Aerosol particles collected on aircraft flights over the northwestern Pacific region during the ACE-Asia campaign: Composition and major sources of the organic compounds
Aerosol particles collected on aircraft flights over the northwestern Pacific region during the ACE-Asia campaign: Composition and major sources of the organic compounds
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DOI：
10.1029/2004jd004565
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发表时间：
2004-10
影响因子：
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通讯作者：
B. Simoneit;Minoru Kobayashi;M. Mochida;K. Kawamura;B. Huebert
中科院分区：
文献类型：
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作者：
B. Simoneit;Minoru Kobayashi;M. Mochida;K. Kawamura;B. Huebert
有趣的是，水溶性化合物（72-133 ng m3）占总鉴定化合物质量（TCM）的16-50%（平均34%）。有机化合物被进一步分为几类，以表明它们的来源。化石燃料燃烧被认为是最重要的TCM来源（占TCM的33-80%，平均50%），其次是土壤再悬浮（5-25%，平均19%）和二次氧化产物（4-15%，平均9%）。相比之下，陆生植物蜡和海洋脂类（脂肪酸和烷醇）等天然来源的贡献相对较小（平均分别为3.4%和9.4%）。在春季，生物质燃烧对亚洲气溶胶的TCM贡献很小（基于左旋葡聚糖的平均贡献为1.4%）。然而，左旋葡聚糖可能在远程运输过程中部分水解和/或氧化，因此该值代表了下限。这些样品的有机化合物组成与报道的大西洋气溶胶颗粒的有机化合物和早期太平洋中部的数据有很大的不同，因为它们大量存在由糖类、无水糖类和次生二羧酸组成的水溶性化合物。这项研究表明，有机示踪剂方法可以在飞机上采集的小样本上进行，并且有助于更好地了解亚洲/太平洋地区有机气溶胶的来源。索引术语：0305大气成分和结构：气溶胶和颗粒（0345,4801）；0315大气组成与结构：生物圈/大气相互作用；大气成分和结构：对流层成分和化学；1055地球化学：有机地球化学；9320地理区域相关信息：亚洲；
Interestingly, the water-soluble compounds (72–133 ng m 3 ) were found to account for 16–50% (average 34%) of the total identified compound mass (TCM). Organic compounds were further categorized into several groups to suggest their sources. Fossil fuel combustion was recognized as the most significant source for the TCM (contributing 33–80% of TCM, average 50%), followed by soil resuspension (5–25%, average 19%) and secondary oxidation products (4–15%, average 9%). In contrast, the contribution of natural sources such as terrestrial plant wax and marine lipids (fatty acids and alkanols) was relatively small (3.4% and 9.4% on average, respectively). Biomass burning was suggested to contribute only a minor portion to the TCM of the Asian aerosols during the spring season (1.4% on average based on levoglucosan). However, levoglucosan may have been hydrolyzed and/or oxidized in part during long-range transport, and therefore this value represents a lower limit. The organic compound compositions of these samples are very different from those reported for aerosol particles of the Atlantic Ocean and from the earlier data for the mid-Pacific in terms of the abundant presence of water-soluble compounds consisting of saccharides, anhydrosaccharides, and the secondary dicarboxylic acids. This study demonstrated that the organic tracer approach can be carried out on small samples acquired on aircraft and is useful to better understand the sources of organic aerosols over the Asia/Pacific region. INDEX TERMS: 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801); 0315 Atmospheric Composition and Structure: Biosphere/ atmosphere interactions; 0365 Atmospheric Composition and Structure: Troposphere—composition and chemistry; 1055 Geochemistry: Organic geochemistry; 9320 Information Related to Geographic Region: Asia;