• 안보군사학연구
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• 통권5호
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• pp.173-202
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• 2007

After successful nuclear tests Pakistan launched a more severe surprise attack toward India than before. It is highly possible that North Korea will adopt this Pakistan military strategy if it is armed with nuclear weapons. The North Korean forces armed, with nuclear bombs could make double its war capability through strengthening aggressive force structure and come into effect on blocking reinforcement of the US forces at the initial phase of war time. Therefore we may regard that Pyongyang's nuclear arming is a major one of various factors which increase possibility of waging a conventional warfare or a nuclear war. North Korea's high self-confidence after nuclear arming will heighten tension on the Korean Peninsula via aggressive military threat or terror toward South Korea, and endeavor to accomplish its political purpose via low-intensity conflicts. For instance, nuclear arming of the Pyongyang regime enforces the North Korean forces to invade the Northern Limit Line(NLL), provoke naval battles at the West Sea, and occupy one or two among the Five Islands at the West Sea. In that case, the South Korean forces will be faced with a serious dilemma. In order to recapture the islands, Seoul should be ready for escalating a war. However it is hard to imagine that South Korea fights with North Korea armed with nuclear weapons. This paper concludes that the Pyongyang regime after nuclear arming strongly tends to occupy superiority of military strategy and wage military provocations on the Korean Peninsula.

• 한국수산과학회지
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• 제57권4호
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• pp.380-388
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• 2024

This study investigated the sexual maturation of the marbled flounder Pseudopleuronectes yokohamae, a commercially important flatfish species, through monthly sampling from the coastal waters of Pohang in the East Sea of Korea in 2022. We analyzed monthly changes in total length (TL), gonadosomatic index, maturity stage, and 50%, 75%, and 97.5% group maturity based on visual assessments and histological analysis of the gonads. The spawning period was determined to be from December to May. The TL at 50% maturity was 26.4 cm for females and 24.8 cm for males. These findings provide a basis for developing resource management strategies for Pleuronectidae.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2003년도 추계종합학술대회
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• pp.339-342
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• 2003

1993년에서 1997년까지의 위성고도계 자료(Topex/Poseidon)를 이용하여 한반도 주변해역의 해면 변화와 표층흐름을 조사하였다. 해면변화를 보면, 동해에 비해서 서해와 남해는 항상 상대적으로 높았다. 전 조사 기간에 걸쳐서 서해는 북부와 남부 해역에서 각각20-30cm와 18-24cm의 변화범위를 보였으며, 남해는 제주도 북서부 해역에서는 15-20cm 그리고 쓰시마섬 남서부 해역에서는 10-15cm의 변화범위를 각각 나타내었다. 서해의 경우에 황해난류의 표층 유입류와 해저 지형류의 영향을 받아 높은 변화를 보였다. 남해의 경우는 변화가 일어나는 두 곳 모두가 근원적으로는 쿠로시오 해류의 흐름에서 분기된 지류들의 흐름(제주난류와 동한난류) 때문에 해면변화를 보였다. 표층 순환은 동해에서 북한한류, 동한난류와 쓰시마 난류와 관련한 세가지 와류운동이 두드러지게 나타났다. 와류운동은 기본적으로 표층 순환에서 해류의 영향을 받았다; 원산만 앞바다의 반시계방향(0.03 cm/sec)의 흐름은 북한한류, 울릉도 남서쪽 해역의 시계방향(0.06 cm/sec)의 흐름은 동한난류, 그리고 쓰시마섬 북서쪽 해역은 쓰시마 난류와 각각 관계되어있는 것으로 보인다.

• 한국지형학회지
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• 제23권1호
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• pp.61-75
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• 2016

This study aims to reconstruct sea level change and paleogeomorphology since the middle Holocene by diatom analysis and 14C-dating from the sedimentary facies of three trenches on alluvial plain of Taehwa River, Taehwa-dong, Ulsan-si, South Korea. The Taewha-dong area was a narrow bay located between Bangeojin and eatuary of Taehwa River was a narrow bay which has been detached from the open sea during middle Holocene. Taewa-dong area at bay area was developed into alluvial plain by the sediments had been come from the Taewa river basin. The sea level change during the middle Holocene effected on the development of Taewha-dong alluvial plain and its information is included in the sediment facies.

