青岛大气气溶胶中无机氮组分的粒径分布特征  

Size distributions of inorganic nitrogen in atmospheric aerosol of Qingdao

作　　者：于丽敏[1,2,3] 祁建华[1,2] 石金辉[1,2] 高会旺[1,2] 郭新宇[4] 姚翔[3] 

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100 [2]中国海洋大学环境科学与工程学院,山东青岛266100 [3]国家海洋环境监测中心,辽宁大连116023 [4]日本爱媛大学海洋环境研究中心2-5 Bunkyo-cho,Matsuyama,790-8577,Japan

出　　处：《海洋环境科学》2010年第4期457-463,481,共8页Marine Environmental Science

基　　金：国家重点基础研究发展规划(973)项目(2006CB403703);国家自然科学基金重大项目(40490262)

摘　　要：2005年7月～2006年8月对青岛大气气溶胶进行为期1a的连续观测,分析了气溶胶颗粒以及气溶胶中无机氮组分(NO2-N、NH4-N、NO3-N)的粒径分布。结果表明:颗粒物随粒径分布全年呈现明显的双峰分布,最高峰值出现于0.43～0.65μm的积聚模态,次峰值出现于3.3～4.7μm的粗模态,春季三月沙尘期间的粗模态峰值最为明显。NO3-N的分布略微复杂,夏、春季节与颗粒物类似呈现双峰分布,在粗粒态和细粒态上各出现峰值,而秋冬季节呈现单峰分布,最高峰值均出现在积聚模态;NO2-N性质不稳定,无明显的季节变化规律,但其全年平均却表现出一定的规律,呈现多模态分布;NH4-N的粒径分布的峰值均呈现单峰分布,峰值出现于0.43～0.65μm的积聚模态,无明显的季节变化。另外研究发现,春季沙尘天气和夏季海盐组分都对青岛大气气溶胶颗粒物及其中无机氮组分的粒径分布均有一定影响。The size-segregated aerosol samples were collected from Jun.2005 to Aug.2006 in Qingdao.The inorganic nitrogen components in aerosol（NO2-N,NH4-N,NO3-N） were analyzed using IC（Ion Chromatography）.The size distribution of particles shows the double peaks,with the higher peak in the accumulation mode（0.43～0.65 μm） and the lower one in coarse mode（3.3～4.7 μm）.And the peak presenting in the ＇coarse mode＇ was especially obvious in the sand dust period in Mar.The size distribution of NO3-N is similar to particulate matters with two peaks in summer and autumn,presenting single peak in the accumulation mode in winter and spring.NH4-N,a major inorganic nitrogen component in the particulate matters,showed single peak in the accumulation mode（0.43～0.65 μm）.The concentration of NO2-N in each stage was very low,and its spectrum distribution was also quite complex.The sand dust weather in spring and sea-salt in summer made the obvious influence on the size distributions of particles and inorganic nitrogen components in atmosphere.

关 键 词：气溶胶 粒径分布 无机氮 青岛 

分 类 号：P402[天文地球—大气物理学与大气环境]