青藏高原中部土壤热传导率参数化方案的确立及在数值模式中的应用

Soil thermal conductivity parameterization establishment and application in numerical model of central Tibetan Plateau

本文针对模式发展的需要,在Farouki土壤热传导率参数化方案的基础上,综合Johansen和C(?)té的参数化方案,发展了一个用于青藏高原中部的土壤热传导率参数化方案,用"全球协调加强观测计划之亚澳季风青藏高原试验计划(CAMP/Tibet)"中那曲布交(BJ)站实际资料对该方案进行了检验,并将它用于公共陆面模式(CoLM)中,对青藏高原那曲地区进行了单点数值模拟试验.结果表明:在未冻结及冻结土壤中,新方案比Farouki方案计算的土壤热传导率小,更接近实测值.加入新方案的CoLM模式对土壤温度模拟的准确性比原模式有一定的提高.

Based on soil thermal conductivity parameterization of Farouki, Johansen and Coté, a new soil thermal conductivity parameterization scheme of central Tibetan Plateau has been established. The new soil thermal conductivity parameterization has been verified by the observed data of Bujiao （BJ） site in the Coordinated Enhanced Observing Period Asia Australia Monsoon Project on the Tibetan Plateau （CAMP/Tibet）. And an off-line numerical simulation experiment by Common Land Model （CoLM） with new soil thermal conductivity parameterization scheme on the Tibetan Plateau is presented. The results show that in both unfrozen and frozen soil, the calculated soil thermal conductivity by the new scheme is better than Farouki scheme. The soil temperature simulation of CoLM with new soil thermal conductivity is better than that of original CoLM.