First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn
We investigate the distribution of dimethyl sulfide (DMS) in the Southern Ocean’s (50° W to 170° 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 Apr...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Atmosphere |
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| Online Access: | https://www.mdpi.com/2073-4433/12/1/122 |
| _version_ | 1797410677045854208 |
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| author | Intae Kim Miming Zhang Kitae Kim Keyhong Park |
| author_facet | Intae Kim Miming Zhang Kitae Kim Keyhong Park |
| author_sort | Intae Kim |
| collection | DOAJ |
| description | We investigate the distribution of dimethyl sulfide (DMS) in the Southern Ocean’s (50° W to 170° 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 σ) 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. |
| first_indexed | 2024-03-09T04:33:43Z |
| format | Article |
| id | doaj.art-2d01aa6bae9b48a48468342657a8546a |
| institution | Directory Open Access Journal |
| issn | 2073-4433 |
| language | English |
| last_indexed | 2024-03-09T04:33:43Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Atmosphere |
| spelling | doaj.art-2d01aa6bae9b48a48468342657a8546a2023-12-03T13:31:52ZengMDPI AGAtmosphere2073-44332021-01-0112112210.3390/atmos12010122First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral AutumnIntae Kim0Miming Zhang1Kitae Kim2Keyhong Park3Marine Environmental Research Center, Korea Institute of Ocean Science and Technology (KIOST), Busan 49111, KoreaKey Laboratory of Global Change and Marine-Atmospheric Chemistry, Third Institute of Oceanography, Xiamen 361005, ChinaKorea Polar Research Institute (KOPRI), Incheon 21990, KoreaKorea Polar Research Institute (KOPRI), Incheon 21990, KoreaWe investigate the distribution of dimethyl sulfide (DMS) in the Southern Ocean’s (50° W to 170° 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 σ) 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.https://www.mdpi.com/2073-4433/12/1/122dimethyl sulfideSouthern Oceanaustral autumnclimatehigh-frequency underway observation |
| spellingShingle | Intae Kim Miming Zhang Kitae Kim Keyhong Park First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn Atmosphere dimethyl sulfide Southern Ocean austral autumn climate high-frequency underway observation |
| title | First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn |
| title_full | First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn |
| title_fullStr | First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn |
| title_full_unstemmed | First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn |
| title_short | First High-Frequency Underway Observation of DMS Distribution in the Southern Ocean during Austral Autumn |
| title_sort | first high frequency underway observation of dms distribution in the southern ocean during austral autumn |
| topic | dimethyl sulfide Southern Ocean austral autumn climate high-frequency underway observation |
| url | https://www.mdpi.com/2073-4433/12/1/122 |
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