Asian irrigation, African rain: Remote impacts of irrigation

被引:100
作者
de Vrese, Philipp [1 ]
Hagemann, Stefan [1 ]
Claussen, Martin [1 ,2 ]
机构
[1] Max Planck Inst Meteorol, Bundesstr 55, D-20146 Hamburg, Germany
[2] Univ Hamburg, Ctr Earth Syst Res & Sustainabil, Hamburg, Germany
关键词
GREAT-PLAINS IRRIGATION; ATMOSPHERIC MODEL; WATER-VAPOR; LAND; PRECIPITATION; FLUXES;
D O I
10.1002/2016GL068146
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
Irrigation is not only vital for global food security but also constitutes an anthropogenic land use change, known to have strong effects on local hydrological and energy cycles. Using the Max Planck Institute for Meteorology's Earth System Model, we show that related impacts are not confined regionally but that possibly as much as 40% of the present-day precipitation in some of the arid regions in Eastern Africa are related to irrigation-based agriculture in Asia. Irrigation in South Asia also substantially influences the climate throughout Southeast Asia and China via the advection of water vapor and by altering the Asian monsoon. The simulated impact of irrigation on remote regions is sensitive to the magnitude of the irrigation-induced moisture flux. Therefore, it is likely that a future extension or decline of irrigated areas due to increasing food demand or declining fresh water resources will also affect precipitation and temperatures in remote regions.
引用
收藏
页码:3737 / 3745
页数:9
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