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陆面过程模式对土壤含水量初值的敏感性研究
引用本文:林朝晖,杨小松,郭裕福.陆面过程模式对土壤含水量初值的敏感性研究[J].气候与环境研究,2001,6(2):240-248.
作者姓名:林朝晖  杨小松  郭裕福
作者单位:中国科学院大气物理研究所
基金项目:国家自然科学基金资助项目49794030和49905004以及优秀国家重点实验室研究项目40023001
摘    要:利用IAP94陆面过程模式,采用淮河流域能量与水份循环试验(HUBEX)期间两种下垫面(森林和旱田)、不同季节(5月、8月和11月)的观测资料,研究了模式对土壤含水量初值的敏感性.结果表明:对于森林和旱田下垫面,当土壤含水量减少时,地表净辐射均略有减少,同时潜热通量减少而感热通量增加.另外,模式对土壤含水量初值的敏感性有较明显的季节差异,相对而言在晚春和夏季较强,而在秋季明显减弱.这说明春夏季节的土壤含水量初值在淮河流域区域气候的模拟和预测中尤其值得关注.

关 键 词:土壤含水量  陆面过程
修稿时间:2001年3月1日

Sensitivity of Land Surface Model to the Initial Condition of Soil Moisture
Lin Zhaohui,Yang Xiaosong and Guo Yufu.Sensitivity of Land Surface Model to the Initial Condition of Soil Moisture[J].Climatic and Environmental Research,2001,6(2):240-248.
Authors:Lin Zhaohui  Yang Xiaosong and Guo Yufu
Abstract:With the HUBEX field experimental data over the forest and farmland in different seasons (May, August and November, respectively), the sensitivity experiments of IAP94 land model to the initial values of soil moisture have been conducted. Comparison results show that IAP94 land surface model is quite sensitive to the initial conditions of soil moisture over the Huaihe River basin, when the initial soil moisture decreases, the net radiation at surface decreases, along with the decreased latent heat flux and increased sensible heat flux. The sensitivity is quite strong in late Spring (May) and Summer (August), and relatively weaker in Autumn (November), and these suggest that the soil moisture in spring and summer are very important for the regional climate sumulation and prediction, especially over Huaihe River basin.
Keywords:soil moisture  land surface process
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