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《Environmental Science & Technology》 2017-S2
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Changing Characteristics of Theat Mospheric Particulates of the Wild Duck Lake Wetland Station in Beijing

YANG Jingchao;SONG Nan;WANG Lu;Yanqing District Meteorological Service;Daxing District Meteorological Service;  
Statistic analysis was made of the characters of the mass concentrations and meteorological factors of PM_(2.5) and PM_(10) in Wild Duck Lake wetland ecological meteorological station,based on the observations during the period of 2013.The results showed that study phase annual mean concentrations of PM_(2.5) and PM_(10) were 45.7 μg/m3 and 80.2 μg/m~3. PM_(2.5) and PM_(10) exceeded the China National Ambient Air Quality Standard for ClassⅡ 17.8% and 11.4% respectively. The concentration of PM_(2.5) and PM_(10) were the highest in January, with the lowest value in July. Ratios of PM_(2.5) to PM_(10) in different seasons was37.8%~69.9%. In spring the mainly pollution was PM_(10) and the winter was mainly PM_(2.5). The diurnal variation peak of PM_(2.5) and PM_(10) were the earliest in the summer and the latest in winter. The diurnal variation of PM_(2.5) and PM_(10) showed two peaks in winter and spring, however, showed one peak in summer and fall. Diurnal variation of PM_(10) was a slightly different from in spring, the diurnal variation peak of PM_(10) intensity in the evening was a much higher than that in the morning.The pollutant of atmospheric particulates in Wild Duck Lake combined impact by local pollution and external pollution. When the station controlled by northeaster can cause more atmospheric particulates accumulation, however, the southwester has exactly the opposite. The typical contamination process suggested that constantly controlled by northeaster, wind speed of 2.00 m/s and relative humidity of 80.0% can lead to atmospheric particulates pollution, however, the southwester, warmer temperatures and lower relative humidity can play a role in alleviating pollution.
【Fund】: 北京市延庆区2016年优秀人才培养资助项目:2019年世园会和2022年冬奥会环境气象保障人才培养项目
【CateGory Index】: X513
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