利用公共陆面模式CoLM (community land model),检验其在西北干旱区敦煌戈壁陆面过程特征的模拟能力.通过2008年敦煌夏季典型晴天观测资料驱动模式,对模式在敦煌戈壁地区的适应性进行研究,通过和该站点同期实测资料对比发现:公共陆面模式(CoLM)基本能较好地模拟极端干旱区,如对敦煌戈壁下垫面的地表能量通量,及对于物理量的日变化趋势模拟得均比较准确,与观测值的相关系数较高.不足之处是对于感热的模拟,白天的模拟峰值偏大,而在夜间负感热的峰值也存在偏大现象.利用辐射资料计算出该下垫面反照率为0.25,修改模式中反照率的设定后,从模拟结果来看CoLM的模拟能力有一定改进.
SIMULATION ANALYSIS OF LAND SURFACE PROCESS OVER GOBI AT ARID REGION OF NORTHWEST CHINA DURING SUMMER
Using meteorological data collected in Dunhuang Gobi observation site as the force data during summer in 2008,the applicability of Community Land Model on Gobi regions was analyzed by comparison of simulated and observed values.Results showed that CoLM model is capable of providing good simulations of the evolution of land surface energy in extreme arid region,and the simulations shown to be basically in agreement with observations with the high correlation coefficients and the daily variation fits well.But this model also has some defects,bias between sensible heat simulations and observations is large during the max value in daytime,and the simulation is higher during the nighttime.Average albedo calculated by flux data and the value is 0.25.The model' s albedo was modified,and the results are improved.
CoLM modelDunhuang Gobisimulation studyland surface energy
NETL
NSTL
万方数据
维普
