气候变化领域集成服务门户(CCPortal): Elucidating observed land surface feedbacks across sub-Saharan Africa

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DOI	10.1007/s00382-019-04730-3
	Elucidating observed land surface feedbacks across sub-Saharan Africa
	Notaro M.; Wang F.; Yu Y.
发表日期	2019
ISSN	0930-7575
起始页码	1741
结束页码	1763
卷号	53 期号:2020-03-04
英文摘要	This study examines the role of terrestrial forcings on the regional climate of sub-Saharan Africa through the application of a multivariate statistical method, stepwise generalized equilibrium feedback assessment, to an array of observational, reanalysis, and remote sensing data products. By applying multiple datasets, data uncertainty and the robustness of assessed land surface feedbacks are considered. The approach from our 2017 study is expanded to decompose the relative contribution of vegetation, soil moisture, and oceanic forcings; investigate the role of evapotranspiration (ET) partitioning in terrestrial feedbacks; and compare land surface feedbacks among four key regions, namely the Sahel, Greater Horn of Africa, West African monsoon region, and Congo. ET partitioning differs notably among sub-Saharan regions and between available observational datasets. Across sub-Saharan Africa as a whole, oceanic and terrestrial forcings impose a relatively comparable impact on year-round atmospheric conditions. The land surface feedbacks are most pronounced across the semi-arid Sahel and Greater Horn of Africa, although with unique seasonality of such feedbacks between regions. Moisture recycling is the dominant mechanism in these regions, with positive soil moisture–vegetation–rainfall feedbacks. The direct feedback of soil moisture anomalies on atmospheric conditions outweighed that of leaf area index anomalies. There is a clear need for more extensive observations of ET, its partitioning, and soil moisture across sub-Saharan Africa, as these data uncertainties propagate into the reliability of assessed soil moisture–ET feedbacks, particularly across the Sahel. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	Africa; Land–atmosphere interactions; Soil moisture feedbacks; Vegetation feedbacks
语种	英语
scopus关键词	climate feedback; climate forcing; evapotranspiration; land surface; multivariate analysis; regional climate; remote sensing; soil moisture; vegetation cover; Sub-Saharan Africa
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/146132
作者单位	Nelson Institute Center for Climatic Research, University of Wisconsin-Madison, 1225 West Dayton Street, Madison, WI 53706, United States; Department of Geography, University of California, Los Angeles, Los Angeles, CA 90095, United States
推荐引用方式 GB/T 7714	Notaro M.,Wang F.,Yu Y.. Elucidating observed land surface feedbacks across sub-Saharan Africa[J],2019,53(2020-03-04).
APA	Notaro M.,Wang F.,&Yu Y..(2019).Elucidating observed land surface feedbacks across sub-Saharan Africa.Climate Dynamics,53(2020-03-04).
MLA	Notaro M.,et al."Elucidating observed land surface feedbacks across sub-Saharan Africa".Climate Dynamics 53.2020-03-04(2019).