Thu Aug 14, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Cao, Chunyan, Zhu, Xiaoyu, Liu, Kedi, Liang, Yu, and Ma, Xuanlong, 2025. Satellite-Observed Arid Vegetation Greening and Terrestrial Water Storage Decline in the Hexi Corridor, Northwest China. Remote Sensing, 17(8):1361, doi:10.3390/rs17081361.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025RemS...17.1361C,
author = {{Cao}, Chunyan and {Zhu}, Xiaoyu and {Liu}, Kedi and {Liang}, Yu and {Ma}, Xuanlong},
title = "{Satellite-Observed Arid Vegetation Greening and Terrestrial Water Storage Decline in the Hexi Corridor, Northwest China}",
journal = {Remote Sensing},
keywords = {Hexi Corridor, terrestrial water storage anomaly, EVI, inland river basin, remote sensing, vegetation greening},
year = 2025,
month = apr,
volume = {17},
number = {8},
eid = {1361},
pages = {1361},
abstract = "{The interplay between terrestrial water storage and vegetation dynamics
in arid regions is critical for understanding ecohydrological
responses to climate change and human activities. This study
examines the coupling between total water storage anomaly (TWSA)
and vegetation greenness changes in the Hexi Corridor, an arid
region in northwestern China consisting of three inland river
basins{\textemdash}Shule, Heihe, and Shiyang{\textemdash}from
2002 to 2022. Utilizing TWSA data from GRACE/GRACE-FO satellites
and MODIS Enhanced Vegetation Index (EVI) data, we applied a
trend analysis and partial correlation statistical techniques to
assess spatiotemporal patterns and their drivers across varying
aridity gradients and land cover types. The results reveal a
significant decline in TWSA across the Hexi Corridor (‑0.10
cm/year, p < 0.01), despite a modest increase in precipitation
(1.69 mm/year, p = 0.114). The spatial analysis shows that TWSA
deficits are most pronounced in the northern Shiyang Basin (‑600
to ‑300 cm cumulative TWSA), while the southern Qilian Mountain
regions exhibit accumulation (0 to 800 cm). Vegetation greening
is strongest in irrigated croplands, particularly in arid and
hyper-arid regions of the study area. The partial correlation
analysis highlights distinct drivers: in the wetter semi-humid
and semi-arid regions, precipitation plays a dominant role in
driving TWSA trends. Such a rainfall dominance gives way to
temperature- and human-dominated vegetation greening in the arid
and hyper-arid regions. The decoupling of TWSA and precipitation
highlights the importance of human irrigation activities and the
warming-induced atmospheric water demand in co-driving the TWSA
dynamics in arid regions. These findings suggest that while
irrigation expansion cause satellite-observed greening, it
exacerbates water stress through increased evapotranspiration
and groundwater depletion, particularly in most water-limited
arid zones. This study reveals the complex ecohydrological
dynamics in drylands, emphasizing the need for a holistic view
of dryland greening in the context of global warming, the
escalating human demand of freshwater resources, and the efforts
in achieving sustainable development.}",
doi = {10.3390/rs17081361},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025RemS...17.1361C},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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