2006年“珍珠”台风影响期间福建省降水酸度分布特征分析

利用2006年"珍珠"台风影响福建省期间的酸雨监测资料和新一代天气雷达回波资料,对城市降水酸度分布特征及福州市短时段降水酸度进行分析,结果表明:来自海上的台风降水呈偏碱性;登陆后台风对福建省城市降水酸度的影响与其螺旋雨带上降水云团的移动路径及城市周边污染源分布有关;"珍珠"台风的短时段降水酸度并非保持恒定,对福州市降水酸度的影响会随着台风强度、风场结构的变化及螺旋雨带上降水云团途经下垫面城市大气污染排放状况而发生改变.

STUDY ON THE DISTRIBUTION CHARACTERISTICS OF PRECIPITATION ACIDITY IN FUJIAN PROVINCE DURING THE INFLUENCE OF TYPHOON CHANCHU IN 2006

Based on acid rain monitoring data and CINRAD radar echo data during the period of Typhoon Chanchu influencing Fujian Province in 2006, distribution characteristics of urban precipitation acidity and short-time interval acidity of Fuzhou are analyzed. The results show that the precipitation of typhoon onshore was of weak alkaline. The impact of landing typhoons on urban precipitation acidity of Fujian is related to the moving track of cloud clusters above the spiral rain band and the distribution of pollution sources surrounding cities. The short-time interval acidity of Typhoon Chanchu does not remain constant, and its influence on precipitation acidity of Fuzhou changes with typhoon intensity, wind field structure, and urban air pollution emission state as cloud clusters in spiral rain bands move over underlying surface.