| 摘要: |
| 2015年9月，分两个航次同时对西北太平洋及中国东部近海上空海洋气溶胶进行采集.对样品中的Na+、K+、Ca2+、Mg2+、Cl-、NH+4、NO-3、SO2-4、甲基磺酸（MSA）等9种组分进行了分析，结合数理统计方法探究两个海域上空海洋气溶胶的来源.结果表明西北太平洋及中国东部近海海域气溶胶来源具有显著差异，西北太平洋海域气溶胶以海盐来源为主，中国东部近海海域则受陆源气溶胶影响较大，K+、Ca2+及二次气溶胶含量明显高于西北太平洋；此外，中国东部近海海域气溶胶中MSA含量平均值高于西北太平洋.本研究还估算了NH+4、NO-3、SO2-4在两个海域的干沉降通量，中国东部近海营养盐气溶胶干沉降通量远大于西北太平洋，营养盐的输入有利于海洋初级生产力的提高，也会促进生物来源气溶胶的产生. |
| 关键词: 海洋化学 海洋气溶胶 来源 干沉降通量 |
| DOI：10.3969/J.ISSN.2095-4972.2016.03.004 |
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| 基金项目:南北极环境综合考察与评估专项资助项目（CHINARE2012 2016：01 04 02）；国家海洋局极地考察办公室对外合作支持资助项目（IC201308，IC201513）；国家海洋局西太平洋海洋环境监测预警体系建设专项资助项目（SOA201303） |
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| Characters of the aerosol over the northwest Pacific and eastern China coastal area in antumn |
| JI Jiabin,CHEN Liqi,WANG Jianjun,LIN Hongmei,LIN Qi |
| (Third Institute of Oceanography， SOA， Xiamen 361005， China) |
| Abstract: |
| Aerosol samples were collected in the northwest Pacific and the eastern China coastal area in September 2015. We analyzed the concentrations of Na+， K+， Ca2+， Mg2+， Cl-， NH+4， NO-3， SO2-4 and dimethylsulfide （MSA） and explored 9 sources of watersoluble ions statistically. Significant difference in aerosol composition indicated that various airflow influence over 2 sea areas. Sea salt was the important original aerosol over the northwest Pacific and the terrestrial air with heavy crustal particles and anthropogenic aerosol affected the eastern China coastal area. The concentration of K+， Ca2+， MSA and secondary ions were higher in the eastern China coastal area than in the northwest Pacific. The monthly atmospheric aerosol dry deposition fluxes of NH+4， NO-3， SO2-4 to the eastern China coastal area were obviously higher than the northwest Pacific in autumn by estimation. The input of nutrients has contributions increasing marine primary production and promoting the release of biological aerosol． |
| Key words: marine chemistry marine aerosol source dry deposition flux |
