Differential impact of flash droughts on water use efficiency in terrestrial ecosystems in Central Asia

Yanchao Zhu, Peng Yang (), Jun Xia, Heqing Huang (), Yaning Chen, Lanhai Li, Kaiya Sun, Jingxia Song, Xiaorui Shi and Xixi Lu
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Yanchao Zhu: China University of Geosciences
Peng Yang: China University of Geosciences
Jun Xia: Wuhan University
Heqing Huang: China University of Geosciences
Yaning Chen: Chinese Academy of Sciences
Lanhai Li: Chinese Academy of Sciences
Kaiya Sun: China University of Geosciences
Jingxia Song: China University of Geosciences
Xiaorui Shi: China University of Geosciences
Xixi Lu: National University of Singapore

Climatic Change, 2025, vol. 178, issue 3, No 20, 20 pages

Abstract: Abstract In the context of climate warming, the rising risk of flash droughts in Central Asia (CA) remains inadequately understood in terms of their specific impacts on diverse regional ecosystems. Hence, this study employs the Evaporative Demand Drought Index (EDDI) and the rate of soil moisture (SM) intensification to identify varying evaporative demand flash droughts (EDFD) and SM flash droughts (SMFD) in CA. It analyzed spatiotemporal patterns and trends of eco-hydrological factors (e.g., SM, potential evapotranspiration (PET), actual evapotranspiration (AET), gross primary productivity (GPP), and water use efficiency (WUE)), explored the characteristics of flash droughts, and examined the differential responses of WUE to flash droughts across different terrestrial ecosystems in CA. The findings indicated that: (1) SM was notably higher in the western and southeastern CA, with a significant upward trend in the northwestern and central-eastern CA. GPP and WUE significantly increased in central-eastern and southwestern CA (p

Keywords: Flash drought; Climate change; Evaporative demand flash drought; Water use efficiency; Central Asia (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1007/s10584-025-03894-8

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