• 신재생에너지
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• 제1권1호
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• pp.44-53
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• 2005

To understand general status of the national wind environment and to distinguish potential areas to be developed as a largescale wind farm, a synoptic wind map of the Korean Peninsula is established by processing remote sensing data of the satellite, NASA QuikSCAT which Is deployed for the SeaWinds Project since 1999. According to the validation results obtained by comparing with the measurement data of marine buoys of KMA(Korea Meteorological Administration), the cross-correlation factor Is greatly Improved up to 0.87 by blending the sea-surface dat3 of QuikSCAT with NCEP/NCAR CDAS data. It is found from the established synoptic wind map that the wind speed in winter is prominent temporally and the South Sea shows high energy density up to the wind class 6 spatially. The reason is deduced that the northwest winds through the yellow Sea and the northeast winds through the East Sea derived by the low-pressure developed in Japan are accelerated passing through the Korea Channel and formed high wind energy region in the South Sea; the same trends are confirmed by the statistical analysis of meteorological observation data of KMA.

• 수산해양기술연구
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• 제52권4호
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• pp.325-338
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• 2016

Properties of aggregation and spatial distribution of fish were examined based on three lines in the South Sea of Korea using three frequencies (18, 38, and 120 kHz) of a scientific echosounder. The vertical distribution of fish was displayed using acoustic biomass namely nautical area scattering coefficient (NASC). As a result, at 120 kHz high NASC showed from water surface to 20 meters in deep while at 18 and 38 kHz very high NASC presented in 70 ~ 90 meters in depth, especially at line 3. Among three lines, the line 2 had lowest NASC. The horizontal distribution of fish using three frequencies together exhibited high NASC between the eastern South Sea and center of South Sea. In especial, NASC ($801{\sim}1,920m^2/n{\cdot}mile^2$) was observed along coastal waters from Busan to Tongyeong, Geoje, and Namhae. In regard with the property of aggregation of fish schools, the volume back-scattering strength ($S_V$) of three lines presented close each other, however, the range of $S_V$ in the line 2 was shortest (-53.5 ~ -43.4 dB). The average distributional depth was deep in the order of L3 ($32.8{\pm}9.0m$), L1 ($45.2{\pm}9.5m$), L2 ($49.7{\pm}5.6m$). The average altitude was high in the order of L3 ($13.4{\pm}10.3m$), L1 ($17.0{\pm}12.6m$), L2 ($56.7{\pm}5.6m$). The average length, thickness, and area were large in the order of L1, L3, and L2. This means that small sized fish schools were distributed near water surface in the line 2 while relatively large and similar sized fish aggregations between line 1 and line 3 appeared however, fish schools at line 3 had lower distributional depth and smaller compared to those at line 1. Acoustic data were visualized for demonstrating the entire circumstances of survey area. Additionally, there was no correlation between acoustic and trawl results.

• 대한지리학회지
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• 제37권3호
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• pp.237-246
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• 2002

