| 起沙系数对沙尘数值模拟影响的研究 |
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| 引用本文： | 刘伟东,程丛兰,王迎春,张小玲.起沙系数对沙尘数值模拟影响的研究[J].中国沙漠,2007,27(1):165-169. |
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| 作者姓名： | 刘伟东 程丛兰 王迎春 张小玲 |
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| 作者单位： | 中国气象局北京城市气象研究所,北京,100089 |
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| 基金项目： | 中国科学技术部社会公益研究专项资助项目;北京市科技新星计划(A类) |
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| 摘 要： | 通过综合考虑地表条件,如土地利用、土壤类型、植被覆盖与土壤湿度等,定义了起沙系数,用于改进沙尘数值预报模式中的起沙通量,为沙尘数值预报模式提供客观准确的地面起沙条件,提高了沙尘天气分布预报的准确率\.起沙风系数的引入能够对沙尘数值模拟产生较大的影响,若起沙系数中应用较高精度的土壤水分资料与土壤类型,将能更准确地反映起沙系数的作用。
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| 关 键 词： | 起沙系数 沙尘 数值模拟 |
| 文章编号： | 1000-694X（2007）01-0165-05 |
| 收稿时间： | 2005-07-06 |
| 修稿时间： | 2005-07-062005-10-20 |
Study on Effect of Sand Raising Coefficient to Sandstorm Modification |
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| LIU Wei-dong,CHENG Cong-lan,WANG Ying-chun,ZHANG Xiao-ling.Study on Effect of Sand Raising Coefficient to Sandstorm Modification[J].Journal of Desert Research,2007,27(1):165-169. |
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| Authors: | LIU Wei-dong CHENG Cong-lan WANG Ying-chun ZHANG Xiao-ling |
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| Institution: | Institute of Urban Meteorology of Beijing, China Metrology Administration, Beijing 100089, China |
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| Abstract: | Sandstorm formation needs two necessary conditions: the one is synoptic condition,and the other is land surface condition.Generally,sandstorm numerical model takes land surface into account by using friction velocity to determine sand raising flux.This paper,by synthetically using land surface conditions(such as land use,vegetation classification,soil types and soil moisture) defined sand raising coefficient and improved the sandstorm numerical model of sand raising flux.The result shows that the sand raising coefficient can efficiently improve the forecasting of sandstorm domain and sandstorm concentration. |
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| Keywords: | sand raising coefficient sandstorm numerical simulation |
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