GEO DATA

Sosul Cho

2 Articles

Sea Surface CO₂ Measurements on the R/V ISABU in the Northwestern Pacific in October 2019: Nayeon Kang, Sosul Cho, Seon-Eun Lee; GEO DATA. 2022;4(3):8-14. Published online September 30, 2022; DOI: https://doi.org/10.22761/DJ2022.4.3.002

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Abstract PDF: The ocean takes up anthropogenic carbon dioxide (CO₂) emitted into the atmosphere. The oceanic CO₂ uptake shows seasonal and regional differences depending on numerous factors. We investigated distributions of atmospheric and sea surface CO₂ in the Northwestern Pacific using the continuous underway pCO2 measuring system equipped on the Research Vessel ISABU of Korea Institute of Ocean Science and Technology. During the cruise, 3,597 data of seawater CO₂ were obtained with sea surface temperature (SST), sea surface salinity (SSS), and GPS information for 13 days from October 4 to 17, 2019. Through the differences in CO₂ concentrations between seawater and the atmosphere, we confirmed that CO₂ concentrations of the sea surface were lower than those of the atmosphere in most of the surveyed areas. Higher SST and lower SSS were observed in the lower latitude area than 17°N in Philippine Sea, but latitudinal variation of CO₂ concentration was not significant.

Atmospheric and Surface Seawater CO2 Measurements on R/V ISABU in the Western North Pacific in the Summer of 2018: Seon-Eun Lee, Sosul Cho; GEO DATA. 2021;3(3):8-15. Published online September 30, 2021; DOI: https://doi.org/10.22761/DJ2021.3.3.002

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The ocean takes up approximately 24% of anthropogenic carbon dioxide (CO₂) emitted into the atmosphere in a year. The oceanic CO₂ uptake shows regional and seasonal differences depending on physical and chemical characteristics of seawater and biological activities (such as CO₂ fixation). In the tropical Western North Pacific, the surface water temperature is high, the supply of deep water is limited, and tropical cyclones usually pass in summer. We investigated atmospheric and sea surface CO₂ concentrations in this area using the continuous underway pCO2 measuring system equipped on the Research Vessel ISABU of Korea Institute of Ocean Science and Technology for about 21 days from August 29 to September 19, 2018. During the cruise, 9,367 CO₂ data were obtained from this measuring system with temperature, salinity, and GPS information. Higher CO₂ concentrations of the surface seawater than those of the atmosphere were observed in the areas of 22°N-23.5°N and 29°N-35°N where CO₂ was emitted into the atmosphere, while most of the areas between 17.5°N and 20.5°N were sinks for the atmospheric CO₂. This dataset can be used for future research on the distribution of partial pressure of carbon dioxide over the global ocean surface.

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Sea Surface CO2 Measurements on the R/V ISABU in the Northwestern Pacific in October 2019
Nayeon Kang, Sosul Cho, Seon-Eun Lee
GEO DATA.2022; 4(3): 8. CrossRef

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