| 一些陆面要素非均匀分布对模式计算结果影响的理论分析 |
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| 引用本文： | 张正秋,周秀骥,李维亮,孙菽芬.一些陆面要素非均匀分布对模式计算结果影响的理论分析[J].应用气象学报,2005,16(5):561-568. |
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| 作者姓名： | 张正秋 周秀骥 李维亮 孙菽芬 |
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| 作者单位： | 1.中国气象科学研究院, 北京100081 |
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| 基金项目： | 国家自然科学基金重点项目(40233034)资助 |
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| 摘 要： | 应用平均参数化方法,从理论上分别研究了地表温度、地面粗糙度、积雪深度和密度非均匀分布对相关物理量计算的影响。结果表明:考虑地表温度的非均匀分布影响后,模式网格上平均地面的长波辐射通量增加,地面饱和水汽压也增加;在相同的地表温度分布变差系数和常温情况下,与长波辐射通量相比,地面饱和水汽压的变化对地表温度非均匀分布较为敏感;地面粗糙度非均匀分布对地面中性曳力系数和BATS型地面积雪覆盖率有一定的影响;积雪深度和密度非均匀分布也对地面积雪覆盖率有一定的影响。
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| 关 键 词： | 陆面要素 非均匀分布 理论分析 |
| 收稿时间： | 2004-04-14 |
| 修稿时间： | 2004-06-08 |
Theoretical Study on Impacts of Some Land Surface Elements Heterogeneities Upon Model Output |
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| Zhang Zhengqiu,Zhou Xiuji,Li Weiliang,Sun Shufen.Theoretical Study on Impacts of Some Land Surface Elements Heterogeneities Upon Model Output[J].Quarterly Journal of Applied Meteorology,2005,16(5):561-568. |
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| Authors: | Zhang Zhengqiu Zhou Xiuji Li Weiliang Sun Shufen |
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| Affiliation: | 1.Chinese Academy of Meteorological Sciences, Beijing1000812.LAS G, Institute of Atmospheric Physics, CAS, Beijing100029 |
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| Abstract: | By means of averaged parameterization,a theoretical study is concerned with influences of the heterogeneous distributions of surface temperature,roughness,snow depth and density on their calculated physical quantities.Results indicate that with the surface temperature heterogeneity taken into account,gridded averaged long wave radiation flux is increased and so is the saturation vapor pressure at surface,which is more sensitive to the temperature inhomogeneity compared to the radiation flux for the same coefficient of variation in the temperature distribution and constant temperature condition;the heterogeneity of surface roughness exerts some impacts on neutral drag coefficient and BATS snow coverage and so does the inhomogeneity of snow depth and density on snow coverage. |
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| Keywords: | Land surface elements Heterogeneous distribution Theoretical study |
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