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首页> 外文期刊>Atmospheric Chemistry and Physics Discussions >Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer
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Concentrations, particle-size distributions, and dry deposition fluxes of aerosol trace elements over the Antarctic Peninsula in austral summer

机译：在南极夏季南极半岛的气溶胶痕量元素的浓度，粒度分布和干沉积势

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Size-segregated particulate air samples were collected during the austral summer of 2016–2017 at Palmer Station on Anvers Island, western Antarctic Peninsula, to characterize trace elements in aerosols. Trace elements in aerosol samples – including Al, P, Ca, Ti, V, Mn, Ni, Cu, Zn, Ce, and Pb – were determined by total digestion and a sector field inductively coupled plasma mass spectrometer (SF-ICP-MS). The crustal enrichment factors (EF crust ) and k -means clustering results of particle-size distributions show that these elements are derived primarily from three sources: (1)?regional crustal emissions, including possible resuspension of soils containing biogenic P, (2)?long-range transport, and (3)?sea salt. Elements derived from crustal sources (Al, P, Ti, V, Mn, Ce) with EF crust 1.8 ? μm ) and peaked around 4.4? μm in diameter, reflecting the regional contributions. Non-crustal elements (Ca, Ni, Cu, Zn, Pb) showed EF crust 10 . Aerosol Pb was primarily dominated by fine-mode particles, peaking at 0.14–0.25? μm , and likely was impacted by air masses from southern South America based on air mass back trajectories. However, Ni, Cu, and Zn were not detectable in most size fractions and did not present clear size patterns. Sea-salt elements (Ca, Na + , K + ) showed a single-mode distribution and peaked at 2.5–4.4? μm . The estimated dry deposition fluxes of mineral dust for the austral summer, based on the particle-size distributions of Al measured at Palmer Station, ranged from 0.65 to 28?mg?m ?2 ?yr ?1 with a mean of 5.5±5.0 ?mg?m ?2 ?yr ?1 . The estimated dry deposition fluxes of the target trace elements in this study were lower than most fluxes reported previously for coastal Antarctica and suggest that atmospheric input of trace elements through dry deposition processes may play a minor role in determining trace element concentrations in surface seawater over the continental shelf of the western Antarctic Peninsula.
机译：在南极洲南极半岛的帕尔默站在2016 - 2017年南部2016 - 2017年澳大利亚夏季收集了尺寸隔离的微粒空气样本，以表征气溶胶中的微量元素。气溶胶样品中的痕量元素 - 包括Al，P，Ca，Ti，V，Mn，Ni，Cu，Zn，Ce和Pb - 由总消化和扇区电感耦合等离子体质谱仪（SF-ICP-MS ）。粒径分布的地壳浓缩因子（EF壳）和k-ems集群结果表明，这些元素主要来自三个来源：（1）？区域地壳排放，包括可能的含有生物生物的土壤中的破坏性（2） ？远程运输，（3）？海盐。具有EF Crust 1.8的地壳源（Al，P，Ti，V，Mn，Ce）的元素源自出壳（Al，P，Ti，V，Mn，Ce）？ μm）并达到4.4左右？直径μm，反映了区域贡献。非地壳元素（Ca，Ni，Cu，Zn，Pb）显示EF Crust＆ 10。气溶胶Pb主要由微型颗粒占主导地位，达到0.14-0.25的峰值？ μm，并且可能受到南美洲南美洲的空气群众的影响，基于空气质量反射轨迹。然而，在大多数尺寸的级分中，Ni，Cu和Zn在大多数级别中没有检测到并且没有呈现透明尺寸的图案。海盐元素（CA，Na +，K +）显示单模分布，并在2.5-4.4达到峰值？ μm。基于在Palmer站测量的Al的粒度分布的亚洲夏季矿物粉尘的估计干沉积势率，范围为0.65至28Ω·mg？2？2？Yr？1，平均为5.5±5.0？ mg？m？2？YR？1。本研究中靶痕量元素的估计干沉沉液低于前南极洲先前报告的大多数势次，并表明通过干沉积过程的微量元素的大气输入可能在确定表面海水中的痕量元素浓度方面发挥着小的作用西南南极半岛的大陆架子。

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