The detection and attribution of extreme reductions in vegetation growth across the global land surface

Yang, Hui; Munson, Seth M.; Huntingford, Chris ORCID:; Carvalhais, Nuno; Knapp, Alan K.; Li, Xiangyi; Peñuelas, Josep; Zscheischler, Jakob; Chen, Anping. 2023 The detection and attribution of extreme reductions in vegetation growth across the global land surface. Global Change Biology, 29 (8). 2351-2362.

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Negative extreme anomalies in vegetation growth (NEGs) usually indicate severely impaired ecosystem services. These NEGs can result from diverse natural and anthropogenic causes, especially climate extremes (CEs). However, the relationship between NEGs and many types of CEs remains largely unknown at regional and global scales. Here, with satellite-derived vegetation index data and supporting tree-ring chronologies, we identify periods of NEGs from 1981 to 2015 across the global land surface. We find 70% of these NEGs are attributable to five types of CEs and their combinations, with compound CEs generally more detrimental than individual ones. More importantly, we find that dominant CEs for NEGs vary by biome and region. Specifically, cold and/or wet extremes dominate NEGs in temperate mountains and high latitudes, whereas soil drought and related compound extremes are primarily responsible for NEGs in wet tropical, arid and semi-arid regions. Key characteristics (e.g., the frequency, intensity and duration of CEs, and the vulnerability of vegetation) that determine the dominance of CEs are also region- and biome-dependent. For example, in the wet tropics, dominant individual CEs have both higher intensity and longer duration than non-dominant ones. However, in the dry tropics and some temperate regions, a longer CE duration is more important than higher intensity. Our work provides the first global accounting of the attribution of NEGs to diverse climatic extremes. Our analysis has important implications for developing climate-specific disaster prevention and mitigation plans among different regions of the globe in a changing climate.

Item Type: Publication - Article
Digital Object Identifier (DOI):
UKCEH and CEH Sections/Science Areas: Hydro-climate Risks (Science Area 2017-)
ISSN: 1354-1013
Additional Information. Not used in RCUK Gateway to Research.: Open Access paper - full text available via Official URL.
Additional Keywords: climate extremes, coincidence analysis, drought, flood, frost, heatwave, vegetation growth anomaly
NORA Subject Terms: Ecology and Environment
Data and Information
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Date made live: 10 Jul 2023 12:24 +0 (UTC)

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