First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn
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Title
- First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn
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Author(s)
- Kim, Intae; Zhang, Miming; Kim, Kitae; Park, Keyhong
- KIOST Author(s)
- Kim, Intae(김인태)
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Alternative Author(s)
- 김인태
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Publication Year
- 2021-01
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Abstract
- We investigate the distribution of dimethyl sulfide (DMS) in the Southern Ocean's (50 degrees W to 170 degrees W) surface water, including the Antarctic Peninsula and the marginal sea ice zone (MIZ) in the Ross and Amundsen Seas. This is the first high-frequency observation conducted in the austral autumn (in April) in the Southern Ocean. The mean DMS concentration was 2.7 +/- 2.5 nM (1 sigma) for the entire study area. Noticeably enhanced DMS (5 to 28 nM) concentrations were observed in the MIZ around the Ross and Amundsen Seas and the coastal regions in the Antarctic Peninsula; this could be attributed to biological production of local ice algae, which appears to be supplied with nutrients from glacial or sea ice melt water. These observed DMS inventories were significantly higher (an order of magnitude) than current climatological DMS inventories. The local DMS sources being transported outward from the polynyas, where strong bloom occurs during summer, could result in larger discrepancies between observed DMS and climatological DMS in the MIZ area (in the Amundsen Sea). Overall, this study is the first to highlight the significance of the underestimation of current DMS fluxes in the austral autumn, which consequently results in significant errors in the climate models.
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ISSN
- 2073-4433
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URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/39524
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DOI
- 10.3390/atmos12010122
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Bibliographic Citation
- ATMOSPHERE, v.12, no.1, pp.1 - 10, 2021
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Publisher
- MDPI
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Subject
- Climate models; Sea ice; Sulfur compounds; Antarctic Peninsula; Biological production; Coastal regions; Dimethyl sulfide; High frequency HF; Ice-melt water; Marginal seas; Southern ocean; Surface waters
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Keywords
- dimethyl sulfide; Southern Ocean; austral autumn; climate; high-frequency underway observation
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Type
- Article
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Language
- English
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Document Type
- Article
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