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Using a Modified Soil-Plant-Atmosphere Scheme (MSPAS) to study the sensitivity of land surface and boundary layer processes to soil and vegetation conditions

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Abstract

A series of sensitivity tests are performed to test the stability and sensibility of the Modified Soil-Plant-Atmosphere Scheme (MSPAS), which was wholly introduced in a previous paper. The numerical simulation results from the experiments show good agreement with physical reality. Besides, some of the results are illuminating. Together with the first paper, it is concluded that MSPAS is a simple but effective model, and it is practically valuable in the research work of desertification control and reforestation in China.

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Abbreviations

e2 :

turbulence kinetic energy (m2 s−2)

σf :

vegetation fraction

αf :

vegetable albedo (0.20)

αg :

albedo of ground

qa :

specific humidity of the air at the top of canopy (kg kg−1)

qg :

specific humidity of the ground (kg kg−1)

qf :

specific humidity of the surface of foliage (kg kg−1)

qaf :

specific humidity of the atmosphere within canopy (kg kg−1)

Tg :

temperature of the ground (K)

Taf :

temperature of the atmosphere within canopy (K)

w:

velocity of atmosphere in the vertical direction (m2 s−1)

wg :

volume fraction of soil moisture on the ground (m s−1)

w2 :

net volume fraction of soil moisture (m m−1)

wk :

volume of water hold by soil when the surface acts as if it were saturated (m m−1)

wmax :

maximum volume fraction of soil moisture (m m−1)

Wdew :

interception of water on the foliage when raining (kg m−2)

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Authors and Affiliations

  1. Group of Atmosphere Boundary Layer and Turbulence, Laboratory of Severe Storm Research, Department of Atmospheric Sciences, the College of Physics, Peking University, 100871, Bei**g

    Liu Shuhua & Yue Xu

  2. State Key Laboratory of Atmosphere Physics and Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029, Bei**g

    Liu Shuhua, Liu Huizhi & Hu Fei

Authors
  1. Liu Shuhua
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  2. Yue Xu
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  3. Liu Huizhi
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  4. Hu Fei
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Correspondence to Liu Shuhua.

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Shuhua, L., Xu, Y., Huizhi, L. et al. Using a Modified Soil-Plant-Atmosphere Scheme (MSPAS) to study the sensitivity of land surface and boundary layer processes to soil and vegetation conditions. Adv. Atmos. Sci. 21, 717–729 (2004). https://doi.org/10.1007/BF02916369

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  • DOI: https://doi.org/10.1007/BF02916369

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