利用SPAMS分析北京市硫酸盐、硝酸盐和铵盐季节变化特征及潜在源区分布  

Seasonal Variation Characteristics and Potential Source Contribution of Sulfate,Nitrate and Ammonium in Beijing by Using Single Particle Aerosol Mass Spectrometry

作　　者：刘浪[1] 张文杰[1] 杜世勇[2] 侯鲁健[2] 韩斌[1] 杨文[1] 陈敏东[3] 白志鹏[1] 

机构地区：[1]中国环境科学研究院,环境基准与风险评估国家重点实验室,北京100012 [2]济南市环境保护科学研究院,济南250014 [3]南京信息工程大学大气环境与装备技术协同创新中心,南京210044

出　　处：《环境科学》2016年第5期1609-1618,共10页Environmental Science

基　　金：国家自然科学基金项目(41205115)

摘　　要：采用单颗粒气溶胶质谱仪(SPAMS)于2013年12月至2014年11月在中国环境科学研究院内对大气颗粒物进行全年在线观测,采用特征离子法提取了观测结果中硫酸盐、硝酸盐和铵盐(SNA)的小时均值数据,分析了SNA混合特征和粒径分布随季节的变化.采用Hysplit模拟气团48 h的后向轨迹,并结合浓度权重轨迹方法(CWT),计算得到了影响北京市各季节SNA的潜在源区分布.结果表明,春、夏季颗粒物中硫酸盐、硝酸盐和铵盐混合比例较秋、冬季更加稳定.硫酸盐和硝酸盐的粒径分布特征十分相似,表明硫酸盐和硝酸盐成分在颗粒物中大多同时存在.颗粒物中SNA粒径分布的季节变化特征为:秋季SNA最大粒径段>夏季>春季>冬季.SNA潜在源区分布有较为相似的空间分布特征,对北京市SNA高贡献的潜在源区主要分布在北京本地以及南部区域,以天津、廊坊、衡水、保定、石家庄等地为主.Single particle aerosol mass spectrometry（ SPAMS） was deployed to continuously observe the aerosol particles of Beijing urban area from 2013-12 to 2014-11,and the hourly average data of sulfate,nitrate and ammonium（ SNA） were obtained using the characteristic ion tracer method. The mixing state and size distribution of SNA were analyzed. In addition,based on Hysplit 48 h back air mass trajectory results in combination with Concentration Weighted Trajectory method（ CWT）,we obtained the seasonal potential source contribution area of SNA. The results showed that the mixture of sulfate,nitrate and ammonium in spring and summer was more stable than that in autumn and winter. The size distribution of sulfate and nitrate was very similar. The size distribution characteristics of SNA followed the order of autumn summer spring winter. The potential source region of SNA had similar spatial distribution characteristics,and the potential source region of SNA was mainly located in Beijing and south areas,especially at Tianjin,Langfang,Hengshui,Baoding and Shijiazhuang.

关 键 词：单颗粒质谱 硫酸盐 硝酸盐 铵盐 潜在源区 

分 类 号：X513[环境科学与工程—环境工程]