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?苏州城市灰霾及气溶胶对大气消光贡献的模拟研究*

DOI: 10.13232/j.cnki.jnju.2013.03.002, PP. 311-319

Keywords: 城市灰霾,数值模拟,消光系数,能见度,苏州?

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Abstract:

?利用南京大学空气质量模式(nju-caqps)对苏州地区2010年1、4、7、10月中旬共19d灰霾状况进行数值模拟,pm10,pm2.5、能见度等参数的模拟口平均与观测值模拟口平均比值分别为0.9,1.1、0、9.苏州北部郊区局地pm10,pm2.5严重超标,硫酸盐、硝酸盐等二次气溶胶浓度高值区位于主城区西部;模拟期间(总共456h)中有99h出现灰霾,发生率为21.7%,主城区西部最容易发生灰霾;城区硫酸盐对消光系数的贡献率最高,为39.1%硝酸盐、有机物、黑碳的贡献率分别为15.6%,18.3%和10.0%(明显高于郊区).

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