DOI: 10.1038/s41561-020-00650-8
论文题名: Moist heat stress extremes in India enhanced by irrigation
作者: Mishra V. ; Ambika A.K. ; Asoka A. ; Aadhar S. ; Buzan J. ; Kumar R. ; Huber M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 11 起始页码: 722
结束页码: 728
语种: 英语
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169648
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
Mishra V.,Ambika A.K.,Asoka A.,et al. Moist heat stress extremes in India enhanced by irrigation[J]. Nature Geoscience,2020-01-01,13(11)