Review on the Formation and Evolution Mechanisms of Flash Droughts Under Climate and Land Cover Change
In recent years,flash droughts with rapid onset have occurred frequently worldwide,severely impacting society,economy,and the ecological environment.Major progress in the formation and evolution mechanisms of flash droughts has been reviewed.Concludingly,intense precipitation deficits cause flash droughts,whereas increased evapotranspiration accelerates drought onset,further triggering flash droughts.These abnormal meteorological factors are closely associated with sea surface temperature anomalies(such as the El Nino-Southern Oscillation,North Atlantic Tripole,and Indian Ocean Dipole)and their related atmospheric circulation anomalies.In addition,the roles of local and non-local land surface anomalies in the onset and maintenance of flash droughts are important.Moreover,the synergistic effects of climate and land-use change on land-atmosphere-ocean coupling processes make the development of flash droughts more complex and add considerable uncertainty to evolutionary trends.Therefore,future research needs to achieve breakthroughs in several areas,including the large-scale atmospheric circulation background of flash drought onset and maintenance,modulating roles of key land and ocean signals,flash drought-vegetation interactions,and response mechanisms of the variation of flash droughts to climate warming and land cover changes.
NETL
NSTL
万方数据
