The Role of Climate and Vegetation in Regulating Drought-Heat Extremes
- 주제(키워드) Atmosphere-land interaction , Drought , Extreme events , Hydrometeorology
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- OA유형 hybrid
- 발행기관 American Meteorological Society
- 발행년도 2022
- URI http://www.dcollection.net/handler/ewha/000000194535
- 본문언어 영어
- Published As https://doi.org/10.1175/JCLI-D-21-0675.1
초록/요약
Droughts cause serious environmental and societal impacts, often aggravated by simultaneously occurring heat waves. Climate and vegetation play key roles in the evolution of drought-associated temperature anomalies, but their relative importance is largely unknown. Here, we present the hottest temperature anomalies during drought in subhumid and tree-dominated regions using observation-based, global data over 2001-15. These anomalies are mainly driven by a drought-related net radiation surplus and further amplified by forests' water-saving strategies that result in diminished evaporative cooling. By contrast, in semiarid and short-vegetation regions, drought-related temperature increases are smaller. The reduction of evaporative cooling is weak and net radiation increases only marginally due to high albedo over drought-stressed vegetation. Our findings highlight the importance of considering all interacting factors in understanding diverse mechanisms of concurrent drought-heat extremes across different climate regimes. © 2022 American Meteorological Society. All rights reserved.
more