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2010年1月北京城区大气消光系数重建及其贡献因子
Authors
张仁健
曹军骥
+4 more
朱李华
赵岳
陈忠明
陶俊
Publication date
30 January 2012
Publisher
Abstract
于2010年1月1~31日在北京城区每天采集PM_(2.5)样品.利用热光碳分析仪、离子色谱和X荧光光谱仪分别分析样品中有机碳/元素碳、水溶性离子和土壤元素,同步收集了大气散射系数(b_(sp))、吸收系数(b_(ap))和气象数据.利用IMPROVE方程重建大气消光系数,并与实测大气消光系数进行对比.结果发现,PM_(2.5)日均值质量浓度为(144.3±89.1)μg.m~(-3),实测值b_(ap)、b_(sp)和消光系数(b_(ext))分别为(67.4±54.3)、(328.5±353.8)和(395.9±405.2)Mm~(-1).IMPROVE方程适用于观测期间北京大气消光系数的解析.观测期间计算值b’_(ext)均值为(611±503)Mm~(-1),(NH_4)_2SO_4、NH_4NO_3、OM、EC和FS对b’_(ext)的贡献分别为24.6%、11.6%、45.5%、11.9%和6.4%
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Last time updated on 03/02/2019