We present shipborne measurements of size-resolved concentrations of aerosol components across ocean waters next to the Antarctic Peninsula, South Orkney Islands, and South Georgia Island, evidencing aerosol features associated with distinct eco-regions. Nonmethanesulfonic acid Water-Soluble Organic Matter (WSOM) represented 6–8% and 11–22% of the aerosol PM₁ mass originated in open ocean (OO) and sea ice (SI) regions, respectively. Other major components included sea salt (86–88% OO, 24–27% SI), non sea salt sulfate (3–4% OO, 35–40% SI), and MSA (1–2% OO, 11–12% SI). The chemical composition of WSOM encompasses secondary organic components with diverse behaviors: while alkylamine concentrations were higher in SI air masses, oxalic acid showed higher concentrations in the open ocean air. Our online single-particle mass spectrometry data exclude a widespread source from sea bird colonies, while the secondary production of oxalic acid and sulfur-containing organic species via cloud processing is suggested. We claim that the potential impact of the sympagic planktonic ecosystem on aerosol composition has been overlooked in past studies, and multiple eco-regions act as distinct aerosol sources around Antarctica.

中文翻译：

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多个海洋地理生态区的水溶性有机物对南极洲周围气溶胶的贡献。

我们对南极半岛、南奥克尼群岛和南乔治亚岛附近海域的气溶胶成分的尺寸分辨浓度进行了船载测量，证明了与不同生态区域相关的气溶胶特征。非甲磺酸水溶性有机物 (WSOM) 占气溶胶 PM _{1的 6–8% 和 11–22%}质量分别起源于公海（OO）和海冰（SI）区域。其他主要成分包括海盐（86–88% OO、24–27% SI）、非海盐硫酸盐（3–4% OO、35–40% SI）和 MSA（1–2% OO、11–12 ％SI）。WSOM 的化学成分包含具有不同行为的次生有机成分：虽然 SI 气团中的烷基胺浓度较高，但草酸在开阔的海洋空气中浓度较高。我们的在线单粒子质谱数据排除了来自海鸟群体的广泛来源，而建议通过云处理二次生产草酸和含硫有机物质。我们声称，在过去的研究中，交感浮游生态系统对气溶胶成分的潜在影响被忽视了，