https://repository.kopri.re.kr/handle/201206/5463 2026-04-21T09:07:17Z 2026-04-21T09:07:17Z Tae-Wook Kim Christoper L. Sabine Toste Tanhua Kitack Lee Kim, Hyun-cheol Richard A. Freely https://repository.kopri.re.kr/handle/201206/6049 2022-03-24T07:11:32Z 2011-01-01T00:00:00Z

Title: Role of marginal seas in absorbing and storing fossil fuel Co2 Authors: Tae-Wook Kim; Christoper L. Sabine; Toste Tanhua; Kitack Lee; Kim, Hyun-cheol; Richard A. Freely Abstract: We review data on the absorption of anthropogenic CO2 by Northern Hemisphere marginal seas (Arctic Ocean, Mediterranean Sea, Sea of Okhotsk, and East/Japan Sea) and its transport to adjacent major basins, and consider the susceptibility to recent climatic change of key factors that influenceCO2 uptake by these marginal seas. Dynamic overturning circulation is a common feature of these seas, and this effectively absorbs anthropogenic CO2 and transports it from the surface to the interior of the basins. Amongst these seas only the East/Japan Sea has no outflow of intermediate and deep water (containing anthropogenic CO2) to an adjacent major basin;the others are known to be significant sources of intermediate and deep water to the open ocean. Consequently, only the East/Japan Sea retains all the anthropogenic CO2 absorbed during the anthropocene. Investigations of the properties of the water column in these seas have revealed a consistent trend of waning water column ventilation over time, probably because of changes in local atmospheric forcing. This weakening ventilation has resulted in a decrease in transport of anthropogenic CO2 from the surface to the interior of the basins, and to the adjacent open ocean. Ongoing measurements of anthropogenic CO2, other gases and hydrographic parameters in these key marginal seas will provide information on changes in global oceanic CO2 uptake associated with the predicted increasing atmospheric CO2 and future global climate change.We also review the roles of other marginal seas with no active overturning circulation systems in absorbing and storing anthropogenic CO2. The absence of overturning circulation enables anthropogenic CO2 to penetrate only into shallowdepths, resulting in less accumulationof anthropogenicCO2 in these basins.As a consequence of their proximity to populated continents, these marginal seas are particularly vulnerable to human-induced perturbations. Maintaining observation programs will make it possibl

2011-01-01T00:00:00Z Kim, Hyun-cheol https://repository.kopri.re.kr/handle/201206/8534 2022-03-24T07:13:32Z 2010-01-01T00:00:00Z

Title: KOPRI (Korea Polar Research Institute) and Research with Icebreaker "ARAON" Authors: Kim, Hyun-cheol Abstract: In my presentation, I will talk about a brief introduction of KOPRI and my future plan of research with icebreaker "ARAON". Korea's polar research history began in 1987 with Polar Research Center of Ocean Research Institute, which was set up as part of Antarctic station construction program. Since that, it expanded from a mere Polar Research Laboratory to Polar Research Institute, a subsidiary research unit of Korea Ocean Research Institute. Korea Polar Research Institute is now a real international polar re search institute operating King Sejong Station in Antarctic and Dasan Station in Arctic. In addition, icebreaker "ARON" built 2 Nov. 2009, succeed the first Antarctic and Arctic sea survey in recently. And, we have lots tasks to complete building up of Jangbogo Station, which is 2nd station in Antarctic and reconstruction of Dasan Station in arctic in order to build up such infrastructures of polar research. ARAON can cover pole to pole through equatorial; hence numerous ground truth data can be gathered along with ARAON track, including chemical data in water and in atmosphere, and biological data in water. For example, on remote sensing, sea surface reflectance and temperature are recorded automatically, and about 7m-depth salinity as well. Therefore, those data can be used if we have any idea about satellite data calibration and validation, and develop of new algorithm as well. International collaboration should be needed to use these data efficiently.

