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Drought Legacy in Sub-Seasonal Vegetation State and Sensitivity to Climate Over the Northern Hemisphere

Wu, Minchao LU orcid ; Manzoni, Stefano ; Vico, Giulia ; Bastos, Ana ; de Vries, Franciska T. and Messori, Gabriele (2022) In Geophysical Research Letters 49(15).
Abstract

Droughts affect ecosystems at multiple time scales, but their sub-seasonal legacy effects on vegetation activity remain unclear. Combining the satellite-based enhanced vegetation index MODIS EVI with a novel location-specific definition of the growing season, we quantify drought impacts on sub-seasonal vegetation activity and the subsequent recovery in the Northern Hemisphere. Drought legacy effects are quantified as changes in post-drought greenness and sensitivity to climate. We find that greenness losses under severe drought are partially compensated by a ∼+5% greening within 2–6 growing-season months following the droughts, both in woody and herbaceous vegetation but at different timings. In addition, post-drought sensitivity of... (More)

Droughts affect ecosystems at multiple time scales, but their sub-seasonal legacy effects on vegetation activity remain unclear. Combining the satellite-based enhanced vegetation index MODIS EVI with a novel location-specific definition of the growing season, we quantify drought impacts on sub-seasonal vegetation activity and the subsequent recovery in the Northern Hemisphere. Drought legacy effects are quantified as changes in post-drought greenness and sensitivity to climate. We find that greenness losses under severe drought are partially compensated by a ∼+5% greening within 2–6 growing-season months following the droughts, both in woody and herbaceous vegetation but at different timings. In addition, post-drought sensitivity of herbaceous vegetation to hydrological conditions increases noticeably at high latitudes compared with the local normal conditions, regardless of the choice of drought time scales. In general, the legacy effects on sensitivity are larger in herbaceous vegetation than in woody vegetation.

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author
; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
drought legacy, ecosystem resilience, growing season-based analysis, sub-seasonal vegetation sensitivity
in
Geophysical Research Letters
volume
49
issue
15
article number
e2022GL098700
publisher
American Geophysical Union (AGU)
external identifiers
  • scopus:85135806425
ISSN
0094-8276
DOI
10.1029/2022GL098700
language
English
LU publication?
yes
id
9c0d2a07-0f17-4b39-b135-78e9d1dd317a
date added to LUP
2022-10-06 12:14:42
date last changed
2025-04-04 14:09:42
@article{9c0d2a07-0f17-4b39-b135-78e9d1dd317a,
  abstract     = {{<p>Droughts affect ecosystems at multiple time scales, but their sub-seasonal legacy effects on vegetation activity remain unclear. Combining the satellite-based enhanced vegetation index MODIS EVI with a novel location-specific definition of the growing season, we quantify drought impacts on sub-seasonal vegetation activity and the subsequent recovery in the Northern Hemisphere. Drought legacy effects are quantified as changes in post-drought greenness and sensitivity to climate. We find that greenness losses under severe drought are partially compensated by a ∼+5% greening within 2–6 growing-season months following the droughts, both in woody and herbaceous vegetation but at different timings. In addition, post-drought sensitivity of herbaceous vegetation to hydrological conditions increases noticeably at high latitudes compared with the local normal conditions, regardless of the choice of drought time scales. In general, the legacy effects on sensitivity are larger in herbaceous vegetation than in woody vegetation.</p>}},
  author       = {{Wu, Minchao and Manzoni, Stefano and Vico, Giulia and Bastos, Ana and de Vries, Franciska T. and Messori, Gabriele}},
  issn         = {{0094-8276}},
  keywords     = {{drought legacy; ecosystem resilience; growing season-based analysis; sub-seasonal vegetation sensitivity}},
  language     = {{eng}},
  number       = {{15}},
  publisher    = {{American Geophysical Union (AGU)}},
  series       = {{Geophysical Research Letters}},
  title        = {{Drought Legacy in Sub-Seasonal Vegetation State and Sensitivity to Climate Over the Northern Hemisphere}},
  url          = {{http://dx.doi.org/10.1029/2022GL098700}},
  doi          = {{10.1029/2022GL098700}},
  volume       = {{49}},
  year         = {{2022}},
}