珠江三角洲地区边界层气象特征研究

Analysis on the Boundary Layer Meteorological Features of the Pearl River Delta

根据珠江三角洲地区9个气象台站1995-2000年地面气象资料和部分地区的探空资料,分析研究区域气候与天气背景,风、温、混合层厚度、大气稳定度等大气边界层特征。结果表明:珠江三角洲地区受季风影响显著,还受海陆风、城市热岛环流、越南岭下沉气流等的复合影响;逆温频率很高,混合层高度较低,大气层结比较稳定;复杂的下垫面对珠江三角洲地区大气边界层有重要影响。

Base on ground weather data of 9 meteorological stations from 1995 to 2000 and some regional boundary layer sounding data in the Pearl River Delta, the regional climate and weather background, temporal and spatial variation features of wind, temperature, mixing height and stability are studied. The results show that the wind field of the Pearl River Delta is not only affected significantly by monsoon, but also affected by sea_land breeze, urban heat island circulation and the downdraft of cold wind across the Nanling Mountain. The temperature inversion frequency is very high, the mixing height is low and the stratification tends to stable. The complex underlying surface strongly affects on the boundary layer meteorological features of the Pearl River Delta.