2010-01-01T00:00:00Z Im-Sang Oh Jisoo Park Sinjae Yoo Kim, Hyun-cheol https://repository.kopri.re.kr/handle/201206/6246 2022-03-24T07:11:47Z 2010-01-01T00:00:00Z

Title: Variability of SeaWiFs chlorophyll-a in the southwest Atlantic sector of the Southern Ocean: Strong topographic effects and weak seasonality Authors: Im-Sang Oh; Jisoo Park; Sinjae Yoo; Kim, Hyun-cheol Abstract: This study examined 11-year(1997？2008) weekly and monthly time series of satellite-observed oceancolor to underst and the dominant temporal and spatial patterns of chlorophyll-a in the southwest Atlantic sector of the Southern Ocean. Using empirical orthogonal function analysis and k-means classi？cation, we classi？ed the study area into eight regions, which were in good accordance with the oceanographic and topographic features. Examination of the chlorophyll-a time series in each region revealed that contrary to our expectation, regular seasonal phytoplankton blooms were observed only in a limited area. Of the eight regions, only two showed typical seasonal blooms, and one showed weak seasonality, whereas other regions exhibited irregular seasonal blooms of variable duration. We attribute the absence of regularity in seasonal blooms to relatively shallow winter mixing, which would prevent entrainment of limiting micronutrients such as iron and silicate. In the southwest Atlantic sector of the Southern Ocean, topographic effects and sea ice maybe the most important factors controlling primary productivity. In the South Georgia region, chlorophyll-a showed a signi？cant correlation with geostrophic current velocity, indicating that topographic effects depend on the interaction of current strength and topographic structure. Interannual variability of the surface chlorophyll in some regions also revealed longer periodicity(~6years). The periodicity seemed to be related to ElNin～o？Southern Oscillation and to sea-ice dynamics in？uenced by the Antarctic Circumpolar Current.

2010-01-01T00:00:00Z Kim, Hyun-cheol Kim, Yi Seul 윤종필 김성권 박정언 이승겸 Kim, Kyung-Mi Han, Jung Min 이진환 https://repository.kopri.re.kr/handle/201206/8001 2022-03-24T07:13:05Z 2010-01-01T00:00:00Z

Title: Web-based Satellite Analysis System Authors: Kim, Hyun-cheol; Kim, Yi Seul; 윤종필; 김성권; 박정언; 이승겸; Kim, Kyung-Mi; Han, Jung Min; 이진환 Abstract: 최근 인공위성을 이용한 해양 관측기술의 발달로 지구온난화 및 기후변화 등 전지구규모의 환경변화 관측이 가능해졌다. 그러나, 이러한 첨단 기술의 활용이 국내에서는 적은 편이다. 게다가 일부전문가들만 이해하는 자료형식 및 분석 방법에 의해 그 활용범위가 제한적이다. NASA의 경우 생산된 위성자료를 전공자를 포한함 일반인들이 쉽게 접근해서 사용할 수 있는 분석 시스템을 웹을 통해 제공하고 있다 (예, GIOVANNI). "위성자료의 공공활용"이라는 목적하에 해색인공위성자료 등을 일반인이 web을 통해 검색-분석하고, 분석된 자료를 download 할 수 있는 시스템을 극지연구소 원격탐사실에서 구축하고 있다. 현재 NASA에서 배포하고 있는 level 3 해색자료를 비롯하여, 해수온, 해빙 및 해상풍 자료 등을 인터넷을 통해 검색(시기, 지역)하여 원하는 형태의 자료(영상 합성, 시계열자료, 통계분석)로 출력하여 download 할 수 있는 web 기반 위성자료 분석 시스템을 구축하였으며, 그 1단계 진행결과를 본 발표에서 보여주고자 한다. 현재(2010년) 2단계로 고해상 자료 분석 및 연구목적 따른 통계처리 기법을 추가하는 중이다. 이러한 시스템을 통해 비전공자들이 각자의 연구와 목적에 따라 인공위성자료를 쉽게 사용할 수 있는 환경을 제공 하고자 한다. 본 연구 사업은 한국항공우주연구원에서 추진 중인 "위성자료 공공활용사업"에서 연구비를 지원받았다

2010-01-01T00:00:00Z