본 연구는 최근 30년 (1971-2000) 최한월 (1월) 평균 기온 및 풍속, 일사량 자료를 토대로 산출한 겨울철 주.야간 바람냉각지수의 분포를 바탕으로 남한의 겨울철 생리 기후지역을 구분하였다. 그 결과. 겨울철 주.야간 바람냉각지수는 기온, 풍속, 일사량 등의 기후요소뿐 아니라 해발고도, 해륙풍, 지형, 해류 등의 기후인자의 영향을 받아 남한은 크게 5개의 생리기후지역으로 세분되었다: 주간 서늘-야간 추움 지역, 주간 쌀쌀-야간 추움 지역, 주간 쌀쌀-야간 매우추움 지역, 주.야간 모두 추움 지역, 주간 추움-야간 극도로 추움 지역, 특히, 남해안을 제외한 해안-도서지역은 계절풍 및 해륙풍의 영향으로 주간에는 싸늘함(Keen), 야간에는 매우 추움(Very Cold)의 체감도를 보였다. 또한, 해발고도가 높은 대관령 지역에서는 기온 감률 및 계절풍의 영향으로 주간에는 추움(Cold), 야간에는 극도로 추움(Extremely Cold)의 체감도를 보였다. 본 연구는 다양하게 나타나는 주야간 바람냉각지수의 분포를 바탕으로 남한의 겨울철 생리기후 지역을 구분함으로써 의복 및 건축 등의 단열에 관한 의사결정시 필요한 기초자료를 제공하고자 하였다.

• Animal Systematics, Evolution and Diversity
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• 제24권2호
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• pp.199-203
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• 2008

Desmotimmia mirabilis (Timm), a rarely known desmoscolecid nematode species, was discovered for the first time from the Yellow Sea off southwestern coast of Korea. This is the third record of the species, and the first report from the northwestern Pacific region. Redescription is prepared on the basis of a male specimen from South Korea.

• 한국제4기학회지
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• 제3권1호
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• pp.1-15
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• 1989

남해 대륙붕에서 채취된 70개의 표층퇴적물과 130개의 해수시료를 대상으로 하여 이 환경에서의 표층퇴적물 분포, 표층퇴적물과 해저지형 및 부유물질 분포에 대하여 연구하였다. 이토(mud)는 남해 대륙붕 수심 약 40m인 연안 및 내대륙붕 해역에서 우세하나 대륙붕 지역의 대부분은 조립물질인 모래가 우세하여 일부 지역에 따라 자갈 또는 패각 모래가 발달한다. 이와 같은 분포경향은 현세 (Holocene)해수면 상승(변동)과 그에 따른 수력학적인 조건에 의한 것으로 해석된다. 현세 간빙기의 최초기 즉, 현세 간빙기 직전의 빙기 (Wisconsin 혹은 Wurm) 후기에 위치하였던 해수면(약 18000y.B.P.)에 관련된 퇴적상과 그 당시의 연안해저지형의 특징이 본 연구결과의 하나로서 규명되었다.

• Ocean and Polar Research
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• 제38권3호
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• pp.171-184
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• 2016

In order to assess the level of contamination and identify the priority contaminants in the Busan coast, intensive sediment sampling was conducted and persistent organic pollutants and heavy metals were analyzed. The Sediment Quality Index (SQI) was derived based on the contaminant data by comparing with Sediment Quality Guidelines (SQGs) established in Korea, Canada, and Australia/New Zealand. Toxic contaminants were found to be widely distributed across the coast. Among organic contaminants, PAHs showed the highest concentration, followed by butyltins, nonylphenols, PBDEs, DDTs, PCBs, HCHs and CHLs. Heavy metals were also abundantly detected with the highest concentration of Zn followed by Cu > Cr > Pb > Ni > As > Cd > Hg. Compared to organic contaminants, most heavy metals, except for Cu and Hg, were homogeneously distributed along the coast in a good relationship with total organic carbon of sediment particles. In general, the concentrations of organic compounds and heavy metals were highest at the inner part of harbor areas with a tendency to decline from inside areas to the outside, indicating the high loading of pollutants from harbors. A high exceedance for low-SQGs and high-SQGs was found for TBT, p'-DDT, p,p'-DDD, Cu and Zn. The SQI scores calculated from low-SQGs and high-SQGs were in the range of 18-100 and 54-100, respectively. The inner part of Busan Harbor, Dadaepo Harbor, and Gamcheon Harbor were observed as being regions of concern. Overall, TBT, Cu, and p,p'-DDT were the chemicals most frequently exceeding SQGs and influencing SQI scores.