| 河西走廊下垫面粗糙度实测值与模拟值的差异性分析 |
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| 引用本文： | 胡文超,张文煜,张宇,郭振海,刘欣.河西走廊下垫面粗糙度实测值与模拟值的差异性分析[J].高原气象,2010,29(1):51-55. |
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| 作者姓名： | 胡文超 张文煜 张宇 郭振海 刘欣 |
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| 作者单位： | 1． 甘肃省气象信息与技术装备保障中心， 甘肃 兰州730020;
2． 半干旱气候变化教育部重点实验室/兰州大学 大气科学学院， 甘肃 兰州730000;
3． 中国科学院 大气物理研究所， 北京100029 |
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| 基金项目： | 国家科技基础性工作专项资金项目(2007DKA31700-06-16);;国家重点基础研究发展计划项目(2009CB421402);;甘肃省自然科学基金项目(0710RJZA040)资助 |
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| 摘 要： | 利用甘肃省河西地区17个风塔观测资料和风向风速标准差法,计算了风塔处的下垫面粗糙度,并与中尺度数值模式ARPS中使用的粗糙度参数进行了比较分析。结果表明,数值模式中使用的粗糙度值和实况具有一定差异,其使用的粗糙度定义方案并不能准确地反映出下垫面粗糙度和非均一性特征。差异最大出现在草原下垫面上,可达375%,且差异程度随下垫面植被复杂程度增加。
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| 关 键 词： | 粗糙长度 数值模式 实时资料 差异性分析 |
Variance Analysis on the Simulated and Observed Values of Underlaying Surface Roughness in Gansu Corridor |
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| HU Wen-chao,ZHANG Wen-yu,ZHANG Yu,GUO Zhen-hai,LIU Xin.Variance Analysis on the Simulated and Observed Values of Underlaying Surface Roughness in Gansu Corridor[J].Plateau Meteorology,2010,29(1):51-55. |
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| Authors: | HU Wen-chao ZHANG Wen-yu ZHANG Yu GUO Zhen-hai LIU Xin |
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| Affiliation: | 1. Gansu Meteorological Information & Technology Support Center;Lanzhou 730020;China;2. Key Laboratory for Semi-Arid Climate Change of the Ministry of Education/College of Atmospheric Sciences;Lanzhou University;Lanzhou 730000;3. Institute of Atmoshperic Physics;Chinese Academy of Sciences;Beijing 100029;China |
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| Abstract: | The data from 17 wind towers in Gansu corridor have been utilized to calculate the underlying surface roughness near these wind towers,which have been compared with the roughness used in meso-scale numerical models. The results show that there are some differences between both of them,and the definition in the models can not accurately reflect the roughness and nonuniformity of real underlying surface. The difference between them increases with the vegetation complex degree of underlying surface,and peaks i... |
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| Keywords: | Roughness length Numerical model Real-time data Variance analysis |
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