Sediment Oxygen Consumption Rate and Hydrogen Sulfide Release by Dissolved Oxygen Depletion in Hypoxic Area of the Gamak Bay, Korea

Title
Sediment Oxygen Consumption Rate and Hydrogen Sulfide Release by Dissolved Oxygen Depletion in Hypoxic Area of the Gamak Bay, Korea
Author(s)
이태희; 손영백
KIOST Author(s)
Lee, Taehee(이태희)Son, Young Baek(손영백)
Publication Year
2016-11-05
Abstract
This study investigated sediment oxygen consumption rates and geochemical characteristics of sediment in hypoxic area of the Gamak Bay based on the chamber experiments and geochemical analyses. The organic carbon contents of surface sediment in the Gamak Bay showed that the inner bay area has higher organic carbon content than those of the outer bay. They toward the outer bay, contents dropped off. The vertical profiles of calcium carbonate (CaCO3) content at piston core sediment assumed that the hypoxia have been frequently occurred during past century in the northern inner bay. The benthic chamber experiments were conducted in February, May, August and November 2010, 2011 in the hypoxic area of the Gamak Bay. In the sediment incubation experiment with chamber at site C3 in the northern inner bay and site C17 in the southern outer bay, the sediment oxygen consumption rate ranged from 3.98 mmol m-2 d-1 to 12.43 mmol m-2 d-1 and 3.28 mmol m-2 d-1to 8.18 mmol m-2 d-1, respectively. When the oxygen was completely depleted, the toxic hydrogen sulfide was released with 1.38 mmol m-2 d-1 and 1.3 mmol m-2 d-1, respectively.t in the Gamak Bay showed that the inner bay area has higher organic carbon content than those of the outer bay. They toward the outer bay, contents dropped off. The vertical profiles of calcium carbonate (CaCO3) content at piston core sediment assumed that the hypoxia have been frequently occurred during past century in the northern inner bay. The benthic chamber experiments were conducted in February, May, August and November 2010, 2011 in the hypoxic area of the Gamak Bay. In the sediment incubation experiment with chamber at site C3 in the northern inner bay and site C17 in the southern outer bay, the sediment oxygen consumption rate ranged from 3.98 mmol m-2 d-1 to 12.43 mmol m-2 d-1 and 3.28 mmol m-2 d-1to 8.18 mmol m-2 d-1, respectively. When the oxygen was completely depleted, the toxic hydrogen sulfide was released with 1.38 mmol m-2 d-1 and 1.3 mmol m-2 d-1, respectively.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/24366
Bibliographic Citation
PICES 2016 annual meeting, pp.322, 2016
Publisher
PICES
Type
Conference
Language
English
Publisher
PICES
Related Researcher
Research Interests

Marine Geochemistry,Marine Environment,Oceanography,해양지화학,해양환경,해양학

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