【摘要】 为评价环境湿度变化对TEOM?1400a系列环境颗粒物监测仪进行PM10观测的影响,在2004年1月到2005年1月的观测过程中,获得了30min平均的大气PM10质量浓度,并观测了地面气象条件及降水过程中仪器的响应。结果表明,湿度变化较大时仪器记录的PM10浓度明显受到滤膜上吸附的水汽含量变化的影响。仪器提供的PM10质量浓度反映出明显的日变化规律,分别在8:00~9:30和18:00~23:00出现峰值而在12:00~15:30出现谷值;此变化规律反映了大气污染物的日变化特征,但也受到空气湿度变化的影响。应用该仪器时对空气湿度的影响应当予以考虑。更多还原

【Abstract】 The 30-minute average atmospheric PM10 concentrationwas observed during Jul, 2004 to Jan, 2005 to evaluate the air humidityinfluence on application of TEOM series 1400a ambient particulatemonitor in PM10 measurement. The meteorological conditions nearthe surface, and the response of the monitor during precipitationcourse were also observed. The results indicated that PM10 mass con-centration reported by the monitor was influenced significantly by thechange of absorbed moisture content on the filter when ambient hu-midity varied greatly. The PM10 concentration reported by the moni-tor shows obviously the daily variability, that is, peak values emergeduring 8:00-9:30 and 18:00-23:00, while minimum value emerges dur-ing 12:00-15:30. This characteristic is corresponding with daily vari-ability of atmospheric pollutant. The changing pattern of PM10 massconcntration is also influenced by the air humidity which should beconsidered when using this monitor.更多还原