DOI: 10.1007/s00382-011-1252-5
Scopus记录号: 2-s2.0-84866379995
论文题名: Global effect of irrigation and its impact on the onset of the Indian summer monsoon
作者: Guimberteau M. ; Laval K. ; Perrier A. ; Polcher J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 6 起始页码: 1329
结束页码: 1348
语种: 英语
英文关键词: Indian monsoon
; Irrigation
; Mississippi
; Onset
; ORCHIDEE
英文摘要: In a context of increased demand for food and of climate change, the water consumptions associated with the agricultural practice of irrigation focuses attention. In order to analyze the global influence of irrigation on the water cycle, the land surface model ORCHIDEE is coupled to the GCM LMDZ to simulate the impact of irrigation on climate. A 30-year simulation which takes into account irrigation is compared with a simulation which does not. Differences are usually not significant on average over all land surfaces but hydrological variables are significantly affected by irrigation over some of the main irrigated river basins. Significant impacts over the Mississippi river basin are shown to be contrasted between eastern and western regions. An increase in summer precipitation is simulated over the arid western region in association with enhanced evapotranspiration whereas a decrease in precipitation occurs over the wet eastern part of the basin. Over the Indian peninsula where irrigation is high during winter and spring, a delay of 6 days is found for the mean monsoon onset date when irrigation is activated, leading to a significant decrease in precipitation during May to July. Moreover, the higher decrease occurs in June when the water requirements by crops are maximum, exacerbating water scarcity in this region. A significant cooling of the land surfaces occurs during the period of high irrigation leading to a decrease of the land-sea heat contrast in June, which delays the monsoon onset. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55184
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratoire de Météorologie Dynamique, Université de Paris 6, Tour 45-55, 3eme et., Case Postale 99, 4, Place Jussieu, 75252 Paris Cedex 05, France; Laboratoire de Météorologie Dynamique, Paris, France; AgroParisTech, UFR Physique de l'Environnement, Paris, France; Laboratoire de Météorologie Dynamique, CNRS, Paris, France
Recommended Citation:
Guimberteau M.,Laval K.,Perrier A.,et al. Global effect of irrigation and its impact on the onset of the Indian summer monsoon[J]. Climate Dynamics,2012-01-01,39(6)