Characterization of the primary productivity using a year-long high resolution sediment trap experiment in the southwestern part of the East/Japan Sea

Title
Characterization of the primary productivity using a year-long high resolution sediment trap experiment in the southwestern part of the East/Japan Sea
Author(s)
김석현; 홍기훈; 김영일; 정창수; 최기영; 김영호
KIOST Author(s)
Kim, Suk Hyun(김석현)KIM, YOUNG-IL(김영일)Chung, Chang Soo(정창수)Ka, Young Choi(최가영)
Publication Year
2013-08-27
Abstract
The southwestern East/Japan Sea is one of the worlds most productive fishing grounds that is readily visible from the space born satellites day-night band due to bright lights emitted from dense assemblage of fishing fleet. Traps were deployed to collect sinking particles in the depths of 1,020 m and 2,100 m at the inter-plain gap between Ulleung and Dok islands (37°25.77′N, 132°30.27′E, 2300 m) in 1999 with shorter than 10 days sampling interval. The water temperature and current at 350 m depth using RCM 7 at the site adjacent to the sediment trap mooring site were also utilized to aid our data analysis. This high resolution temporal observations showed many important characteristics related to the productivity of the southwestern East/Japan Sea: 1) Ulleung Warm Eddy enhanced primary productivity as evidenced by a simultaneous variation in water temperature at 100 m and particulate organic carbon fluxes at 1,020 m depth. 2) Siliceous phytoplankton species dominated spring and autumn blooms. The ratio of biogenic silica flux to particulate organic carbon flux increased during these two seasons 3) Calcareous productivity was observed during August when surface water temperature was the highest when the ratio of calcium flux to aluminum flux peaked its maximum 4) Small sized primary producers such as nano- or pico- plankton dominated in summer. Dissolution of sinking particulate organic carbon appearedeployed to collect sinking particles in the depths of 1,020 m and 2,100 m at the inter-plain gap between Ulleung and Dok islands (37°25.77′N, 132°30.27′E, 2300 m) in 1999 with shorter than 10 days sampling interval. The water temperature and current at 350 m depth using RCM 7 at the site adjacent to the sediment trap mooring site were also utilized to aid our data analysis. This high resolution temporal observations showed many important characteristics related to the productivity of the southwestern East/Japan Sea: 1) Ulleung Warm Eddy enhanced primary productivity as evidenced by a simultaneous variation in water temperature at 100 m and particulate organic carbon fluxes at 1,020 m depth. 2) Siliceous phytoplankton species dominated spring and autumn blooms. The ratio of biogenic silica flux to particulate organic carbon flux increased during these two seasons 3) Calcareous productivity was observed during August when surface water temperature was the highest when the ratio of calcium flux to aluminum flux peaked its maximum 4) Small sized primary producers such as nano- or pico- plankton dominated in summer. Dissolution of sinking particulate organic carbon appeared
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/26817
Bibliographic Citation
2013 Goldshcmidt Conference, 2013
Publisher
Goldshcmidt
Type
Conference
Language
English
Publisher
Goldshcmidt
Related Researcher
Research Interests

marine pollution management,marine biogeochemistry,marine environmental radioactivity,해양오염관리,해양물질순환,해양환경방사능

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