• 환경생물
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• 제34권4호
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• pp.329-345
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• 2016

해남반도와 신안 및 진도 사이에 위치한 시아해에서 저서동물 주요 우점종, 군집 구조 및 분포 특성을 파악하고자 49개 정점을 설정하고 2001년 11월, 2002년 2월, 5월, 8월에 van Veen grab(채집 면적 $0.1m^2$)을 사용하여 각 정점당 2회씩 저서동물을 채집하였다. 퇴적상은 목포구와 인접한 내측해역은 muddy sandy gravel 퇴적상이, 조류가 강한 명랑수도와 인접한 지역은 gravel의 퇴적상이, 우이도 남측 해역에서는 sand muddy의 퇴적상이었다. 퇴적물내의 유기물 함량은 0.5~1.5%의 범위로서 평균 약 0.6%였다. 전 조사기간 동안 총 271종의 저서동물이 출현하였으며 다모류가 전체의 34%를 점유하여 가장 우점하였으며, 갑각류가 28%, 연체동물이 21%를 점유하였다. 평균 밀도는 $166ind.\;m^{-2}$였으며, 다모류가 약 40%, 갑각류가 26%를 차지하였다. 생체량은 평균 $29.2g\;m^{-2}$로서 연체동물이 44%였다. 입도가 세립한 신안군 압해도에서 입도가 조립한 진도군 외측 해역으로 갈수록 출현 종 수, 밀도 및 생체량이 감소하는 경향을 나타내었으며 Bio-env 분석 결과 군집은 입도 조성과 유기물 함량에 따라 영향을 받는 것으로 나타났다. 주요 우점종으로는 세립질 퇴적상에서는 Photis longicaudata, Septifer keenae, Maldane cristata, Lumbrineris longifolia, Heteromastus filiformis, Coptothyris grayi 등이었다. 집괴 분석 결과 4개의 정점군으로 구분되었으며 SIMPER 분석 결과 정점군 A에서는 Striarca symmetrica, 정점군 B에서는 Glycera chirori, 정점군 C에서는 Heteromastus filiformis, 정점군 D에서는 Latreutes planirostris가 유사도에 영향을 미쳤다. 이 연구결과로부터 시아해의 대형 저서동물 군집은 퇴적상과 이에 수반된 유기물 함량에 따라 영향을 받는 양호한 군집 특성을 보였다.

• 한국해양학회지
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• 제9권1_2호
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• pp.10-18
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• 1974

The cold water mass around the southeast coast of the Korean Peninsula is analyzed by using CSK data from 1966 through 1970. It is shown that this water mass flows down from the region offshore of Jukbyun to the area of Youngil Bay along the 100meter contour line of bottom topography. In ordinary summer conditions when the current velocity in the Korea Strait is usually above about 50cm/sec and the wind direction is southwest, the cold water ascends to the surface and makes the surface temperature gradient large, unless disturbed by a tropical cyclon. The bottom water of the Korea Strait is formed by the stratification after the Tsushima intermediate water and the Japan Sea intermediate water have been mixed. In winter the Tsushima intermediate water with high salinity sinks rapidly around the inlet of the Japan Sea and prevents the Japan Sea intemediate water from entering the Korea Strait.

• 수산해양교육연구
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• 제24권2호
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• pp.333-345
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• 2012

NOAA/AVHRR, Topex/Poseidon, and Jason-1 data were used to analyze sea surface temperatures and thermal fronts in the North East Asia Seas. Temporal and spatial analyses were based on data from 1993 to 2008. The amplitude and phase for the annual mode on SL and SST were investigated with harmonic analysis. The geographical distribution of amplitudes for comparison of SL and SST are slightly reverse in southwest-northeast tilted direction. The time series analysis conducted on the entire researched area presented consistent pattern. Peak of Sea Level was presented 1~2 months after the peak of the surface sea temperature was shown. This explains that Sea Level change occurs after the generation of surface sea temperature change in sea. The Sobel edge detection method delineated four fronts. Thermal fronts generally occurred over steep bathymetric slopes. Annual amplitudes and phases were bounded within these frontal areas.

