气候变化领域集成服务门户(CCPortal): Simulating the Climatic Effects of Irrigation Over China by Using the WRF-Noah Model System With Mosaic Approach

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DOI	10.1029/2020JD034428
	Simulating the Climatic Effects of Irrigation Over China by Using the WRF-Noah Model System With Mosaic Approach
	Liu G.; Wang W.; Shao Q.; Wei J.; Zheng J.; Liu B.; Chen Z.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:15
英文摘要	Investigation on the climatic effects of irrigation is of great significance to fully understand the impact of water management on the Earth's environment and hydrological cycle. To comprehensively explore the effects of irrigation across different climatic regions over China, we propose a novel combined irrigation scheme (including dynamic and fixed irrigation schemes) into the Weather Research and Forecasting (WRF)-Noah-mosaic model. Two experiments (with and without irrigation) are designed to simulate the impacts of irrigation over China on regional climate. As irrigation increases the latent heat flux but decreases the sensible heat flux and surface temperature, and the magnitudes of corresponding change are highly dependent on the irrigation amounts and irrigation fraction, the evaporative cooling effects significantly reduce the warm bias over extensive irrigation area during crop growing seasons. Meanwhile, irrigation increases soil moisture during both irrigated and non-irrigated seasons. Compared with the dynamic irrigation scheme, the fixed irrigation scheme results in relatively higher subsurface runoffs due to the continuous infiltration. In addition, the irrigation-induced changes on precipitation during spring (March–May) are weaker than that during summer (June–August). The opposed effects of irrigation cooling and wetting on generating convective precipitation, and the irrigation-induced changes in large-scale circulation jointly give rise to the heterogeneous changes of precipitation. Besides, the subgrid-scale irrigation scheme can capture the climatic effects of irrigation in some grids where the dominant land use types are not cropland, indicating that in mesoscale simulation, climate model coupled with subgrid-scale irrigation scheme may improve climate variables trends attribution studies. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	China; climatic effects; irrigation; Mosaic approach; numerical simulation; WRF
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237084
作者单位	State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing, China; Key Laboratory of Water Big Data Technology of Ministry of Water Resources, Hohai University, Nanjing, China; College of Hydrology and Water Resources, Hohai University, Nanjing, China; CSIRO Data 61, Australian Resources Research Centre, Kensington, WA, Australia; School of Civil Engineering, Sun Yat-sen University, Guangzhou, China
推荐引用方式 GB/T 7714	Liu G.,Wang W.,Shao Q.,et al. Simulating the Climatic Effects of Irrigation Over China by Using the WRF-Noah Model System With Mosaic Approach[J],2021,126(15).
APA	Liu G..,Wang W..,Shao Q..,Wei J..,Zheng J..,...&Chen Z..(2021).Simulating the Climatic Effects of Irrigation Over China by Using the WRF-Noah Model System With Mosaic Approach.Journal of Geophysical Research: Atmospheres,126(15).
MLA	Liu G.,et al."Simulating the Climatic Effects of Irrigation Over China by Using the WRF-Noah Model System With Mosaic Approach".Journal of Geophysical Research: Atmospheres 126.15(2021).