Sinking particle flux in the sea ice zone of the Amundsen Shelf, Antarctica
- Kim, Minkyoung
- Hwang, Jeomshik
- Kim, Hyung J.
- Kim, Dongseon
- Yang, Eun J.
- Ducklow, Hugh W.
- Hyoung, S. La
- Lee, Sang H.
- Park, Jisoo
- Lee, SangHoon
DOIAbstract
AbstractWe have examined the flux, biogenic composition, and isotopic values of sinking particles collected by a time-series sediment trap deployed in the sea ice zone (SIZ) of the Amundsen Sea from January 2011 for 1 year. The major portion of the particle flux occurred during the austral summer in January and February when sea ice concentration was reduced to <60%. Biogenic components, dominated by opal (~78% of the biogenic components), accounted for over 75% of particle flux during this high-flux period. The dominant source of sinking particles shifted from diatoms to soft-tissued organisms, evidenced by high particulate organic carbon (POC) content (>30%) and a low bio-Si/POC ratio (<0.5) during the austral winter. CaCO3 content and it...
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