摘要
应用中尺度MM5v3模式,对2002年7月14日的高温过程进行模拟分析,探讨了北京周边地形及城市下垫面对气温变化的影响。结果表明,地形对气温的影响主要是通过焚风效应来实现的,它加剧了背风坡一侧高温的强度。敏感性试验还表明,城市下垫面通过所获得感热和释放潜热的不同进而影响近地面层温度,采用真实地表能较好改进模式对逐时气温演变、日最高气温及其出现时间的模拟精度。
The MM5v3 model is used to simulate the influence of terrain and urban landuse on summer heat wave in Beijing on 14 July 2002. The results show that the terrain affects obviously the intensity of high temperature on the leeward side of the mountain by means of the fochn effect. The urban landusc influenced surface layer temperature by mcans of obtaining sensible heat and emitting latent heat. It is proved that the real urban landusc can greatly improved the simulation to the hourly temperature variation and the value and appearance time of daily maximum temperature.
出处
《热带气象学报》
CSCD
北大核心
2006年第6期672-676,共5页
Journal of Tropical Meteorology
基金
北京市科委项目(H020620190091)
科技部项目(2002BA904B05
2002DIB10051)共同资助
关键词
高温
地形
下垫面
数值模拟
high temperature
terrain
landuse： numerical simulation
