在简化的简单生物圈模式中结合新的雪盖模型

本文提出了将一个新的雪盖模型（ＳＡＳＴ）与简化的简单生物圈模型（ＳＳＩ）相结合后的ＳＳＩＢ模型的改进形式，并利用俄罗斯及法国的观测数据对改进后的模型进行了检验。文中描述了改进后的ＳＳＩＢ模型中空气－植被－雪盖－土壤复杂系统之间有关能量和质量交换的过程，并给出为求解这一组非线性方程组所发展的有效计算方法。利用俄罗斯及法国的观测结果对这一新的改进模型功能进行了验证。结果表明改进后ＳＳＩＢ的数值模拟结果能较好地重现现场观测数据，说明这个新的改进形式可以推广用于气候研究。

Implementing a new snow scheme in Simplified Simple Biosphere Model

This paper describes a modified version of SSIB through implementing a new snow model (SAST) in Simplified Simple Biosphere Model SSIB for climate study and presents the evaluation results by testing the scheme based on the field data from Russia and France. The relevant equations in the scheme are given,which describe complicated interactive processes among air-vegetation-snow-soil continuum through mass and heat exchange. An efficient numerical scheme is developed to solve the nonlinear equations successfully.By using the field data from Russia and France, the function of the new scheme is evaluated. The numerical results from the scheme show good agreement with field data. It indicates that the scheme developed here is workable and can be extended for climate study.