作　　者： ; ; ; ; ; ;

机构地区： 暨南大学理工学院环境工程系

出　　处： 《中国环境监测》 2009年第2期31-34,共4页

摘　　要： 于2008年1月利用颗粒物计数器（CPC）、颗粒物在线观测仪（TEOM1400a）、自动气象站以及现时天气现象传感器（PWD22）获得了大气颗粒物中每分钟颗粒物数浓度、每30分钟PM2，浓度、风速、相对湿度、降雨量等气象因子以及大气能见度。结果发现，1月份能见度低于10km的天数达到25天，其中灰霾天气有17天。灰霾天气下，颗粒物数浓度为22032±4731个，立方厘米，PM2.5浓度为123．1±64．5μg／m^3。非灰霾和灰霾天气下颗粒物数浓度日变化趋势总体比较接近，但在13：00-16：00时段，非灰霾天气条件下颗粒物数浓度变化比较明显，而灰霾天气条件下颗粒物数浓度变化比较平缓。观测期内颗粒物数浓度与大气能见度、相对湿度、风速呈负相关，与PM2.5质量浓度、温度呈正相关。灰霾天气下颗粒物数浓度与PM2.5浓度、相对湿度的相关性系数绝对值明显高于非灰霾天气下颗粒物数浓度与这两者的相关性系数绝对值。 Particle number density and PM2.5 mass concentration and meteorological data and visibility have been measured by Condensation Particle Counters and TEOM1400a （Tapered Element Oscillating Microbalance ） and Present Weather Detectors at Guangzhou station in January 2008. The results showed that：The number of the days which the visibilities were less than 10km was 25 days. The number of the hazy days was 17 days. The particle number density and PM2.5 mass concentration are 22032 ± 4731 /cm^3 and 123.1 ± 64.5μg/m^3 in hazy days, respectively. The daily variation of particle number density was similar between the haze days and normal days, especially the variation of particle number density in normal days was more obvious than in hazy days during 13：00 - 16： 00. The particle number density had a negative relationship with visibility and relative humidity and wind speed and had a positive relationship with PM2.5 mass concentration and temperature during observation period. The absolute values of correlation coefficients between particle number density and PM2.5 mass concentration and relative humidity in hazy days were much higher than in normal days.

关 键 词： 颗粒物数浓度 大气能见度 相对湿度

领　　域： [环境科学与工程]