Page 231 - 《高原气象》2022年第5期

高 原 气 象 41 卷
1324

Simulation of Land Surface Temperature in Northern China by

Three Soil Thermal Conductivity Models

2
REN Yulong ，LI Zhengchao ，JIANG Junxia ，GAO Xiaoqing ，ZHOU Ganling ，LU Yaling 1
1
2
2，3
1
（1. Institute of Arid Meteorology，Chinese Meteoroligical Academy，Key Laboratory of Arid Climatic Change and Reducing Disaster
of Gansu Province，Key Laboratory of Arid Climate Change and Disaster Reduction of CMA，Lanzhou 730000，Gansu，China；
2. Northwest Institute of Eco-Environment and Resource，Chinese Academy of Sciences，Key Laboratory of Land Surface Process
and Climate Change in Cold and Arid Regions，Chinese Academy of Sciences，Lanzhou 730000，Gansu，China；
3. University of Chinese Academy of Sciences，Beijing 100049，China）
Abstract：In order to improve the simulation performance of NCAR CLM4. 5（The Community Land Model
Version 4. 5）for land surface temperature（LST）in northern China，the ability of three commonly used soil ther‐
mal conductivity（STC）models were tested in this paper. The results show that these schemes can simulate the
temporal and spatial characteristics of land surface temperature in northern China well. The LST in northern Chi‐
na has risen in recent 30 years，especially since 2003. The trend can be simulated by all these three schemes and
shows a significant correlation with the observed LST，but the simulated warming amplitude is small than that of
observation. The overall evaluation based on the taylor diagram and precipitation simulation shows that LR
scheme has the best simulation effect. Therefore，a new scheme of STC that more suitable for climate simulation
in northern China is added to CLM4. 5，which promotes the development of the land surface model.
Key words：CLM4. 5；land surface temperature；soil thermal conductivity；numerical simulation