摘要
本文以内蒙草原大气边界层观测资料为基础，利用一个一维土壤一植被一大气模式对大气和地表进行耦合模拟。其中，地面过程采用ＮＰ８９模式进行模拟，大气湍流参数化采用二阶闭合。运用观测与前人的研究成果对模拟结果的合理性进行验证，对比表明模式较好地解决了地表与大气的耦合，成功地对地表平坦的草原下垫面大气边界层进行模拟。分析表明，在半干旱内蒙草原草的生长季后期雨季８月，潜热通量占主导地位，最大可超过感热２５０Ｗ／ｍ２；在内蒙高原云的作用比较明显，影响不可忽略，模式对云的作用比较敏感。
In this paper, a one--dimensional model of soil, vegetation and atmosphere is formed,which is based on the observations of PBL over the Inner Mongolia Grassland. It uses model NP89 to simulate the grassland surface processes and second--order closure technique to deal with the turbulence of the atmosphere. The land and atmospheric processes are coupled to simulate the temperature, wind and humidity in the atmospheric boundary layer and their vertical property and transport characteristics. The results of the simulation agree with observations. The research shows that sensible heat is smaller than latent heat in the semi--arid Inner Mongolia Grassland. Clouds should not be neglected in the plateau. The model is sensitive to clouds.
出处
《大气科学》
CSCD
北大核心
1996年第3期367-377,共11页
Chinese Journal of Atmospheric Sciences
基金
国家自然科学基金
关键词
草原
地气耦合
观测比较
模拟分析
coupling of grassland and atmospheric processes comparison with observations simulation and analysis
