Abstract:Based on the hourly wind, relativity humidity and visibility data from Guangzhou meteorological station during 2006 to 2010 and hourly wind data from other 33 meteorological stations over the Pearl River Delta during 2006 to 2009, variation characteristics and influence factors in haze and cleaning weather were analyzed over Guangzhou area by using statistically analysis and Vector Sum Technique (VST) of wind. It was found that, the haze weather occurred frequently in dry season over Guangzhou area. When the haze weather happened, the prevailing wind was SE to SSE, the wind speed was lower than 1.5m/s, and calm winds appeared frequently. In haze weather, the VST of wind speed was comparatively small, the air pollutants accumulated because of the worse diffusion conditions. The cleaning weather most occurred in wet season, the wind speed was relatively large and the prevailing wind was SE to SSE. Sometimes the cleaning weather happened in dry season when the N to NE wind was stronger. In cleaning weather, the VST of wind speed was comparatively large; there existed strong advection transportation of air pollutants.
吴蒙, 范绍佳, 吴兑, 廖碧婷, 李海燕. 广州地区灰霾与清洁天气变化特征及影响因素分析[J]. 中国环境科学, 2012, 32(8): 1409-1415.
WU Meng, FAN Shao-Jia, WU Dui, LIAO Bi-Ting, LI Hai-Yan. Characteristics and influence factors study of haze and cleaning weather over Guangzhou Area. CHINA ENVIRONMENTAL SCIENCECE, 2012, 32(8): 1409-1415.