干旱区生态环境知识资源中心(Arid): Impact of vegetation greening on carbon and water cycle in the African Sahel-Sudano-Guinean region

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DOI	10.1016/j.gloplacha.2021.103524
	Impact of vegetation greening on carbon and water cycle in the African Sahel-Sudano-Guinean region
	Ogutu, Booker O.; D'Adamo, Francesco; Dash, Jadunandan
通讯作者	Ogutu, BO (corresponding author), Univ Southampton, Sch Geog & Environm Sci, Southampton SO17 1BJ, Hants, England.
来源期刊	GLOBAL AND PLANETARY CHANGE
ISSN	0921-8181
EISSN	1872-6364
出版年	2021
卷号	202
英文摘要	The African Sahel-Sudano-Guinean region is one of the largest water limited environments in the world, thus making it highly vulnerable to climate change. Recent studies have shown vegetation greening in the region, but few have investigated the impact of this greening on carbon and water cycles. We used a combination of earth observation (EO) data and a diagnostic model to evaluate the extent of the vegetation greening and its impacts on carbon sequestration potential (i.e., Gross Primary Productivity-GPP) and the water cycle (i.e., Evapotranspiration-ET and Water Use Efficiency-WUE) from 1982 to 2015. Additionally, we evaluated the influence of key climatic variables (i.e., precipitation, temperature, and solar radiation) on vegetation greening, carbon sequestration potential and the water cycle. Our results showed widespread vegetation greening during the first half of the study period (1982-2000), driven mainly by increase in precipitation. However, the rate of greening reduced or became stagnant during the latter half of the study (2000-2015), but did not revert to pregreening levels of 1980s, implying a persistent ecosystem change. The vegetation greening and increased precipitation resulted in a similar to 17.95% increase in GPP (from similar to 3.9 PgC/year in 1982 to similar to 4.6 PgC/year in 2000) and a similar to 21.28% increase in ET (from similar to 47 mm/year in 1982 to similar to 57 mm/year in 2015). The WUE showed an overall reduction, mainly attributed to large increases in ET not matched by similar magnitude of increases in GPP. Currently, there is lack of consensus on the magnitude of the contribution of drylands to the global carbon and water cycle. This study shows that drylands undergoing ecosystem change, coupled with climate change, may in future become important contributors to the global carbon and water cycle. Therefore, they could play a key role in future global warming and climate change mitigation strategies.
英文关键词	Vegetation greening Water use efficiency Carbon sequestration SCARF model Gross primary productivity
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000659470000004
WOS关键词	GROSS PRIMARY PRODUCTIVITY ; USE EFFICIENCY ; SEMIARID ECOSYSTEMS ; CLIMATE-CHANGE ; DOMINANT ROLE ; GREATER HORN ; TRENDS ; DROUGHT ; DESERTIFICATION ; VARIABILITY
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350439
作者单位	[Ogutu, Booker O.; D'Adamo, Francesco; Dash, Jadunandan] Univ Southampton, Sch Geog & Environm Sci, Southampton SO17 1BJ, Hants, England
推荐引用方式 GB/T 7714	Ogutu, Booker O.,D'Adamo, Francesco,Dash, Jadunandan. Impact of vegetation greening on carbon and water cycle in the African Sahel-Sudano-Guinean region[J],2021,202.
APA	Ogutu, Booker O.,D'Adamo, Francesco,&Dash, Jadunandan.(2021).Impact of vegetation greening on carbon and water cycle in the African Sahel-Sudano-Guinean region.GLOBAL AND PLANETARY CHANGE,202.
MLA	Ogutu, Booker O.,et al."Impact of vegetation greening on carbon and water cycle in the African Sahel-Sudano-Guinean region".GLOBAL AND PLANETARY CHANGE 202(2021).