• Ocean and Polar Research
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• v.23 no.2
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• pp.77-95
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• 2001

Temperature, salinity, nutrients, chlorophyll-a, and primary production were measured within the upper 200 m water column in the area around the South Shetland Islands in January, 2000. Surface temperature was relatively high in the Drake Passage north of the South Shetland Islands and low in the northeastern area of the Antarctic Peninsula. In contrast, surface salinity was low in the Drake Passage and increased toward the Antarctic Peninsula, reaching the maximum value in the northeastern area of the Antarctic Peninsula. Surface nutrients were low in the Drake Passage and high in the area near the South Shetland Islands. Surface chlorophyll-a was also low in the Drake Passage and near the Antarctic Peninsula and high in the area of the northern King George Island. The study area could be classified as four geographical zones based on the characteristic shape of the T/S diagrams;the Drake Passage, the Bransfield Strait, the mixed zone, and the Weddell Sea. Each geographical zone showed apparently different physical, chemical, and biological characteristics. Phytoplankton biomass was relatively low in the Drake Passage and the Weddell Sea and high in the Bransfield Strait and the mixed zone. The low phytoplankton biomass in the Weddell Sea could be explained by the low water temperature and deep surface mixing down to 200 m. The high grazing pressure and low availability of iron could be responsible for the low phytoplankton biomass in the Drake Passage.

• 한국지구물리탐사학회:학술대회논문집
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• 2005.05a
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• pp.139-144
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• 2005

Multichannel seismic survey has conducied along the South Scotia Ridge which is located in the northern part of Weddell sea, Antarctic sea, The South Scotia Ridge is part of continental crust extended from Antarctic Peninsula. It borders on Oceanic plates, the Scotia sea plate and Powell basin. Transtensional tectonics along the sinistral transform fault plate boundary led to the creation of the present tectonic geomorphology of the South Scotia Ridge. The fan-shaped deposits with angular unconformities in the central depression is interpreted as a divergent tectonic movement along the ridge.

• Journal of the Korean Geophysical Society
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• v.8 no.4
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• pp.215-219
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• 2005

Multichannel seismic survey has conducted along the South Scotia Ridge which is located in the northern part of Weddell sea, Antarctic sea. The South Scotia Ridge is part of continental crust extended from Antarctic Peninsula. It borders on Oceanic plates, the Scotia sea plate and Powell basin. Transtensional tectonics along the sinistral transform fault plate boundary led to the creation of the present tectonic geomorphology of the South Scotia Ridge. The fan-shaped deposits with angular unconformities in the central depression is interpreted as a divergent tectonic movement along the ridge.

• Tunnel and Underground Space
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• v.20 no.4
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• pp.241-251
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• 2010

The polar region is in the limelight for an academic worth as well as plenty of natural resources. The study on the polar region was reviewed for better understanding of the polar region and its rock properties. The antarctica has a windy and dry climate along with the lowest temperature on the earth. The thermal distribution according to depth in the area was reported: The freezing-thawing process was repeated in shallow depth, and the temperature falls down below zero under the specific depth. There is a great temperature difference between the atmosphere and rock. A research reported for the degree of weathering of the antarctic slope by using Schmidt hammer and Taffoni test. The rock specimens weathered by repeated freezing-thawing process were tested of the shore hardness and uniaxial compressive strength: The rock strength gradually decreased as the freezing-thawing process was repeated. The comprehensive mechanical properties of the polar region rocks and the relationship between the laboratory weathering test result and the real rock property change in the site remain as future research topics.

• Journal of the Korean Geophysical Society
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• v.9 no.4
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• pp.397-408
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• 2006

Due to the temporal and spatial variability of the warming at and near the Antarctic Peninsular, it is required to better understand local climate at the issued region. The purpose of the study are to characterize surface radiation, air temperature and wind direction and investigate their relations at the King Sejong Station near the Antarctic Peninsular during last three and half years. While the study site was a weak radiative energy sink (positive net radiation) with annual mean of 15-20 Wm-2, it played a role as a strong sink in summer (December to January) with mean of 85 Wm-2, a magnitude that was significantly larger than those at other surface covered with snow or ice in Antarctica. Monthly averaged air temperature ranged from -7.7-2.8oC and the variations of monthly averaged air temperature showed the distinct differences with year. Northwesterly, westerly and easterly were dominant and the variability of air temperature could be explained by the variability of the frequency of wind direction with cold easterly and warm northwesterly/northerly to some degree, which in turn influenced radiation budget through albedo in summer.

• The Korean Journal of Applied Statistics
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• v.28 no.5
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• pp.847-858
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• 2015

Deep-sea fishery in the Antarctic Ocean has been actively progressed by the developed countries including Korea. In order to prevent the environmental destruction of the Antarctic Ocean, related countries have established the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) and have monitored any illegal unreported or unregulated fishing. Fishing of tooth fish, an expensive fish, in the Antarctic Ocean has increased recently and high catches per unit effort (CPUE) of fishing boats, which is suspicious for an illegal activity, have been frequently reported. The data of CPUEs in a fishing area of the Antarctic Ocean often show an extreme Distribution or a mixture of two extreme distributions. This paper proposes an algorithm to detect an outlier of CPUEs by using the mixture of two extreme distributions. The parameters of the mixture distribution are estimated by the EM algorithm. Log likelihood value and posterior probabilities are used to detect an outlier. Experiments show that the proposed algorithm to detect outlier of the data can be adopted instead of simple criteria such as a CPUE is greater than 1.

