Origin of the water-soluble organic nitrogen in the maritime aerosol
Origin of the water-soluble organic nitrogen in the maritime aerosol
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DOI：
10.1016/j.atmosenv.2017.07.050
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发表时间：
2017-10
影响因子：
5
通讯作者：
K. Matsumoto;Yuya Yamamoto;Kotaro Nishizawa;N. Kaneyasu;T. Irino;H. Yoshikawa‐Inoue
中科院分区：
文献类型：
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作者：
K. Matsumoto;Yuya Yamamoto;Kotaro Nishizawa;N. Kaneyasu;T. Irino;H. Yoshikawa‐Inoue
为了阐明海洋大气中颗粒WSON的产生过程，在日本北端附近的Rishiri岛的沿海站点进行了WSON和气溶胶中相关物种的测量。气溶胶中WSON的平均浓度为0.077 μg m−3，与以前在偏远或农村清洁站点的测量结果一致。WSON约占气溶胶WSTN的13%，其中约90%的WSON在精细模范围（d < 2 μm）检测到。两个模态范围的WSON均与气团起源无关。细模态WSON与nss- so42相关，无论nss- so42是人为源还是海洋生物源，表明细模态WSON可能是由酸性颗粒阶段的二次过程产生的。另一方面，EC和nss-K+在精细模式范围内与WSON无关，这表明化石燃料和/或生物质燃烧的一次排放不是WSON的重要来源。粗模WSON不与任何物种相关。尘埃颗粒和植物碎屑对粗颗粒的影响可以忽略不计，会导致WSON在粗模范围内的浓度很低。
In order to clarify the production process for the particulate WSON in the maritime atmosphere, measurements of the WSON and the associated species in the aerosols were conducted at the coastal site on Rishiri Island near the northern tip of Japan. The mean concentration of the WSON in the aerosols was 0.077 μg m−3, which was within the previous measurements from the remote or rural clean sites. The WSON accounted for about 13% of the WSTN in the aerosols, and about 90% of the WSON was detected in the fine-mode range (d < 2 μm). The WSON in both mode ranges was not associated with the air mass origin. The fine-mode WSON was correlated with nss-SO42-whether nss-SO42-was derived from anthropogenic or marine biogenic sources, suggesting that the WSON in the fine-mode range would be produced by the secondary processes in the acid particulate phase. EC and nss-K+, on the other hand, were not associated with the WSON in the fine-mode range, suggesting that the primary emissions from fossil fuel and/or biomass combustion are not important sources for the WSON. The coarse-mode WSON was not associated with any species. Negligible influence of dust particles and plant debris on coarse particle would cause very low concentrations of the WSON in the coarse-mode range.