期刊
SCIENCE ADVANCES
卷 6, 期 24, 页码 -出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.aba2724
关键词
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资金
- GENCI-TGCC [2018-A0050106328]
- European Union's Horizon 2020 research and innovation program [821003]
- SNSF [20020_172476]
- Helmholtz Association in its ATMO program
- US Department of Energy [DE-SC0016323]
- U.S. Department of Energy (DOE) [DE-SC0016323] Funding Source: U.S. Department of Energy (DOE)
- H2020 Societal Challenges Programme [821003] Funding Source: H2020 Societal Challenges Programme
In summer 2018, central and northern Europe were stricken by extreme drought and heat (DH2018). The DH2018 differed from previous events in being preceded by extreme spring warming and brightening, but moderate rainfall deficits, yet registering the fastest transition between wet winter conditions and extreme summer drought. Using 11 vegetation models, we show that spring conditions promoted increased vegetation growth, which, in turn, contributed to fast soil moisture depletion, amplifying the summer drought. We find regional asymmetries in summer ecosystem carbon fluxes: increased (reduced) sink in the northern (southern) areas affected by drought. These asymmetries can be explained by distinct legacy effects of spring growth and of water-use efficiency dynamics mediated by vegetation composition, rather than by distinct ecosystem responses to summer heat/drought. The asymmetries in carbon and water exchanges during spring and summer 2018 suggest that future land-management strategies could influence patterns of summer heat waves and droughts under long-term warming.
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