayette
2015-2024
University of Copenhagen
2020-2024
Hoseo University
2024
Lanzhou University
2023
Chungnam National University
2012
Permafrost regions contain approximately half of the carbon stored in land ecosystems and have warmed at least twice as much any other biome. This warming has influenced vegetation activity, leading to changes plant composition, physiology, biomass storage aboveground belowground components, ultimately impacting ecosystem balance. Yet, little is known about causes magnitude long-term above- ratio plants (η). Here, we analyzed η values using 3,013 plots 26,337 species-specific measurements...
Permafrost-affected ecosystems are subject to warming and thawing, which can increase the availability of subsurface nitrogen (N) with consequences in otherwise N-limited tundra alpine vegetation.Here, we quantify extent permafrost thawing corresponding effects on plant growth based a 20-year survey across 14 sites Tibetan Plateau.The showed that most have been upper zone all was rich inorganic N, mainly as ammonium.We further explore efficiency plants utilize 15 N-labelled N over five years...
[1] We established the first annual resolution tree ring δ18O chronology of Qilian juniper (Sabina przewalskii Kom.) for eastern margin Qaidam Basin, northwestern China. The mean cellulose in study region (33.46‰ ± 0.99‰) was higher than that (28.7‰) and Helan Mountains (27.66‰), northwest China, values other published research (15.0‰ to 33.0‰), possibly as a result heavier precipitation lower relative humidity (43%) during growing season. results our simple correlation, bootstrap response...
Under warm climate conditions, permafrost thawing results in the substantial release of carbon (C) into atmosphere and potentially triggers strong positive feedback to global warming. Soil microorganisms play an important role decomposing organic C permafrost, thus regulating ecosystem balance permafrost-affected regions. microbial community biomass are mainly affected by soil (SOC) content texture. Most studies have focused on acidic (pH < 7), whereas few examined alkaline >...
Abstract. The methane (CH4) cycle on the Qinghai–Tibet Plateau (QTP), world's largest high-elevation permafrost region, is sensitive to climate change and subsequent freezing thawing dynamics. Yet, its magnitudes, patterns, environmental controls are still poorly understood. Here, we report results from five continuous year-round CH4 observations a typical alpine steppe ecosystem in QTP region. Our suggest that region was sink of -0.86±0.23 g CH4-C m−2 yr−1 over 2012–2016, rate higher than...
Abstract Thermokarst lakes are widespread and developing on the Qinghai‐Tibet Plateau (QTP), they have modified hydrological processes water balance in region. Despite increasing attention, our understanding of behaviors thermokarst under permafrost degradation remains limited QTP. In this study, stable isotope tracers were used to characterize spatial seasonal changes central Significant variations factors influencing isotopic hydrology revealed through ice‐free season. Substantial...
Abstract. Grasslands are major terrestrial ecosystems in arid and semiarid regions, they play important roles the regional carbon dioxide (CO2) balance cycles. Sandy grasslands sensitive to climate change, yet magnitudes, patterns, environmental controls of their CO2 flows poorly understood for some regions (e.g., China's Horqin Land). Here, we report results from continuous year-round flux measurements 5 years a sandy grassland Land. The was net source at an annual scale with mean ecosystem...
Abstract Cold region ecosystems store vast amounts of soil organic carbon (C), which upon warming and decomposition can affect the C balance potentially change these from sinks to dioxide (CO 2 ) sources. We quantified decadal year‐round CO flux an alpine steppe‐ecosystem on Tibetan Plateau using eddy covariance automatic chamber approaches during a period significant (0.13°C per 10 years; 0.18°C in non‐growing season alone: 1st October next 30th April). The results showed that ongoing...
Under climate warming conditions, storage and conversion of soil inorganic carbon (SIC) play an important role in regulating (C) dynamics atmospheric CO2 content arid semi-arid areas. Carbonate formation alkaline can fix a large amount C the form C, resulting sink potentially slowing global trends. Therefore, understanding driving factors affecting carbonate mineral help better predict future change. Till date, most studies have focused on abiotic drivers (climate soil), whereas few examined...
Spatial information of particle size fractions (PSFs) is primary for understanding the thermal state permafrost in Qinghai-Tibet Plateau (QTP) response to climate change. However, limitation field observations and tremendous spatial heterogeneity hamper digital mapping PSF. This study integrated log-ratio transformation approaches, variable searching methods, machine learning techniques map surficial soil PSF distribution two typical regions. Results showed that Boruta technique identified...
Recent rapid warming has caused uneven impacts on the composition, structure, and functioning of northern ecosystems. It remains unknown how climatic drivers control linear non-linear trends in ecosystem productivity. Based a plant phenology index (PPI) product at spatial resolution 0.05° over 2000-2018, we used an automated polynomial fitting scheme to detect characterize trend types (i.e., no-trends) yearly-integrated PPI (PPIINT) for (> 30°N) ecosystems their dependence types. The...
Understanding carbon allocation in plants is essential for explaining their growth strategies during environmental adaptation. However, the role of mobile plant and its response to habitat conditions still disputed. In degraded meadow (alpine sandy grassland) non-degraded (typical alpine swamp meadow) on Qinghai-Tibetan Plateau, we measured monthly averages above-ground biomass (AGB) below-ground (BGB) investigated species each average concentration non-structural carbohydrates (NSCs), an...
Ground ice in permafrost stores substantial amounts of dissolved organic carbon (DOC) upon thaw, which may perpetuate a feedback regions, yet little is known to date about the dynamics DOC and source variability ground on Tibetan Plateau. Here, high-resolution data (4.8 m depth) from two profiles Northeastern Plateau (NETP) were firstly presented. We quantified concentrations (mean: 9.7–21.5 mg/L) revealed sizeable—by factor 7.0–36.0—enrichment relative other water elements TP. Results...
Abstract. Methane (CH4) cycle on the Qinghai–Tibetan Plateau (QTP), world's largest high-elevation permafrost region, is sensitive to climate change and subsequent cryoturbation dynamics. Yet its magnitudes, patterns, environmental controls are still poorly understood. Here we report results from five continuous year-round CH4 observation a typical alpine steppe ecosystem in QTP region. Results suggested region was sink of −0.86 ± 0.23 g CH4–C m-2 yr1 over 2012–2016, rate higher than that...
Abstract. Grassland ecosystems are major components of the terrestrial in arid and semiarid regions, play important roles regional carbon dioxide (CO2) balance cycle. Sandy grasslands sensitive to climate change, yet magnitudes, patterns, environmental controls their CO2 flows poorly understood. Here, we report results from continuous year-round observations 5 years a sandy grassland Horqin Land. The result showed that was source at annual scale (with mean net ecosystem exchange (NEE) 48.88...