Global increase in the occurrence and impact of multiyear droughts

• 成果类型: Article
• 署名作者: Chen, Liangzhi; Brun, Philipp; Buri, Pascal; Fatichi, Simone; Gessler, Arthur; McCarthy, Michael James; Pellicciotti, Francesca; Stocker, Benjamin; Karger, Dirk Nikolaus
• 署名单位: Swiss Federal Institutes of Technology Domain; Swiss Federal Institute for Forest, Snow & Landscape Research; National University of Singapore; Swiss Federal Institutes of Technology Domain; ETH Zurich; Institute of Science & Technology - Austria; University of Bern; University of Bern; University of Alaska System; University of Alaska Fairbanks
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8917
• DOI: 10.1126/science.ado4245
• 发表日期: 2025-01-17
• 页码: 278-284
• 关键词: leaf-area index; functional composition; primary productivity; vegetation indexes; tropical forests; tree mortality; CLIMATE-CHANGE; precipitation; resilience; ecosystems

摘要

Persistent multiyear drought (MYD) events pose a growing threat to nature and humans in a changing climate. We identified and inventoried global MYDs by detecting spatiotemporally contiguous climatic anomalies, showing that MYDs have become drier, hotter, and led to increasingly diminished vegetation greenness. The global terrestrial land affected by MYDs has increased at a rate of 49,279 14,771 square kilometers per year from 1980 to 2018. Temperate grasslands have exhibited the greatest declines in vegetation greenness during MYDs, whereas boreal and tropical forests have had comparably minor responses. With MYDs becoming more common, this global quantitative inventory of the occurrence, severity, trend, and impact of MYDs provides an important benchmark for facilitating more effective and collaborative preparedness toward mitigation of and adaptation to such extreme events.