Observation and Simulation of Energy and Water Transport by Soil Gravel on the Qinghai-Xizang Plateau

Abstract

In order to test the long-term simulation effect of regional climate model Regcm4.7 coupled with CLM4.5 on soil variables in the Tibetan Plateau after gravel parameters are added， therefore， the observational data of Ngari， Nagqu and Maduo stations on the Qinghai-Xizang Plateau and the CMA's global atmospheric Re-Analysis （CRA/Land） -daily product （Land product） were selected to test the simulation effect of the model.The results show that the simulation effect of soil temperature is better， and the correlation coefficient of deep soil is higher than that of shallow soil， the deviation between gravel data and reanalysis data is smaller， and the average variation trend of multi-year data is more uniform.Compared with soil temperature， the simulation effect of soil moisture is slightly worse， especially in the central part of the Qinghai-Xizang Plateau.However， in the eastern and southwestern parts of the Qinghai-Xizang Plateau， the simulation effect is greatly improved， and the deviation from the reanalysis data is significantly reduced.Through continuous years of simulation， it is found that the simulation effect of the model does not improve year by year with the optimization of parameterization scheme， but fluctuates within a certain range， and the simulation effect of each year is improved in correlation coefficient and root mean square error compared with the original model.

Keywords

• qinghai-xizang plateau
• regcm4.7
• soil moisture
• soil temperature