Remote Sensing, Journal Year: 2024, Volume and Issue: 16(22), P. 4122 - 4122
Published: Nov. 5, 2024
Flash droughts, characterized by their rapid onset and severe impacts, have critical implications for the ecological environment water resource security. However, inconsistent definitions of flash droughts hindered scientific assessments drought severity, limiting efforts in disaster prevention mitigation. In this study, we propose a new method explicitly characterizing events, with particular emphasis on process soil moisture recovery. The temporal spatial evolution over Yangtze River Basin was analyzed, severity extreme 2022 assessed comparing its characteristics impacts those three typical dry years. Additionally, driving factors were evaluated from multiple perspectives. Results indicate that identification is reasonable reliable. recent years, frequency duration significantly increased, Dongting Lake Poyang basins being particularly affected. Spring summer identified as peak seasons middle reaches most affected spring, while tend to impact entire basin. Compared 2006, 2011, 2013, largest area, highest number grids experiencing two events development rate exceeding 15%. Moreover, heat more than other extending spring fall, especially during July–August. Its driven Western Pacific Subtropical High, which suppressed precipitation elevated temperatures. divergence vapor flux intensified shortages, anomalies latent sensible fluxes increased surface evaporation transfer, further disturbing regional cycle. This study provides valuable insights monitoring early warning context changing climate.
Language: Английский