• Ocean and Polar Research
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• 제35권1호
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• pp.63-68
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• 2013

The European Common Barnacle Balanus perforatus Brugiere (Crustacea, Cirripedia) has been introduced into the east coast of Korea, presumably via the ballast water of ships. The species has since been spreading along both the northern and southern coast to the east, most likely due to alongshore currents. We predicted the potential range expansion of Balanus perforatus in Korean waters using Genetic Algorithm for Rule-set Prediction (GARP), an environmental niche modeling technique. The results show that much of the southern coastal waters of Korea could be colonized by the spread of the nonindigenous species, but that the west coast is unlikely to be invaded. More sampling on the west coast would enhance the predictability of the model. To our knowledge, this is the first report of its kind for predicting marine nonindigenous species in Korean waters using GARP modeling.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2004년도 추계 학술발표회 제16권2호
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• pp.237-240
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• 2004

When the concrete structures are in contact with seawater, concentration of chloride for estimating chloride diffusion coefficient can be defined as the chloride concentration of sea water. However, in case the concrete structures, constructed in the seashore, aren't directly in contact with seawater, it is difficult to establish the interface concentration of chloride. In addition, marine concrete structures are greatly affected by salt attack such as rebar corrosion, among the cause of salt attack, airborne sea salt is primary factor. Therefore, in this study, salt attack environment by airborne sea salt was investigated in terms of a seasonal distribution at 33 spots, 6 areas in the East, West, South coast for 1 year. Results indicated that in the South coast, the amount of the airborne sea salt is comparatively higher in summer. in the West coast. higher in winter. On the other hand, in the East coast, the amount of the airborne sea salt is rarely affected by a season.

• 산학경영연구
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• 제23권1호
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• pp.107-128
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• 2010

강원동해안은 자연적인 아름다움과 수많은 경승지, 다양한 관광매력물을 보유한 국내 최고의 관광지로서 알려져 왔다. 그중에서도 동해안와 해변은 여름철 가장 즐겨찾는 국민관광지이자 가장 핵심적인 해양관광지로서 오랫동안 확고한 위치를 차지하고 있으며, 타지역에 비해 뛰어난 자연경관미와 청정성 등의 해양관광환경을 자랑하는 곳으로 자리매김 해왔다. 그러나 그동안 강원 동해안 해변은 환경훼손 및 쓰레기 문제, 입장료나 주차료 등 해변운영과 관련된 요금징수 문제, 편의시설의 부족, 알뜰피서 행위나 소비수준의 저하와 같은 소비행태의 문제, 혼잡도 증가로 인한 만족도 저하, 체험프로그램의 미흡, 호객행위나 바가지 요금, 서비스 품질의 문제 등 다양한 문제들이 지속적으로 제기되어 왔다. 최근에는 여름철 저온현상과 같은 기상이변으로 인한 피서객 감소와 지역경제에 대한 부정적 영향이 우려되고 있기도 하다. 따라서 본 연구에서는 이와 같은 쟁점들을 중심으로 강원 동해안의 해변운영과 관련된 주요 현안들에 대해 심도있게 살펴보고 그 개선방안에 대해 제시함으로써 해변운영의 발전방안을 모색하는데 그 의의를 둔다.

• 한국수산과학회지
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• 제51권5호
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• pp.579-589
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• 2018

Data from the two bottom moorings of ADCP (acoustic doppler current profiler), coastal weather station and CTC (conductivity temperature depth) observations for 2001 were analyzed to describe the physical processes associated with upwelling off the southeast coast of Korea. Winds were favorable for upwelling during summer, but were not correlated with currents. Shoaling of isotherms toward the coast due to the baroclinic tilting of the strong East Korean Warm Current (EKWC) provided a favorable background for immediate upwelling-response of surface temperature to southerly winds. This baroclinic effect was supported by a significant inverse coherence between the upper-layer current and bottom temperature near the coast. This upwelling is similar to the Guinea Current upwelling, which is driven by remote forcing (Houghton, 1989). Persistent southward flow was observed below approximately $10^{\circ}C$ isotherm throughout the observation period.

• 환경생물
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• 제32권4호
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• pp.353-362
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• 2014

이번 연구는 한국산 지충이 [Sargassum thunbergii (Mertens ex Roth) Kuntze]의 지리적 형태변이를 확인하고, 형태변이에 따른 품종의 구분에 대하여 분류학적 재검토를 시도하였다. 동해, 서해와 남해안에 분포하는 지충이 개체군의 지리적 형태변이를 조사하기 위해서 개체가 가장 성숙한 시기인 봄철에 채집하였다. 지충이의 관찰대상 형질은 부착기, 줄기의 길이와 직경, 체장, 중심가지의 직경, 마디간격, 측지의 길이와 직경, 잎의 길이와 폭 및 두께, 기낭의 길이와 직경, 기낭 자루와 기낭 돌기의 길이, 생식기탁의 길이와 직경, 질감이었다. 서해안의 지충이는 엽체가 짧고 가늘며, 마디간격이 넓어서 성긴 느낌이고 질감이 부드러워 다른 두 해역의 지충이와는 다른 형태적 특징을 보였다. 동해안의 지충이는 체장이 서해안의 것과 비슷하지만 중심가지와 측지가 굵어서 질감이 거칠고, 측지가 없거나 매우 짧은 것도 있으며, 잎과 기낭이 다른 해역에 비해 컸다. 남해안의 지충이는 체장과 측지가 가장 길고 잎과 기낭이 짧은 것이 특징이었다. 동해안 북부에서 채집된 개체들은 f. latifolium과 형질이 유사하였다. 그러나 다른 해역에서는 네 품종의 원기재와 정확히 일치하지 않아 품종을 구분하는 식별형질은 한국산 지충이의 형태 변이에 적용할 수 없었다. 따라서 생육지에 따라 나타나는 지충이의 다양한 형태변이는 종 이하의 분류군으로 나누는 것보다는 생육지 환경조건에 따른 변이체로 보는 것이 타당할 것으로 사료된다.

