Satellite-Observed Arid Vegetation Greening and Terrestrial Water Storage Decline in the Hexi Corridor, Northwest China DOI Creative Commons

Chunyan Cao,

Xiaoyu Zhu,

Kedi Liu

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(8), P. 1361 - 1361

Published: April 11, 2025

The interplay between terrestrial water storage and vegetation dynamics in arid regions is critical for understanding ecohydrological responses to climate change human activities. This study examines the coupling total anomaly (TWSA) greenness changes Hexi Corridor, an region northwestern China consisting of three inland river basins—Shule, Heihe, Shiyang—from 2002 2022. Utilizing TWSA data from GRACE/GRACE-FO satellites MODIS Enhanced Vegetation Index (EVI) data, we applied a trend analysis partial correlation statistical techniques assess spatiotemporal patterns their drivers across varying aridity gradients land cover types. results reveal significant decline Corridor (−0.10 cm/year, p < 0.01), despite modest increase precipitation (1.69 mm/year, = 0.114). spatial shows that deficits are most pronounced northern Shiyang Basin (−600 −300 cm cumulative TWSA), while southern Qilian Mountain exhibit accumulation (0 800 cm). greening strongest irrigated croplands, particularly hyper-arid area. highlights distinct drivers: wetter semi-humid semi-arid regions, plays dominant role driving trends. Such rainfall dominance gives way temperature- human-dominated regions. decoupling importance irrigation activities warming-induced atmospheric demand co-driving These findings suggest expansion cause satellite-observed greening, it exacerbates stress through increased evapotranspiration groundwater depletion, water-limited zones. reveals complex drylands, emphasizing need holistic view dryland context global warming, escalating freshwater resources, efforts achieving sustainable development.

Language: Английский

Satellite-Observed Arid Vegetation Greening and Terrestrial Water Storage Decline in the Hexi Corridor, Northwest China DOI Creative Commons

Chunyan Cao,

Xiaoyu Zhu,

Kedi Liu

et al.

Remote Sensing, Journal Year: 2025, Volume and Issue: 17(8), P. 1361 - 1361

Published: April 11, 2025

The interplay between terrestrial water storage and vegetation dynamics in arid regions is critical for understanding ecohydrological responses to climate change human activities. This study examines the coupling total anomaly (TWSA) greenness changes Hexi Corridor, an region northwestern China consisting of three inland river basins—Shule, Heihe, Shiyang—from 2002 2022. Utilizing TWSA data from GRACE/GRACE-FO satellites MODIS Enhanced Vegetation Index (EVI) data, we applied a trend analysis partial correlation statistical techniques assess spatiotemporal patterns their drivers across varying aridity gradients land cover types. results reveal significant decline Corridor (−0.10 cm/year, p < 0.01), despite modest increase precipitation (1.69 mm/year, = 0.114). spatial shows that deficits are most pronounced northern Shiyang Basin (−600 −300 cm cumulative TWSA), while southern Qilian Mountain exhibit accumulation (0 800 cm). greening strongest irrigated croplands, particularly hyper-arid area. highlights distinct drivers: wetter semi-humid semi-arid regions, plays dominant role driving trends. Such rainfall dominance gives way temperature- human-dominated regions. decoupling importance irrigation activities warming-induced atmospheric demand co-driving These findings suggest expansion cause satellite-observed greening, it exacerbates stress through increased evapotranspiration groundwater depletion, water-limited zones. reveals complex drylands, emphasizing need holistic view dryland context global warming, escalating freshwater resources, efforts achieving sustainable development.

Language: Английский

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