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Global field observations of tree die-off reveal hotter-drought fingerprint for Earth’s forests

Journal Article · · Nature Communications
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [8];  [9];  [10]
  1. Univ. of Florida, Gainesville, FL (United States). Agronomy Dept.; OSTI
  2. Univ. of California, Los Angeles, CA (United States). Dept. of Geography
  3. Univ. of California, Merced, CA (United States). Management of Complex Systems
  4. Washington State Univ., Pullman, WA (United States). School of the Environment
  5. Weizmann Institute of Science, Rehovot (Israel). Dept. of Plant and Environmental Sciences
  6. Univ. Politecnica de Madrid (Spain). Sistemas y Recuros Naturales
  7. Universidad Michoacana de San Nicolás de Hidalgo, Morelia, Michoacán (Mexico). Instituto de Investigaciones sobre los Recursos Naturales
  8. Max Planck Institute for Biogeochemistry, Jena (Germany). Dept. of Biogeochemical Processes
  9. Univ. of Arizona, Tucson, AZ (United States). School of Natural Resources and the Environment
  10. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Geography and Environmental Studies
Earth’s forests face grave challenges in the Anthropocene, including hotter droughts increasingly associated with widespread forest die-off events. But despite the vital importance of forests to global ecosystem services, their fates in a warming world remain highly uncertain. Lacking is quantitative determination of commonality in climate anomalies associated with pulses of tree mortality—from published, field-documented mortality events—required for understanding the role of extreme climate events in overall global tree die-off patterns. Here we established a geo-referenced global database documenting climate-induced mortality events spanning all tree-supporting biomes and continents, from 154 peer-reviewed studies since 1970. Our analysis quantifies a global “hotter-drought fingerprint” from these tree-mortality sites—effectively a hotter and drier climate signal for tree mortality—across 675 locations encompassing 1,303 plots. Frequency of these observed mortality-year climate conditions strongly increases nonlinearly under projected warming. Our database also provides initial footing for further community-developed, quantitative, ground-based monitoring of global tree mortality.
Research Organization:
Columbia Univ., New York, NY (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Office of Science (SC)
Grant/Contract Number:
SC0022302
OSTI ID:
1904244
Journal Information:
Nature Communications, Journal Name: Nature Communications Journal Issue: 1 Vol. 13; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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