厦门岛南部沿岸大气气溶胶成分谱分布特征  

A study of aerosol chemical compositions and size distribution property on the coastal area of southern Xiamen Island

作　　者：颜金培[1,2] 陈立奇[1] 林奇[1] 张远辉[1] 李忠[1] 

机构地区：[1]国家海洋局海洋-大气化学与全球变化重点实验室、国家海洋局第三海洋研究所,福建厦门361005 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《应用海洋学学报》2013年第4期455-460,共6页Journal of Applied Oceanography

基　　金：国家海洋局第三海洋研究所基本科研业务费专项资助项目(海三科2011023);国家海洋局青年基金资助项目(2013534);国家自然科学基金资助项目(21106018);国家海洋局公益专项资助项目(2004DIB5J178)

摘　　要：采用单颗粒气溶胶质谱仪（SPAMS）对厦门岛南部沿岸大气气溶胶颗粒进行了实时在线分析,获得了大气气溶胶颗粒的粒径和化学组成的谱分布特性,并对大气气溶胶的浓度、组成及其来源进行了分析.结果表明：厦门近海大气气溶胶在测量范围内呈单峰分布,峰值粒径在0.6 μm左右,且主要为亚微米级颗粒物;含NOx-、HSO4-、Cl-、NH4＋和Na＋等的气溶胶颗粒具有明显的谱分布特性,含有NOX-、HSO4-和NH4的颗粒特征峰值在0.4～0.8μm之间.含NOX-、HSO4-、Cl-和Na＋的细颗粒具有明显的日变化特征,第一次较高颗粒数峰值发生在上午08：00～12：00之间;第二次较弱的峰值发生在23：00～03：00点之间.气溶胶颗粒中元素碳（EC）和有机碳（OC）占有较大的比重,二者占总颗粒物的28.96％,且主要分布在小粒径段颗粒;生物质燃烧颗粒和二次气溶胶颗粒分别占总颗粒数的21.77％和17.68％,说明该地区大气细颗粒中存在较为严重的二次气溶胶污染问题;海盐颗粒和粉尘颗粒主要集中分布在1.0～1.5μm的粒径段,其中海盐颗粒占总颗粒数的11.79％,说明海盐粒子对近海大气气溶胶的组成具有较大影响.Ambient aerosol on Xiamen coastal area was measured in real-time by signal particle aerosol mass pectrometer （SPAMS）.The spectra of chemical composition and size distribution characteristics of aerosol particles were obtained while the concentration and chemical compositions were investigated to identify their sources.The results show that the number size distribution of aerosol particles in Xiamen coastal area is distributed singly with peak diameter of 0.6 μm.Most of the aerosols are submicron particles.The number concentration of aerosol content NOx-,HSO4-,Cl-,NH4＋ and Na ＋ has significant spectral distribution characteristic.The peak size for aerosols containing NOx-,HSO4-and NH4＋ is between 0.4 to 0.8 μm.The diurnal variation of aerosol particles content NOx-,HSO4-,Cl-and Na＋ presents a bimodal distribution.A higher peak value appears between 8：00 to 12：00 in the morning and a much weaker one occurs between 23：00 to 03：00.The principal component is carbonaceous species.Elemental carbon（EC） and organic carbon（OC） accounts for 28.96％,and are mainly distributed in fine particles.Biomass burning and secondary aerosol accounts for 21.77％ and 17.68％ indicating the existence of serious secondary aerosol pollution in the ambient atmosphere.However,most of the sea salt and dust particles are in range of 1.0to 1.5 μm.And the sea salt particle accounts for 11.79％ showing significant impact of sea salt particles on the aerosols in coastal ambient atmosphere.

关 键 词：海洋化学 气溶胶 成分谱 分布 单颗粒气溶胶质谱仪 

分 类 号：P734[天文地球—海洋化学]