THEORETICAL STUDY ON IMPACTS OF SOME LAND SURFACE ELEMENTS HETEROGENEITIES UPON MODEL OUTPUT

Zhang Zhengqiu; Zhou Xiuji; Li Weiliang; Sun Shufen

Vol.16, NO.5, 2005

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(5): 561-568

Zhang Zhengqiu, Zhou Xiuji, Li Weiliang, et al. Theoretical study on impacts of some land surface elements heterogeneities upon model output. J Appl Meteor Sci, 2005, 16(5): 561-568.

Citation:

Zhang Zhengqiu, Zhou Xiuji, Li Weiliang, et al. Theoretical study on impacts of some land surface elements heterogeneities upon model output. J Appl Meteor Sci, 2005, 16(5): 561-568.

Zhang Zhengqiu, Zhou Xiuji, Li Weiliang, et al. Theoretical study on impacts of some land surface elements heterogeneities upon model output. J Appl Meteor Sci, 2005, 16(5): 561-568.

Citation:

Zhang Zhengqiu, Zhou Xiuji, Li Weiliang, et al. Theoretical study on impacts of some land surface elements heterogeneities upon model output. J Appl Meteor Sci, 2005, 16(5): 561-568.

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THEORETICAL STUDY ON IMPACTS OF SOME LAND SURFACE ELEMENTS HETEROGENEITIES UPON MODEL OUTPUT

1.
Chinese Academy of Meteorological Sciences, Beijing100081
2.
LAS G, Institute of Atmospheric Physics, CAS, Beijing100029

Received Date: 2004-04-14
Rev Recd Date: 2004-06-08
Publish Date: 2005-10-31

Abstract

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 w ave radiation flux is increased and so is the saturation vapor pressure at surface, which is mo re 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 exert s some impacts on neutral drag coefficient and BATS snow coverage and so does the inhomogeneity of snow depth and density on snow coverage .Key
- Land surface elements;
- Heterogeneous distribution;
- Theoretical study

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References(14)

Figures and Tables

图 1 考虑地表温度非均匀分布影响后,χ_e与平均地表温度之间的关系

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图 2 地表温度分布变差系数与地面饱和水汽压之间的关系

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图 3 考虑地表粗糙度非均匀分布影响后,χ_z与Z₀之间的关系

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图 4 地表粗糙度长度分布变差系数与中性曳力系数之间的关系

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图 5 由随机函数产生的地表温度均方差与平均值之间的关系

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图 6 地表温度非均匀分布对模式中地面饱和水汽压计算结果的影响

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References

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