气候变化领域集成服务门户(CCPortal): Moist heat stress extremes in India enhanced by irrigation

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DOI	10.1038/s41561-020-00650-8
	Moist heat stress extremes in India enhanced by irrigation
	Mishra V.; Ambika A.K.; Asoka A.; Aadhar S.; Buzan J.; Kumar R.; Huber M.
发表日期	2020
ISSN	17520894
起始页码	722
结束页码	728
卷号	13 期号:11
英文摘要	Intensive irrigation in India has been demonstrated to decrease surface temperature, but the influence of irrigation on humidity and extreme moist heat stress is not well understood. Here we analysed a combination of in situ and satellite-based datasets and conducted meteorological model simulations to show that irrigation modulates extreme moist heat. We found that intensive irrigation in the region cools the land surface by 1 °C and the air by 0.5 °C. However, the decreased sensible heat flux due to irrigation reduces the planetary boundary layer height, which increases low-level moist enthalpy. Thus, irrigation increases the specific and relative humidity, which raises the moist heat stress metrics. Intense irrigation over the region results in increased moist heat stress in India, Pakistan, and parts of Afghanistan—affecting about 37–46 million people in South Asia—despite a cooler land surface. We suggest that heat stress projections in India and other regions dominated by semi-arid and monsoon climates that do not include the role of irrigation overestimate the benefits of irrigation on dry heat stress and underestimate the risks. © 2020, The Author(s), under exclusive licence to Springer Nature Limited.
英文关键词	climate modeling; data set; extreme event; heat transfer; in situ measurement; irrigation; land surface; satellite altimetry; satellite data; sensible heat flux; Afghanistan; India; Pakistan
语种	英语
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/206812
作者单位	Civil Engineering, Indian Institute of Technology (IIT), Gandhinagar, India; Earth Sciences, Indian Institute of Technology (IIT), Gandhinagar, India; Earth, Atmospheric, and Planetary Science, Purdue University, West Lafayette, IN, United States; Helmholtz Center for Environmental Research—UFZ, Leipzig, Germany
推荐引用方式 GB/T 7714	Mishra V.,Ambika A.K.,Asoka A.,et al. Moist heat stress extremes in India enhanced by irrigation[J],2020,13(11).
APA	Mishra V..,Ambika A.K..,Asoka A..,Aadhar S..,Buzan J..,...&Huber M..(2020).Moist heat stress extremes in India enhanced by irrigation.Nature Geoscience,13(11).
MLA	Mishra V.,et al."Moist heat stress extremes in India enhanced by irrigation".Nature Geoscience 13.11(2020).