DOI: 10.1002/2015GL065883
论文题名: Potential impacts of wintertime soil moisture anomalies from agricultural irrigation at low latitudes on regional and global climates
作者: Wey H.-W. ; Lo M.-H. ; Lee S.-Y. ; Yu J.-Y. ; Hsu H.-H.
刊名: Geophysical Research Letters
ISSN: 0094-9297
EISSN: 1944-9028
出版年: 2015
卷: 42, 期: 20 起始页码: 8605
结束页码: 8614
语种: 英语
英文关键词: irrigation
; land-air interaction
; teleconnection
Scopus关键词: Atmospheric temperature
; Budget control
; Fighter aircraft
; Forestry
; Moisture
; Soil moisture
; Surface properties
; Water management
; Agricultural irrigation
; Atmospheric circulation
; Atmospheric feedbacks
; Land-sea thermal contrasts
; Monsoon circulations
; Plausible mechanisms
; Surface energy budget
; Teleconnections
; Irrigation
; atmospheric circulation
; climate change
; energy budget
; global climate
; irrigation system
; latitude
; regional climate
; soil moisture
; surface energy
; surface temperature
; teleconnection
; warming
; water budget
; water management
; winter
; Aleutian Basin
; Bering Sea
; Gangetic Plain
; North America
; Pacific Ocean
; Pacific Ocean
英文摘要: Anthropogenic water management can change surface energy budgets and the water cycle. In this study, we focused on impacts of Asian low-latitude irrigation on regional and global climates during boreal wintertime. A state-of-the-art Earth system model is used to simulate the land-air interaction processes affected by irrigation and the consequent responses in atmospheric circulation. Perturbed experiments show that wet soil moisture anomalies at low latitudes can reduce the surface temperature on a continental scale through atmospheric feedback. The intensity of prevailing monsoon circulation becomes stronger because of larger land-sea thermal contrast. Furthermore, anomalous upper level convergence over South Asia and midlatitude climatic changes indicate tropical-extratropical teleconnections. The wintertime Aleutian low is deepened and an anomalous warm surface temperature is found in North America. Previous studies have noted this warming but left it unexplained, and we provide plausible mechanisms for these remote impacts coming from the irrigation over Asian low-latitude regions. Key Points Model simulation without considering irrigation underestimates ET over Indo-Gangetic Plain Irrigation at Asian low latitudes has the potential to induce PNA teleconnection Irrigation results in interhemispheric thermal gradient, thereby modifying Pacific subtropical jet © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946595092&doi=10.1002%2f2015GL065883&partnerID=40&md5=b58ec053f3198e6137d36afa96113a5d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8913
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan
Recommended Citation:
Wey H.-W.,Lo M.-H.,Lee S.-Y.,et al. Potential impacts of wintertime soil moisture anomalies from agricultural irrigation at low latitudes on regional and global climates[J]. Geophysical Research Letters,2015-01-01,42(20).