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- W3196015346 abstract "Antarctica and the surrounding Southern Ocean act as an important sink in the global mercury cycle; however, corresponding studies of atmospheric mercury species in these regions are still scarce. Here, we report large-scale observations of atmospheric gaseous elemental mercury (GEM) and gaseous oxidized mercury (GOM) in the Antarctic marine boundary layer (MBL) taken during a summer cruise. There is large variability in the spatial distribution of GOM, which is likely attributable to the diverse land surface types, including coastal Antarctica, sea-ice region, and oceanic region, along the cruise route. In coastal Antarctica, the highest GOM level (56.23 ± 47.74 pg·m−3) might be attributed to the significant in-situ oxidation there. Significant in-situ oxidation of GEM could also occur in the sea-ice region, causing the significant increase of GOM (up to 87.01 pg·m−3), while the uptake of the high content of sea-salt aerosols in sea-ice regions might efficiently eliminate GOM in the air, resulting in generally lower content of GOM (13.10 ± 14.48 pg·m−3) in the sea-ice region. In the oceanic region, the lowest level of GOM (3.95 ± 4.69 pg·m−3) is due to both the uptake of sea-salt aerosols and the seasonal melting of first-year sea-ice. This study provides insight to understand the mechanisms of the atmospheric mercury cycle in various land surface types in the Antarctic MBL." @default.
- W3196015346 created "2021-08-30" @default.
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- W3196015346 date "2021-09-01" @default.
- W3196015346 modified "2023-10-12" @default.
- W3196015346 title "Spatial Distribution of Atmospheric Mercury Species in the Southern Ocean" @default.
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- W3196015346 doi "https://doi.org/10.1029/2021jd034651" @default.
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