干旱区地膜覆盖农田下垫面对东亚气候效应的数值模拟

doi:10.13866/j.azr.2018.06.13

Abstract

Abstract: As an effective way of farming,plastic film mulching on farmland is widely used in arid and semiarid areas in China. In order to study the climate effect of plastic film mulching on farmland in East Asia,in this research a model of heat-water transfer process on mulched farmland was developed based on carrying out the experimental observation and theoretical research and introducing the mulched farmland module into RegCM 4 and WRF model to carry out a climate simulation experiment in summer for 17 years.The outputted parameters,such as precipitation,soil moisture content,surface soil temperature,sensible heat flux and latent heat flux,were compared by RegCM 4 model with the experimental observation and theoretical value,and the parameters were verified by the outputted results of WRF model.The result showed that,after mulching plastic film,the regional climate model can be used to exactly describe the characteristics of farmland underlying surface.Further comparison revealed that the potential field and wind field could be changed by mulching plastic film through influencing heat and water transfer near surface,and the water vapor transmission was affected,resulting in a reduction of precipitation in northwestern and southwestern parts of China,but an increase of precipitation in southwest China and the Huai River Basin.

Key words: plastic film mulching, RegCM 4.3, WRFV 3.6, numerical simulation, climatic effect, Arid Land

ZHAO Shu-man, ZUO Hong-chao, WEI Xiang-qian, YANG Bin, WU Li-yang, WANG Shi-xin. Numerical Simulation of Climate Effect in East Asia by Plastic Film Mulching Farmland in Arid Area[J].Arid Zone Research, 2018, 35(6): 1363-1372.

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Numerical Simulation of Climate Effect in East Asia by Plastic Film Mulching Farmland in Arid Area

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