• 풍력에너지저널
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• 제15권1호
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• pp.21-29
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• 2024

In order to respond to environmental changes and various events in the nearby sea area due to the operation of an offshore wind substantiation farm in the Southwest Sea, X-band radar has been installed and operated on a fixed platform since 2018. The X-band radar's monitoring system produces wave and current data through Rutter's Ocean WaveS wave and current (Sigma S6 WaMoS II). In this study, to verify the reliability of the produced data, the accuracy of current and wave data was evaluated by analyzing the correlation with the results obtained by an acoustic doppler current profiler (ADCP). The selected analysis period was a total of 30 days from November 29 to December 28, 2021, the period during which the ADCP survey was conducted. As a result of comparative verification, the current, wave height and peak wave period (H_s > 0.69 m) data observed from the X-band radar showed a high correlation with the results investigated from ADCP. In the future, current and wave data produced by X-band radar are expected to be used as basic data to analyze environmental changes in sea areas and provide information on various events.

• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2017년도 추계학술발표회
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• pp.245-245
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• 2017

• 한국수산과학회지
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• 제44권6호
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• pp.612-621
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• 2011

The influences of inland pollution sources because of rainfall events on the bacteriological water quality in Geoje Bay, a major shellfish production area in Korea, were investigated. The sanitary status of sea water and shellfish after rainfall events was also evaluated. The flow rates of 13 streams around Geoje Bay showed 6 to 7-fold increases after 15 to 21 mm of rainfall. Peak pollution was observed in the Naegan Stream, the Gandeok Stream and the Seojeong Stream. The calculated impact area of inland pollution sources was 3.1 $km^2$ immediately after 15 mm of rainfall and expanded to 3.5 $km^2$ after 24 hours. These calculations of impacted area matched results from fecal coliform analyses with sea water. The distance between the major pollution source in the bay (the Gandeok Stream) and the station with the worst bacteriological water quality immediately after 15 mm of rainfall, which was below the Korean standard, was 0.8 km in a straight line; this distance increased to 2.0 km after a period of 24 hours. The area impacted by inland pollution sources after a 15 mm rainfall event was wider than after a 21 mm rainfall. Although the flow rate from inland pollution sources was higher, the concentration of fecal coliform in the discharged water was lower after higher rainfall events. These observations corresponded with the results of fecal coliform analyses with sea water samples. According to the evaluation of the influences of inland pollution sources and fecal coliform analyses on sea water and shellfish samples in Geoje Bay, pollutants from inland sources did not reach the boundary line of the shellfish growing area after rainfall events of 15 or 22 mm. The bacteriological water quality of the shellfish growing area in Geoje Bay met the Korean standard and US NSSP requirements for approved shellfish growing areas.

• 대한지리학회지
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• 제41권4호
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• pp.457-469
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• 2006

본 연구에서는 호남 지방의 15개 기상 관측소의 일강설량을 분석하여 강설의 분포 특성과 지역별 강설 분포 차이의 원인을 파악하고자 하였다. 호남 지방의 강설 분포와 강설 발생 패턴은 지역별로 다양하다. 강설의 발생 패턴에 따라 호남 지방의 강설 지역을 내륙 북부 다설 지역(전주, 임실, 남원), 내륙 남부 다설 지역(광주. 순천), 산간 다설 지역(장수), 남해안 과설 지역(고흥, 여수), 서해안 다설 지역(군산, 부안, 정읍), 남서해안 다설 지역(목포, 해남), 남서해안 소설 지역(장흥, 완도)으로 구분할 수 있다. 서해안 다설 지역과 남서해안 다설 지역은 시베리아 고기압 확장 시 해양의 영향으로 강설이 발생한다. 반면 내륙 북부 다설 지역과 내륙 남부다설 지역은 시베리아 고기압의 세력이 강하여 그 영향력이 내륙까지 미쳤을 때 강설이 발생한다. 이때 내륙 북부 다설 지역의 남원, 임실 등은 노령산맥 줄기의 북사면에 위치하여 지형에 의한 공기의 강제 상승으로 인하여 강설이 많다. 산간 다설 지역은 해발 고도가 가장 높은 산지 지역으로 지형성 강설이 발생하며, 남해안 과설 지역은 주로 남해안에 저기압이 통과할 경우 강설이 발생하나 그 빈도가 매우 낮다. 남서해안 소설 지역은 남서해안 다설 지역에 비해 서해로부터 떨어져 있어 시베리아 고기압에 의한 강설이 상대적으로 적다.

