【作者】 延昊； 矫梅燕；

【Author】 YAN Hao JIAO Mei-yan (National Meteorological Center,China Meteorological Administration,Beijing 100081)

【机构】 中国气象局国家气象中心；

【摘要】 北京南郊2005年可吸入颗粒物 PM10的逐日观测显示,PM10存在明显的季节变化,秋冬季的 PM10最小, 小于100μg/m~3,而春季(3、4、5月)的 PM10较高,经常超过200μg/m~3,年均 PM10为118μg/m~3。PM10与总悬浮颗粒物 TSP 的相关分析显示两者之间存在较好的相关性,相关系数 R~2为0．47。当沙尘天气发生时,PM10占 TSP 的比例增加很快,经常超过0．4。大气降尘总量的月变化显示,春季的大气降尘量最大,超过30g/m~2,与月均 PM10有相似的季节变化特征。这说明 PM10更适合北京沙尘颗粒物的浓度和降尘情况研究。更多还原

【Abstract】 PM10,TSP,and dustfall observation in southern Beijing were analyzed.Daily average PM10 for year 2005 indicates that PM10 has an obviously seasonal variation.PM10 is more smaller with a value of less than 100μg/m~3 in autumn and winter,and more bigger with a value of over 200μg/m~3 in spring.There exists a good correlation(R~2=0.47)between PM10 and TSP.Moreover,under dust weather,the ratio of PM10 to TSP increases very significantly with a value of over 0.4.Monthly dustfall shows a similar feature to PM10 which dustfaU is the largest in spring with a value of over 30g/m~2.PM10 is more suitable for the study of dust particle in Beijing.更多还原