A5067340894- Cryospheric studies and observations
- Climate change and permafrost
- Hydrology and Watershed Management Studies
- Hydrological Forecasting Using AI
- Groundwater and Isotope Geochemistry
- Flood Risk Assessment and Management
- Arctic and Antarctic ice dynamics
- Climate variability and models
- Environmental and Agricultural Sciences
- Remote Sensing in Agriculture
- Species Distribution and Climate Change
- Remote Sensing and Land Use
- Land Use and Ecosystem Services
- Geology and Paleoclimatology Research
- Plant Water Relations and Carbon Dynamics
- Groundwater flow and contamination studies
- Soil and Unsaturated Flow
- Landslides and related hazards
- Coastal wetland ecosystem dynamics
- Geothermal Energy Systems and Applications
- Rangeland Management and Livestock Ecology
- Ecology and Vegetation Dynamics Studies
- Water Resources and Management
- Rock Mechanics and Modeling
- Forest, Soil, and Plant Ecology in China
China University of Geosciences (Beijing)
2011-2024
Under a warming climate, permafrost degradation has resulted in profound hydrogeological consequences. Here, we mainly review 240 recent relevant papers. Permafrost boosted groundwater storage and discharge to surface runoffs through improving hydraulic connectivity reactivation of flow systems, resulting reduced summer peaks, delayed autumn flattened annual hydrographs, deepening elongating paths. As result degradation, lowlands underlain by more continuous, colder, thicker are getting...
Abstract Headwater catchments have a direct impact on the water resources of downstream lowland regions as they supply freshwater in form surface runoff and discharging groundwater. Often, these mountainous contain expansive permafrost that may alter natural topographically controlled groundwater flow system. As could degrade with climate change, it is imperative to understand effect headwater catchments. This study characterizes evaluates context change movement using three‐dimensional,...
Abstract Climate warming has been driving hydrological changes across the globe, especially in high latitude and altitude regions. Long-term (1962–2012) streamflow records permafrost data Yangtze River source region were selected to analyze variations groundwater storage response climate warming. Results of Mann–Kendall test Morlet wavelet analysis show that anomalies both annual winter baseflow are near year 2010, their main period scales 37 years 34 years, respectively. The increased...
Under a persistent warming climate and increasing human activities, permafrost in the Source Area of Yellow River (SAYR) has been degrading regionally, resulting many eco-environmental problems. This paper reviews changes air temperature precipitation over past 60 years presents distribution degradation alpine SAYR. The review is focused on degradation–induced hydrology, wetlands, thermokarst lakes, ponds, vegetation. Mean annual temperatures have rising at an average rate 0.4°C/10a years,...
Our understanding of permafrost distribution is still limited, particularly in mountainous areas where highly heterogeneous environments and a lack reliable field data tend to prevail. The extensive rock glaciers the Qilian Mountains, located northeastern Tibetan Plateau, offers opportunity develop novel approach for mapping regions. In this study, total 1,530 glacier records were combined with situ drive machine learning models estimating presence. Three algorithms adopted, their accuracies...
The source region of the Yellow River, China, has experienced eco‐environmental deterioration in recent decades. River discharge reduced to zero numerous times since 1960, which left a devastating impact on water resources and ecosystems downstream. Seeking understand causes drying up, we analyze records discharge, temperature, precipitation explore linkages among them. Using wavelet analysis, show that represents comprehensive response climatic variations temperature precipitation. We...
The stagnant zones in nested flow systems have been assumed to be critical accumulation of transported matter, such as metallic ions and hydrocarbons drainage basins. However, little quantitative research has devoted prove this assumption. In paper, the transport age mass is used an example demonstrate that matter could accumulate around stagnation points. spatial distribution model analyzed a series basins different depths. We found groundwater local or regional maximum value each point,...
Abstract. Proglacial lakes are good natural laboratories to investigate groundwater and glacier dynamics under current climate conditions explore biogeochemical cycling pristine lake status. This study conducted a series of investigations 222Rn, stable isotopes, nutrients, other hydrogeochemical parameters in Ximen Co Lake, remote proglacial the east Qinghai–Tibet Plateau (QTP). A radon mass balance model was used quantify lacustrine discharge (LGD) lake, leading an LGD estimate 10.3±8.2 mm...
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Discharge characteristics are crucial for detecting changes in hydrological processes.Recently, the river hydrology) Headwater Area of Yellow River (HAYR) has exhibited erratic regimes (e.g., monotonously declining/low/high hydrograph, even with normal precipitation) under effects climate change, permafrost thaw and dam operation.This study integrates hydroclimatic variables (air temperature, precipitation, potential evapotranspiration) anthropogenic operation degradation impact data to...
Abstract Thermal conductivity is a basic parameter of soil heat transferring, playing an important role in many fields including groundwater withdrawal, ground source pump, and storage soils. However, it usually requires lot time efforts to obtain thermal conductivity. To conveniently accurate conductivity, new model describes the relationship between ( λ ) degree saturation S r was proposed this study. Dry dry saturated sat were described using linear expression geometric mean model,...
Abstract Characterization of stable isotope compositions (δ 2 H and δ 18 O) surface water groundwater in a catchment is critical for refining moisture sources establishing modern isotope–elevation relationships paleoelevation reconstructions. There no consensus on the precipitation Yellow River source region during summer season. This study presents O data from 111 samples collected tributaries, mainstream, lakes, across summertime. Measured values tributaries range −13.5‰ to −5.8‰ with an...
Understanding the driving forces for alpine vegetation variations at different permafrost degrading stages is important when Tibetan Plateau experiencing climate warming. We applied modified Frost Number model to simulate frozen ground distributions in and calculated maximum thawing depth by Stefan approach. classified simulated into three subzones: seasonal zone, changing zone. evaluated effects of precipitation, air temperature, on Normalized Difference Vegetation Index (NDVI) subzones...
The normalized difference vegetation index (NDVI) can depict the status of growth and coverage in grasslands, whereas coarse spatial resolution, cloud cover, phenology limit its applicability fine-scale research, especially areas covering various or fragmented landscapes. In this study, a methodology was developed for obtaining 30 m annual maximum NDVI to overcome these shortcomings. First, Landsat simulated by fusing MODIS using enhanced temporal adaptive reflectance fusion model (ESTARFM),...
The eco-environment in the source region of Yellow River western China has been experiencing deterioration past decades. Vegetation affected by climate variables and anthropogenic activities is indicative well-being. To quantify temporal spatial variations vegetation coverage analyse potential causes for variations, we analysed normalized difference index (NDVI), temperature precipitation data from 2000 to 2007. We found that altitude topographic aspects have a strong influence on coverage....
Hydrological responses to climate change are a widely concerning question, particularly for the source region of Yellow River (SRYR), which is sensitive and underlain by frozen ground. In considering impacts on catchment properties, traditional separation approach based Budyko framework was modified identify quantify climatic causes discharge changes. On basis decomposition method, method were used analyse in SRYR. Using observed annual maximum depth (MFD) indicate ground level,...