气候变化领域集成服务门户(CCPortal): Drought impacts on terrestrial primary production underestimated by satellite monitoring

CCPortal

DOI	10.1038/s41561-019-0318-6
	Drought impacts on terrestrial primary production underestimated by satellite monitoring
	Stocker B.D.; Zscheischler J.; Keenan T.F.; Prentice I.C.; Seneviratne S.I.; Peñuelas J.
发表日期	2019
ISSN	17520894
EISSN	1752-0908
卷号	12 期号:4 页码:264-+
英文摘要	Satellite retrievals of information about the Earth’s surface are widely used to monitor global terrestrial photosynthesis and primary production and to examine the ecological impacts of droughts. Methods for estimating photosynthesis from space commonly combine information on vegetation greenness, incoming radiation, temperature and atmospheric demand for water (vapour-pressure deficit), but do not account for the direct effects of low soil moisture. They instead rely on vapour-pressure deficit as a proxy for dryness, despite widespread evidence that soil moisture deficits have a direct impact on vegetation, independent of vapour-pressure deficit. Here, we use a globally distributed measurement network to assess the effect of soil moisture on photosynthesis, and identify a common bias in an ensemble of satellite-based estimates of photosynthesis that is governed by the magnitude of soil moisture effects on photosynthetic light-use efficiency. We develop methods to account for the influence of soil moisture and estimate that soil moisture effects reduce global annual photosynthesis by ~15%, increase interannual variability by more than 100% across 25% of the global vegetated land surface, and amplify the impacts of extreme events on primary production. These results demonstrate the importance of soil moisture effects for monitoring carbon-cycle variability and drought impacts on vegetation productivity from space. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
WOS研究方向	Geology
scopus关键词	drought stress; ecological impact; irradiation; photosynthesis; primary production; satellite altimetry; soil moisture; vapor pressure; vegetation structure
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/96207
作者单位	Global Ecology Unit, CREAF, Bellaterra (Cerdanyola del Vallès), Catalonia, Spain; Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland; Earth and Environmental Sciences Area, Lawrence Berkeley National, Lab, Berkeley, CA, United States; Department of Environmental Science, Policy and Management, UC Berkeley, Berkeley, CA, United States; Biosphere and Climate Impacts, Department of Life Sciences, Imperial College London, Ascot, United Kingdom; CSIC, Global Ecology Unit CREAF-CSIC-UAB, Bellaterra, Spain; Climate and Environmental Physics, University of Bern, Bern, Switzerland
推荐引用方式 GB/T 7714	Stocker B.D.,Zscheischler J.,Keenan T.F.,et al. Drought impacts on terrestrial primary production underestimated by satellite monitoring[J],2019,12(4):264-+.
APA	Stocker B.D.,Zscheischler J.,Keenan T.F.,Prentice I.C.,Seneviratne S.I.,&Peñuelas J..(2019).Drought impacts on terrestrial primary production underestimated by satellite monitoring.Nature Geoscience,12(4),264-+.
MLA	Stocker B.D.,et al."Drought impacts on terrestrial primary production underestimated by satellite monitoring".Nature Geoscience 12.4(2019):264-+.