Summer soil drying exacerbated by earlier spring greening of northern vegetation
Lian, Xu (Sino-French Institute for Earth System Science)
Piao, Shilong (Sino-French Institute for Earth System Science)
Li, Laurent Z. X. (Sorbonne Université. Laboratoire de Météorologie Dynamique)
Li, Yue (Sino-French Institute for Earth System Science)
Huntingford, Chris (Centre for Ecology and Hydrology (Wallingford, Regne Unit))
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement)
Cescatti, Alessandro (European Commission, Joint Research Centre (Ispra, Itàlia))
Janssens, Ivan (University of Antwerp. Department of Biology)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Buermann, Wolfgang (University of Augsburg. Department of Geography)
Chen, Anping (Purdue University. Department of Forestry and Natural Resources)
Li, Xiangyi (Sino-French Institute for Earth System Science)
Myneni, Ranga B. (Boston University. Department of Earth and Environment)
Wang, Xuhui (Sino-French Institute for Earth System Science)
Wang, Yilong (Laboratoire des Sciences du Climat et de l'Environnement)
Yang, Yuting (Tsinghua University. Department of Hydraulic Engineering)
Zeng, Zhenzhong (Sino-French Institute for Earth System Science)
Zhang, Yongqiang (Chinese Academy of Sciences. Institute of Geographic Sciences and Natural Resources Research)
McVicar, Tim R. (CSIRO Land and Water)

Data:	2020
Resum:	Earlier vegetation greening under climate change raises evapotranspiration and thus lowers spring soil moisture, yet the extent and magnitude of this water deficit persistence into the following summer remain elusive. We provide observational evidence that increased foliage cover over the Northern Hemisphere, during 1982-2011, triggers an additional soil moisture deficit that is further carried over into summer. Climate model simulations independently support this and attribute the driving process to be larger increases in evapotranspiration than in precipitation. This extra soil drying is projected to amplify the frequency and intensity of summer heatwaves. Most feedbacks operate locally, except for a notable teleconnection where extra moisture transpired over Europe is transported to central Siberia. Model results illustrate that this teleconnection offsets Siberian soil moisture losses from local spring greening. Our results highlight that climate change adaptation planning must account for the extra summer water and heatwave stress inherited from warming-induced earlier greening.
Ajuts:	European Commission 610028
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Science advances, Vol. 6, issue 1 (Jan. 2020) , art. eaax0255, ISSN 2375-2548

DOI: 10.1126/sciadv.aax0255
PMID: 31922002

12 p, 1.9 MB

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