科研之友
微信
新浪微博
Facebook
分享链接
摘要
In order to improve the simulation ability of the land surface model CLM4. 5（Community Land Model）to the alpine meadow on the Qinghai-Xizang Plateau，we used the observation data from June to September of three typical alpine meadow research stations，i. e. Maqu Station，Arou Station and Naqu Station，especially the measured soil properties，to run a single-point numerical simulation test of alpine meadow in summer half year，which provides a basis for improving the parameterization schemes of the model. The main conclusions are as follows：（1）CLM4. 5 model can well reproduce the seasonal changes of soil temperature and moisture，radiation flux and surface energy flux on the underlying surface of alpine meadow. The simulation results after modifying soil properties was obviously better than that before modification，but there was still some deviation from the observed.（2）After modified soil properties，the simulation of soil moisture of each layer at Maqu Station and Naqu Station was closer to the observed，and the shallow soil moisture at Arou Station was better than that at deep layer. After modified soil properties，although the model’s land surface conditions were closer to the actual，the improvement of the simulated soil temperature was not obvious.（3）Although the simulated values of reflected radiation before and after modification of soil properties were low at all three stations，the simulated values after modification of soil properties were better than those before modification. However，there was no significant improvement in the simulation of surface long wave radiation，and the correlation between the simulated values and the observed values at Arou Station was higher and the deviation was smaller.（4）The sensible heat flux simulation values of CLM 4. 5 model for each station was higher，and after modified soil properties，it was closer to the observed. After modified soil properties，the simulated and observed latent heat flux at Maqu and Naqu station were closer.
- 出版日期2020
