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Summer soil drying exacerbated by earlier spring greening of northern vegetation

Science advances, 2020-01, Vol.6 (1), p.eaax0255-eaax0255 [Peer Reviewed Journal]

Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). ;Distributed under a Creative Commons Attribution 4.0 International License ;Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). 2020 The Authors ;ISSN: 2375-2548 ;EISSN: 2375-2548 ;DOI: 10.1126/sciadv.aax0255 ;PMID: 31922002

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Title:
Summer soil drying exacerbated by earlier spring greening of northern vegetation
Author: Lian, Xu ; Piao, Shilong ; Li, Laurent Z X ; Li, Yue ; Huntingford, Chris ; Ciais, Philippe ; Cescatti, Alessandro ; Janssens, Ivan A ; Peñuelas, Josep ; Buermann, Wolfgang ; Chen, Anping ; Li, Xiangyi ; Myneni, Ranga B ; Wang, Xuhui ; Wang, Yilong ; Yang, Yuting ; Zeng, Zhenzhong ; Zhang, Yongqiang ; McVicar, Tim R
Subjects: Climatology ; Earth Sciences ; Ecology ; Environmental Studies ; SciAdv r-articles ; Sciences of the Universe
Is Part Of: Science advances, 2020-01, Vol.6 (1), p.eaax0255-eaax0255
Description: 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.
Publisher: United States: American Association for the Advancement of Science (AAAS)
Language: English
Identifier: ISSN: 2375-2548
EISSN: 2375-2548
DOI: 10.1126/sciadv.aax0255
PMID: 31922002
Source: Hyper Article en Ligne (HAL) (Open Access)
PubMed Central
DOAJ Directory of Open Access Journals

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Summer soil drying exacerbated by earlier spring greening of northern vegetation

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