摘要
应用2004年白洋淀野外观测实验资料,对白洋淀地区水、陆不均匀分布条件下的大气边界层开展了数值模拟试验,结果表明:由于下垫面的热力差异,在360多km2的白洋淀地区,地表特征分布的不均匀可以引发弱的局地环流,影响大气边界层内温度和湿度的空间分布;在500 m高度以下,下垫面不均匀分布对湍流动能有明显影响。最后将模拟结果与观测资料进行了对比检验。
The atmospheric boundary layer structure over a water-land heterogeneous surface（ Baiyang- dian region） is simulated by the RAMS（ the Regional Atmospheric Modeling System） model. The simulated results of potential temperature and specific humidity are compared with the data measured during the field experiment in the Baiyangdian region in November 2004. Simulated results show that the weak local circulation induced by the thermal difference of underlying surfaces occurred in the Baiyangdian region, i. e. a water-land heterogeneous region （about 360 km^2）, and it impacted the spatial distributions of specific humidity and temperature within the boundary layer, and of turbulent kinetic energy below 500 m. Finally, the simulated results are also compared with the observed data.
出处
《南京气象学院学报》
CSCD
北大核心
2007年第2期162-169,共8页
Journal of Nanjing Institute of Meteorology
基金
国家自然科学基金资助项目(4060500640405004)
国家自然科学基金重点资助项目(40233030)
关键词
不均匀下垫面
大气边界层
湍流动能
数值模拟
heterogeneous surface
atmospheric boundary layer（ABL）
turbulent kinetic energy
numer- ical simulation
