摘要
利用中尺度数值模式MM5和四维同化技术相结合对珠三角地区的海陆风过程进行了模拟。结果表明,同化GTS和观测资料使得模拟的风场和实际情况更为接近,反映出了该区域海陆风的基本特点和日变换特征。针对该地区城市化日益加剧的现象,设计了敏感性试验,结果表明,城市化对珠三角地区的海陆风强度和方向有很大的影响,特别是中午增强的海风使得珠三角东岸的低层辐合加强,污染加剧。
In this study,Atmospheric Research Model（MM5） and Four-dimensional data assimilation（FDDA） was used to simulate the land and sea breeze（LSB） circulation over the Pearl River Delta Region.Assimilation GTS and station observation data into the model could improve the simulation of the wind fields and the simulated surface winds were shown to be capable of reproducing the basic features and diurnal variation of the LSB.Sensitivity experiment in view of the aggravated urbanization was preformed with this model.Results of these experiments show that urbanization in the PRD region had significant effects on the patterns of the LSB and circulation in the region.In particular,the enhancements of the sea breeze at noon increased the low level convergence over the eastern coast of the PRD region and worsened the air pollution problems.
出处
《安徽农业科学》
CAS
北大核心
2009年第1期312-315,共4页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目(40875025
40775033
40575022
40405009)
关键词
资料同化
海陆风
局地环流
城市化
珠三角地区
Data assimilation
Land and sea breeze
Local circulation
Urbanization
