摘要
收集了2005年12月至2006年2月的PM2.5浓度观测数据及同步气象数据,分析了冬季PM2.5质量浓度日变化趋势以及霾日期间PM2.5质量浓度日变化和小时变化趋势。结果发现,观测期间PM2.5日均值浓度为69μg/m3,霾日期间PM2.5日均值浓度为72μg/m3。冬季霾天气的发生频率为45%,霾天气过程最短持续2天,最长持续9天。较高的PM2.5浓度和较高的相对湿度及较小的风速是导致霾天气形成的主要原因。霾日期间PM2.5小时浓度变化趋势与人类活动周期和气象条件密切相关。
Data of PM2.5 （aerodynamic diameter less than 2.5 microns） concentrations and meteorological data were collected from December 2005 to February 2006 in air monitoring site in Guangzhou. By analyzing the diurnal variation trend of PM2. c5oncentrations in winter and the diurnal variations and hourly variations trends of PM2.5 concentrations during haze period in winter, the results were as follows： Average PM2.5 level were 69μg/m^3 in winter and 72μg/m^3 during haze period, respectively. The haze weather occurred frequency was 45 percent in winter. The shortest continuous process was two days and the longest continuous process was nine days. The higher PM2.5 level and the higher relative humidity and calm weather were mostly important for the haze weather. There were good relationships between the hourly variations trends of PM2.5 mass concentrations and the human activity and meteorological factors.
出处
《中国环境监测》
CAS
CSCD
北大核心
2007年第5期52-54,70,共4页
Environmental Monitoring in China
基金
国家环境知识创新华南基地基金(编号:2005010)
