Mon Oct 13, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Feng, Keting, Cao, Yanping, Du, Erji, Zhou, Zengguang, and Zhang, Yaonan, 2025. Spatiotemporal Dynamics of Drought and the Ecohydrological Response in Central Asia. Remote Sensing, 17(1):166, doi:10.3390/rs17010166.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2025RemS...17..166F,
author = {{Feng}, Keting and {Cao}, Yanping and {Du}, Erji and {Zhou}, Zengguang and {Zhang}, Yaonan},
title = "{Spatiotemporal Dynamics of Drought and the Ecohydrological Response in Central Asia}",
journal = {Remote Sensing},
keywords = {GRACE, drought, vegetation, water storage, groundwater},
year = 2025,
month = jan,
volume = {17},
number = {1},
eid = {166},
pages = {166},
abstract = "{Due to the influences of climate change and human activities, the
resources and environments of the ``One Belt and One Road''
initiative are facing severe challenges. Using drought
indicators, this study aimed to analyze the spatiotemporal
characteristics of the drought environment and the response of
vegetation cover in the area to drought conditions. The Gravity
Recovery and Climate Experiment (GRACE) drought severity index
(GRACE-DSI), GRACE water storage deficit index (GRACE-WSDI) and
standardized precipitation index (SPI) were calculated to
measure hydrological drought. Additionally, based on GRACE and
Global Land Data Assimilation System (GLDAS) data, groundwater
data in Central Asia was retrieved to calculate the groundwater
drought index using the GRACE Standardized Groundwater Level
Index (GRACE-SGI). The findings indicate that, from 2000,
Central Asia's annual precipitation decreased at a rate of 1.80
mm/year (p < 0.1), and its annual temperature increased
slightly, at a rate of 0.008 {\textdegree}C/year (p = 0.62).
Water storage decreased significantly at a rate of ‑3.53 mm/year
(p < 0.001) and showed an increase-decrease-increase-decrease
pattern. During the study period, the aridity in Central Asia
deteriorated, especially on the eastern coast of the Caspian Sea
and the Aral Sea basin. After 2020, most of Central Asia
experienced droughts at both the hydrological and groundwater
droughts levels and of varying lengths and severity. During the
growing season, there was a substantial positive association
between the Normalized Difference Vegetation Index (NDVI) and
drought indicators such as GRACE-DSI and GRACE-WSDI.
Nonetheless, the NDVI of cultivated land and grassland
distribution areas in Central Asia displayed a strong negative
correlation with GRACE-SGI. This study concludes that the arid
environment in Central Asia affected the growth of vegetation.
The ecological system in Central Asia may be put under
additional stress if drought conditions continue to worsen. This
paper explores the drought characteristics in Central Asia,
especially those of groundwater drought, and analyzes the
response of vegetation, which is very important for the
ecological and environmental protection of the region.}",
doi = {10.3390/rs17010166},
adsurl = {https://ui.adsabs.harvard.edu/abs/2025RemS...17..166F},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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