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高 原 气 象 41 卷
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A Simulation Study on Soil Parameterization Scheme of Seasonally
Frozen Ground Regions based on CLM4.5

FU Chunwei 1，2，3 ，HU Zeyong ，LU Shan 1，2，3，4 ，WU Di 1，2，3 ，FAN Weiwei 1，2，3
1，2
（1. Key laboratory of Land Surface Process and Climate Change in Cold and Arid Regions，Northwest Institute of
Eco-Environment and Resources，Chinese Academy of Sciences，Lanzhou 730000，Gansu，China；
2. Center for Excellence in Tibetan Plateau Earth Science，Chinese Academy of Science，Beijing 100101，China；
3. University of Chinese Academy of Sciences，Beijing 100049，China；
4. Shaanxi Meteorological Service Center，Xi’an 710014，Shaanxi，China）

Abstract：In this paper，the field observation data provided by Naqu station of Plateau Climate and Environment
in northern Qinghai-Xizang（Tibetan）Plateau，located in the seasonally frozen ground regions，CLM4. 5 is used
to analyze and evaluate the simulation ability of thermal conductivity parameterization schemes of Luo，Johan‐
sen，and Côté as well as virtual temperature parameterization scheme to calculate soil temperature and humidity，
providing basis for the future work of selecting the optimal parameters and parameterization schemes to more rea‐
sonably simulate the freeze-thaw process of frozen soil on Tibet Plateau. The results suggested that：（1）The soil
thermal conductivity of three parameterization schemes was significantly different，of which the Côté scheme
had the highest soil thermal conductivity，while the Luo scheme had the lowest.（2）All the three-soil heat con‐
ductivity parameterization schemes can reasonably simulate the daily variation trend of soil temperature and hu‐
midity. The Johansen scheme can better simulate the annual variation trend of soil temperature，the Côté scheme
has a smaller deviation from the observed value in soil temperature simulation，and Luo scheme has a better sim‐
ulation on soil moisture.（3）After adding the virtual temperature equation and introducing the phase transition ef‐
ficiency parameter，the negative deviation of the model for soil moisture simulation is reduced. In addition to
maintaining good simulation ability of soil temperature，the Y-L scheme can further improve the simulation abili‐
ty of soil moisture.
Key words：Seasonally frozen ground regions；CLM4. 5；soil temperature and humidity；parameterization
scheme