| 天气与气候 |
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| Numerical Simulation of Grassland Agricultural-Pastoralization Influencing Climatic Environment in Source Regions of Yellow River |
| LIU Yuan-pu1,2, LU Shi-hua2, LI Suo-suo1,2 |
| 1.Key Laboratory of Arid Climatic Changing and Reducing Disaster of Gansu Province, Key Laboratory of Arid Climatic Changing and Reducing Disaster of CMA, Lanzhou Institute of Arid Meteorology, CMA, Lanzhou 730020, China; 2.Laboratory for Climate Environment and Disasters of Western China, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 7300, China |
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Abstract The mesoscale numerical model MM5 was used to design a control experiment and a sensitive experiment for analyzing the influence of grassland agricultural-pastoralization on climatic environment. Some conclusions have been obtained: under the background of global warming the grassland agricultural-pastoralization brought about the average temperature and the ground temperature ascend, the average daily temperature difference increase in the source regions of Yellow River; the precipitation in agricultural-pastoralization area increased and that in neighboring area decreased; the air humidity and soil moisture decreased obviously; the surface runoff increased and underground runoff reduced; the increased precipitation flowed along with surface runoff; the sensible heat flux increased, the latent heat flux decreased in the agricultural-pastoralization area and the effective thermal fluxes increased. The influence of grassland agricultural-pastoralization on climatic environment in source regions of Yellow River differs from other districts.
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Received: 08 June 2007
Published: 20 July 2008
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2008, Vol. 28 
