气候变化领域集成服务门户(CCPortal): Anthropogenic Influences Alter the Response and Seasonality of Evapotranspiration: A Case Study Over Two High Mountain Asia Basins

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DOI	10.1029/2023GL107182
	Anthropogenic Influences Alter the Response and Seasonality of Evapotranspiration: A Case Study Over Two High Mountain Asia Basins
	Maina, Fadji Z.; Kumar, Sujay V.
发表日期	2024
ISSN	0094-8276
EISSN	1944-8007
起始页码	51
结束页码	2
卷号	51 期号:2
英文摘要	Earth's vegetation has been increasing over the past decades, altering water and energy cycles by changing evapotranspiration (ET). Greening, caused by climatic and anthropogenic factors, has high rates in High Mountain Asia (HMA). Here we focus on two HMA basins (the Yangtze and the Ganges-Brahmaputra) to contrast the impacts of climate- and human-induced greening on ET. Though the rate of greening is similar in both basins, anthropogenic influences lead to dissimilar responses in ET. In the Yangtze, climate-induced greening increases ET, with the increase in moisture being high enough to meet the ET demand. In the Ganges-Brahmaputra, irrigation-induced greening does not alter annual ET, only pre-monsoon ET increases. The dry season declines in water storage due to pumping decrease ET, while laboriously meeting the demand. This study provides a representative example of the contrasting influences of climate induced and anthropogenic driven processes on the seasonality of ET. The significant increases in vegetation occurring on Earth are susceptible to altering the climate by affecting evapotranspiration. However, the responses in evapotranspiration to the changes in vegetation depend on the drivers of greening. Here we use High Mountain Asia as a testbed to contrast the impacts of greening on evapotranspiration. Irrigation-induced greening leads to an increase in transpiration and evapotranspiration in the pre-monsoon. However, because irrigation decreases water storage it decreases evapotranspiration in the post-monsoon. Climate-induced greening, on the contrary, increases both evapotranspiration and water storage. Climate and human induced greening have different effects on evapotranspiration and therefore the land-atmosphere interactionsThough irrigation-induced greening rises pre-monsoon evapotranspiration, the latter decreases in post-monsoon due to groundwater depletionClimate-induced greening increases evapotranspiration because the energy demand is easily met
英文关键词	HIGH Mountain Asia; greening; evapotranspiration; irrigation; warming; climate change
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001144724500001
来源期刊	GEOPHYSICAL RESEARCH LETTERS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301782
作者单位	National Aeronautics & Space Administration (NASA); NASA Goddard Space Flight Center; University System of Maryland; University of Maryland Baltimore
推荐引用方式 GB/T 7714	Maina, Fadji Z.,Kumar, Sujay V.. Anthropogenic Influences Alter the Response and Seasonality of Evapotranspiration: A Case Study Over Two High Mountain Asia Basins[J],2024,51(2).
APA	Maina, Fadji Z.,&Kumar, Sujay V..(2024).Anthropogenic Influences Alter the Response and Seasonality of Evapotranspiration: A Case Study Over Two High Mountain Asia Basins.GEOPHYSICAL RESEARCH LETTERS,51(2).
MLA	Maina, Fadji Z.,et al."Anthropogenic Influences Alter the Response and Seasonality of Evapotranspiration: A Case Study Over Two High Mountain Asia Basins".GEOPHYSICAL RESEARCH LETTERS 51.2(2024).