• Parasites, Hosts and Diseases
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• v.33 no.3
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• pp.231-234
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• 1995

Anisakid larvae were found from the liver and stomach of the codfish (Notothenia negzecta) caught from the Antarctic Ocean, South Pole, where the Polar Research Center of The Korea Ocean Research and Development Institute is operating- Through observations by scanning electron (SEM) and light microscopy (LM), they were identified as the third stage larvae of Pseunotewnnovo necipiens, a potential agent of human codworm anisakiasis. They measured 25.0-28.5 mm in length, and 0.6-0.8 mm in width. The SEM revealed a prominent boring tooth, three lips, and excretory pore at the anterior end, and a small but prominent mucron at the posterior end. From whole mounts and cross sections of the larvae the ventriculus, intestinal cecum and a Renette cell were found characteristically at the same plane. Raw eating of the codfish caught from the Antarctic Ocean near the South Pole should be avoided so as to prevent human codworm anisakiasis in this area.

• Proceedings of the Acoustical Society of Korea Conference
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• 1998.06c
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• pp.483-486
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• 1998

한국해양연구소 온누리호에 장착된 에어건 배열에서 건 간격에 따른 빔 패턴 변화를 확인하였으며 남극해역에서 획득된 탐사자료와 비교하였다. 컴퓨터 모의과정과 배열 이론을 이용하여 신호진폭 및 빔 폭 변화 등을 시간 및 주파수 영역에서 분석하였다. 154 Hz에서 송이배열 (cluster array) 및 폭 배열 (wide array)의 빔 폭 변화는 배열 형태보다는 건 간격에 큰 영향을 받고 있어 배열 형태가 달라도 빔 폭은 서로 유사하게 변한다. 건 간격이 클수록 송이배열이 90$^{\circ}$의 빔 패턴에서 주엽 (mainlobe)이 최대치가 되는 것과는 달리 폭배열은 0$^{\circ}$에서 최대치를 나타내며 부엽 (sidelobe)은 건 간격과 무관하게 나타난다. 두 배열의 선형간섭이 점차 줄어드는 건 간격은 2.43 m이다. 남극해 탐사자료는 건 간격이 증가함에 따라 주신호 진폭은 약하게 기포는 강하게 증가한다. 이러한 결과는 빔 패턴 변화에서도 마찬가지로 나타나는데 건 간격이 클수록 주엽의 빔 폭이 점차 좁아져 강한 빔 패턴을 나타냄으로서 남극 탐사자료와 서로 잘 일치한다.

• 한국지구물리탐사학회:학술대회논문집
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• 2010.10a
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• pp.33-33
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• 2010

남극 반도 북부에 설치된 임시지진관측소와 세종기지 지진관측소에서 관측된 원격지진을 이용하여 P파의 상부 맨틀 속도 구조 모델링을 하였다. 사용된 자료는 1997년부터 1999년까지 실시된 SEPA (the Seismic Experiment in Patagonia and Antarctica) 연구에 설치된 7대의 임시 광대역 관측소와 IRIS/GSN 영구 관측소인 PMSA, 그리고 칠레 Jubany 기지(JUBA)와 아르헨티나의 Esperanza 기지(ESPZ)에 설치된 광대역 지진관측소에서 관측된 자료를 사용하였다. 모든 관측소가 남극 반도와 남 셔틀랜드 군도에 위치하고 있기 때문에 매우 낮은 신호대 잡음비를 보여주고 있다. 모델링에 사용된 자료는 95개 지진에서 축출한 347개의 P파와 PKP파로 실시되었다. 역산된 상부 맨틀의 속도 구조는 남 셔틀랜드 군도의 북쪽에서 빠르고 브랜스필드 스트레이 지역에서는 느린 속도 구조를 보여주고 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.11a
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• pp.1115-1117
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• 2020

환경 문제는 사람들이 직접적으로 보지 못하면 쉽게 이해하기 어렵다. 그리고 오랜 시간 동안 아주 조금씩 환경 파괴가 발생하는 경우가 많기 때문에, 실질적으로 환경 문제를 체감하는 것이 쉽지 않다. 본 연구에서는 몰입형 가상현실 시스템을 이용해서 기후변화의 원인인 지구온난화로 인해 북극과 남극의 바다 빙하가 녹고 있는 문제를 체험할 수 있도록 Melting Sea Ice 를 개발하였다. 사용자들은 몰입형 가상현실 장치를 착용하고 시간의 흐름에 따라 남극 북극 빙하가 녹은 모습과 해빙에 따른 생태 환경의 변화를 직접 돌아다니면서 관찰할 수 있다. 본 연구에서는 Melting Sea Ice 가상현실 콘텐츠를 통하여 기후 변화로 인한 환경 파괴 문제를 직관적으로 인식시키고 환경 문제를 해결하고자 하는 동기부여를 목적으로 두고 있다.