• 대한지리학회지
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• 제3권
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• pp.1-16
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• 1968

이 글에서는 다음의 내용을 다루었다. 1. 퇴적물분석과 그의 고찰, (1) 사층 및 역층의 퇴적물, (2) 기타퇴적물 2. 기반암면 고찰

• 해양환경안전학회지
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• 제29권3호
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• pp.255-269
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• 2023

Surface water temperature of a bay (from the south to the north) increases in spring and summer, but decreases in autumn and winter. Due to shallow water depth, freshwater outflow, and weak current, the water temperature in the central to northern part of the bay is greatly affected by the land coast and air temperature, with large fluctuations. Water temperature variations are large in the north-east coast of the bay, but small in the south-west coast. The difference between water temperature and air temperature is greater in winter and in the south-central part of the bay than that in the north to the eastern coast of the bay where sea dykes are located. As the bay goes from south to north, the range of water temperature fluctuation and the phase show increases. When fresh water is released from the sea dike, the surrounding water temperature decreases and then rises, or rises and then falls. The first mode of empirical orthogonal function (EOF) represents seasonal variation of water temperature. The second mode represents the variability of water temperature gradient in east-west and north-south directions of the bay. In the first mode, the maximum and the minimum are shown in autumn and summer, respectively, consistent with seasonal distribution of surface water temperature variance. In the second mode, phases of the coast of Seosan~Boryeong and the east coast of Anmyeon Island are opposite to each other, bordering the center of the deep bay. Periodic fluctuation of the first mode time coefficient dominates in the one-day and half-day cycle. Its daily fluctuation pattern is similar to air temperature variation. Sea conditions and topographical characteristics excluding air temperature are factors contributing to the variation of the second mode time coefficient.

• 대기
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• 제26권2호
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• pp.227-241
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• 2016

This study investigated the cause of the heavy snowfall that occurred in the East Coast of Korea from 6 February to 14 February 2014. The synoptic conditions were analyzed using blocking index, equivalent potential temperature, potential vorticity, maritime temperature difference, temperature advection, and ground convergence. During the case period, a large blocking pattern developed over the Western Pacific causing the flow to be stagnant, and there was a North-South oriented High-to-Low pressure system over the Korean Peninsula because of this arrangement. The case period was divided into three parts based on the synoptic forcing that was responsible for the heavy snowfall; detailed analyses were conducted for the first and last period. In the first period, a heavy snowfall occurred over the entire Korean Peninsula due to strong updrafts from baroclinic instability and a low pressure caused by potential vorticity located at the mid-troposphere. In the lower atmosphere, a North-South oriented High-to-Low pressure system over the Eastern Korea intensified the easterly airflow and created a convergence zone near the ground which strengthened the upslope effect of the Taebaek Mountain range with a cumulative fresh snowfall amount of 41 cm in the East Coast region. In the last period, the cold air nestled in the Maritime Province of Siberia and Manchuria strengthened much more than that in the first half and extended to the East Sea. The temperature difference between the 850 hPa air and the SST was large and convective clouds developed over the sea. The highest cumulative fresh snow amount of 39.7 cm was recorded in the coastal area during this period. During the entire period, vertically oriented equivalent potential temperature showed neutral stability layer that helped the cloud formation and development in the East Coast. The 2014 heavy snowfall case over the East Coast provinces of Korea were due to: 1) stagnation of the system by blocking pattern, 2) the dynamic effect of mid-level potential vorticity of 1.6 PVU, 3) the easterly air flow from North-South oriented High-to-Low pressure system, 4) the existence of vertically oriented neutral stable layer, and 5) the expansion of strong cold air into the East Sea which created a large temperature difference between the air and the ocean.

• Journal of Plant Biology
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• 제23권2호
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• pp.55-60
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• 1980

The quantity of heavy metals (As, Cd, Cu, Pb, Zn) contained in marine algae collected in Onsan-myon on the east coast of Korea from March to December 1978 was determined as a part of the environmental base line survey of the Onsan Industrial Base. In general, green algae have a higher Cu content than either brown or red algae, and brown algae have higher As and lower Cu contents, while red algae have a higher Zn content. Significant differences between algal species in either Cd or Pb content were however not found.

• Journal of Plant Biology
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• 제3권2호
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• pp.26-28
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• 1960

Electron-Microscopical Observalion on Fine Structure of Diatom Frustules which is collected in the East Coast of Kyung-Pook Province. Kor. Jour. Bot. 3(2) 26-28 lllus. 1960 The fine structure of Diatom frustules which is collected in the east coast of Yungil and Wul Sung, Kyung-Pook Province, is ovserved by the light microscope and hte electron-microscope, and the materials collected by auther are 1 family, 2 genus and 2 species. Coscinodiscus elegans. Greville Actinoptychus undulatus Rals Those were havitated in sea water as the plankton which were found in diatomite.