| CHARACTERISTICS OF VEGETATION COVER,ROUGHNESS AND ALBEDO DISTRIBUTION OVER CHINA |
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| 作者姓名： | 张正秋 周秀骥 李维亮 徐兴奎 |
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| 作者单位： | Geophysics Department Peking University.Beijing 100871，Chinese Academy of Meteorological Sciences，Beijing 100081，Chinese Academy of Meteorological Sciences，Beijing 100081，Institute of Atmospheric Physics，Chinese Academy of Sciences，Beijing 100101 |
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| 基金项目： | Supported by No.02 sub-subject in China short-term climate prediction system research—the National Key Science Project of The Ninth Five-Year Plan. |
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| 摘 要： | To build land surface dataset for climate model,with application of remote sensing techniqueas well as the Geographic Information System(GIS),the data of surface type,roughness andalbedo over China in 1997 were retrieved,resolutions being 10 km×10 km.Based on these data,an analysis is conducted on the geographic distributions and seasonal variations of surfacevegetation cover and roughness as well as albedo over China.Results show that surface vegetationcover is mainly located to the south of Yangtze River,in Southwest and Northeast China andsparse vegetation cover is in the Northwest.The variation of land surface cover affects thevariations of land surface roughness and albedo.High albedo occurred in the north of XinjiangAutonomous Region,the north of Northeast China and the Qinghai-Xizang Plateau in winter,incorrespondence with the location of snow cover.For most part of China,surface roughness decreases and albedo increases in winter,while theroughness increases and the albedo decreases in summer,which could mainly result from landsurface cover(snow cover and vegetation cover)and soil moisture changes.This shows that thegeographic distribution and seasonal variation of the albedo are almost opposite to those of theroughness,in agreement with theoretical results.Temporally,the amplitude of surface roughnesschange is quite small in comparison with the roughness itself.
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CHARACTERISTICS OF VEGETATION COVER,ROUGHNESS AND ALBEDO DISTRIBUTION OVER CHINA |
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| ZHANG Zhengqiu Geophysics.CHARACTERISTICS OF VEGETATION COVER,ROUGHNESS AND ALBEDO DISTRIBUTION OVER CHINA[J].Acta Meteorologica Sinica,2001(1). |
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| Authors: | ZHANG Zhengqiu Geophysics |
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| Institution: | ZHANG Zhengqiu Geophysics Department,Peking University.Beijing 100871ZHOU Xiuji LI Weiliang Chinese Academy of Meteorological Sciences,Beijing 100081XU Xingkui Institute of Atmospheric Physics.Chinese Academy of Sciences,Beijing 100101 |
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| Abstract: | |
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| Keywords: | vegetation cover albedo roughness characteristics |
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