气候变化领域集成服务门户(CCPortal): Below-surface water mediates the response of African forests to reduced rainfall

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DOI	10.1088/1748-9326/ab724a
	Below-surface water mediates the response of African forests to reduced rainfall
	Madani N.; Kimball J.S.; Parazoo N.C.; Ballantyne A.P.; Tagesson T.; Jones L.A.; Reichle R.H.; Palmer P.I.; Velicogna I.; Bloom A.A.; Saatchi S.; Liu Z.; Geruo A.
发表日期	2020
ISSN	17489318
卷号	15 期号:3
英文摘要	Terrestrial ecosystem gross primary productivity (GPP) is the largest land-atmosphere carbon flux and the primary mechanism of photosynthetic fixation of atmospheric CO2 into plant biomass. Anomalous rainfall events have been shown to have a great impact on the global carbon cycle. However, less is known about the impact of these events on GPP, especially in Africa, where in situ observations are sparse. Here, we use a suite of satellite and other geospatial data to examine the responses of major ecosystems in Africa to anomalous rainfall events from 2003 to 2017. Our results reveal that higher-than-average groundwater storage in tropical ecosystems offsets the rainfall deficit during the dry years. While the inter-annual variations in GPP in semi-arid ecosystems are controlled by near surface soil water, deeper soil moisture and groundwater control the inter-annual variability of the GPP in dense tropical forests. Our study highlights the critical role of groundwater in buffering rainfall shortages and continued availability of near-surface water to plants through dry spells. © 2020 The Author(s). Published by IOP Publishing Ltd.
英文关键词	GPP; groundwater; SIF; soil moisture
语种	英语
scopus关键词	Carbon; Digital storage; Ecosystems; Forestry; Groundwater; Moisture control; Rain; Soil moisture; Tropics; Water conservation; Gross primary productivity; Groundwater storage; In-situ observations; Interannual variability; Interannual variation; Photosynthetic fixation; Semi-arid ecosystems; Terrestrial ecosystems; Surface waters; buffering; forest ecosystem; groundwater control; groundwater resource; net primary production; rainfall; reduction; satellite altimetry; soil moisture; Africa
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154152
作者单位	Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, United States; Numerical Terradynamic Simulation Group, W.A. Franke College of Forestry and Conservation, University of Montana, Missoula, MT 59812, United States; Department of Ecosystem and Conservation Sciences, W.A. Franke College of Forestry and Conservation, University of Montana, Missoula, MT 59812, United States; Department of Physical Geography and Ecosystem Science, Lund University, Sölvegatan 12, Lund, SE-223 62, Sweden; Global Modeling and Assimilation Office, NASA Goddard Space Flight Center, Greenbelt, MD 20771, United States; National Centre for Earth Observation, School of GeoSciences, University of Edinburgh, Edinburgh, EH9 3FF, United Kingdom; Department of Earth System Science, University of California, Irvine, CA 92697, United States
推荐引用方式 GB/T 7714	Madani N.,Kimball J.S.,Parazoo N.C.,et al. Below-surface water mediates the response of African forests to reduced rainfall[J],2020,15(3).
APA	Madani N..,Kimball J.S..,Parazoo N.C..,Ballantyne A.P..,Tagesson T..,...&Geruo A..(2020).Below-surface water mediates the response of African forests to reduced rainfall.Environmental Research Letters,15(3).
MLA	Madani N.,et al."Below-surface water mediates the response of African forests to reduced rainfall".Environmental Research Letters 15.3(2020).