• Ocean and Polar Research
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• 제31권2호
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• pp.177-187
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• 2009

This study examined the multi-scale variabilities of sea surface temperature (SST) and salinity in the Japan/East Sea (JES) based on statistical analyses of observational data, with a focus on the northwestern part of the sea. The regionality of JES SST variability was estimated for different frequency ranges on semimonthly (11-17 days), monthly to seasonal (30-90 days), quasi-semiannual (157-220 days), and quasi-biennial (1.5-3 years) time scales using cluster analyses of daily gridded SST data for 1996 to 2007 from the Japan Meteorological Agency (JMA). Several significant peaks and regional cores were found in each frequency range of the SST anomaly (SSTA) oscillations. Quasi-semiannual SSTA oscillations with high amplitude were found in the south-southwestern part of the Japan Basin ($41-43^{\circ}N$) and were amplified in the area adjacent to Peter the Great Bay. Oscillations with periods of 79 and 55 days also prevailed over the southwest Japan Basin between the Yamato Rise and the continental slope. A similar method was applied to classify SST and the annual cycle of surface salinity using Generalized Digital Environmental Model (GDEM) gridded data. The Tatarskii Strait and adjacent area showed the most specific annual cycles and variability in salinity on interannual to interdecadal time scales. The most significant inverse relationship between surface salinity in the Tatarskii Strait and southern JES areas was found on the interdecadal time scale. Linkages of sea water salinity in the Tatarskii Strait with Amur River discharge and wind velocity over Amurskii Liman were also revealed.

• 한국수산과학회지
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• 제32권5호
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• pp.618-623
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• 1999

표층 수온전선과 어장형성과의 관계를 규명하기 위하여 1991년부터 1996년까지 한국선망 41개 선단의 어획자료와 인공위성에 의해 관측된 표층수온자료로부터 구한 표층수온전선과의 관계를 분석 정리한 결과를 요약하면 다음과 같다. 남해 및 동중국해 북부 해역의 선망어장은 주년 전선대 및 그 주변 대마 난류수 연변부에서 좋은 어장이 형성되고 있지만 전선역어장 외에 동계에는 제주도 서쪽 해역의 Water pocket내의 난류역어장, 제주도와 고도열도 사이 등고수온선이 심한 굴곡부내의 대마난류 주류역 어장, 동$\cdot$춘계 대마도 주변의 지형성 와류어장등으로 대별되고 한국 남서부 해역에도 하$\cdot$추계에 연안 전선대 외측과 황해저층냉수 사이의 황해난류역에 좋은 어장이 형성된다.

• 한국수산과학회지
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• 제47권5호
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• pp.501-507
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• 2014

Norovirus (NoV) is a major cause of food poisoning outbreaks in Korea. Most NoV outbreaks originate from environmental contamination, but bivalves such as oysters are also important vectors. Oyster Crassostrea gigas contamination by NoV has been reported in Korea, but no quantitative analyses of NoV have been performed. We investigated the NoV concentration in 21 oyster samples from a Korean commercial oyster-growing area with confirmed fecal contamination from January to December 2012, using real-time reverse transcription-polymerase chain reaction. Additionally, we assessed the NoV concentration after heating to investigate the effects of heat treatment on NoV-infected oysters. In NoV-positive samples, the cycle threshold (Ct) values were 37.43-39.41 and 36.77-39.30, while viral concentrations were $8.97{\times}10^2-2.24{\times}10^2$ and $3.05{\times}10^2-7.47{\times}10^1$ copies/g for genogroups I and II, respectively. After heat treatment, NoV genogroup I decreased by 83.4%, 88.0%, 89.4% and 100% at $60^{\circ}C$, $68^{\circ}C$, $70^{\circ}C$, and $100^{\circ}C$, respectively, for 15 min, while genogroup II respectively decreased by 67.3%, 76.3%, 80.1%, and 89.8% under the same conditions.