黄伟,郭振海,宇如聪. 2004. CLM在淮河流域数值模拟试验[J]. 气象学报, 62(6):764-775, doi:10.11676/qxxb2004.072
CLM在淮河流域数值模拟试验
NUMERICAL SIMULATION OF CLM OVER HUAIHE BASIN
投稿时间:2003-06-09  修订日期:2003-08-23
DOI:10.11676/qxxb2004.072
中文关键词:  陆面过程模式  HUBEX  CLM  通量
英文关键词:Land process model  HUBEX  CLM  Flux
基金项目:中国科学院百人计划"气候与值被相互作用"项目与国家自然科学基金重点基金(40233031)
作者单位
黄伟 中国科学院大气物理研究所, LASG, 北京 100029 
郭振海 中国科学院大气物理研究所, LASG, 北京 100029 
宇如聪 中国科学院大气物理研究所, LASG, 北京 100029 
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中文摘要:
      文中利用1998年HUCEX资料对Common Land Model(CLM)的模拟能力进行了验证。结果表明,CLM不但能够较好地模拟陆气间各种能量通量,而且还能模拟出土壤中温度的时空分布特征。春季,CLM对潜热模拟偏高,从而引起土壤温度模拟偏低;而在夏季,潜热模拟偏低,在旱地下垫面由于净辐射模拟偏低使土壤温度的模拟仍然偏低,水田下垫面的土壤温度模拟趋向合理。夏季的水田无论在对大气的能量输送还是土壤的温度分布上,都有其特殊性,需在陆面模式中予以特殊的考虑。
英文摘要:
      The Common Land Model(CLM) is used to simulate the characteristics of exchange of sensible and latent flux and thermody namic process in soil,and validate the simulation of CLM on two underlying surfaces,dry farm and paddy field,in two vegetative seasons,May and August,over Huaihe River basin using the data of HUBEX/GAME in 1998.The com parison result of simulated and observed data shows that CLM is not only able to simulate basic charact eristics of energy and mass transfer between land and air,but also able to simulate the heat transfer in soil.The study concludes that:(1) The simulation atdry form shows that the latentheat flux is underest imated and the sensible heat flux is accordingly overest imated when the turbulence process is strong at noon in both May and August.In May,the lat entheat is overestimated and simulated errors vary distinctly with the change of stability of the surface layer at mosphere.In August,the latentheat is always underest imated in varied atmosphere stability.The mean simulated error of latentheat and sensible heat is about 10 W/m2.In both May and Aug ust,the simulated soil temperatures are lower than observation and there is one-hour late in phase difference.(2) The simulation at paddy field shows that the simulated netsolar fluxes in CLM are lower than observation by 10 W/m2 in both May and August.The latentheat flux is usually overest imated in May while it is underest imated in August except that it is overest imated when turbulence transfer is strong.The simulated soil temperatures in August are plausible and in accordance with the observed data from both the daily variation in phase and range of temperature variation.Compared with May,the simulation of thermody namic process in soil is greatly improved.(3) The comparison results of four simulating experiments show that the simulation of CLM is,to great extend,influenced by the choice of underlying surface types and the characteristics of water and heat transfer in soil.So it is necessary to identify precisely the parameters of underlying surfaces when CLM is applied.
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