• 수산해양교육연구
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• 제17권2호
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• pp.209-217
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• 2005

The energy balance of the surface layer of the water (the Yellow Sea, the East China Sea and the East Sea) was examined using satellite data. Variations of the net heat flux were similar to those of the latent heat flux which was more intensive than the sensible heat flux. The sensible heat flux was affected the difference between the sea surface temperature and the air temperature and was less important over the Yellow Sea. The maximum of the latent heat flux occurred in autumn when the air is drier and the wind is stronger. The shortwave radiation flux decreased with the latitude and depended on the cloudiness as the longwave radiation flux does. Annual variations of heat fluxes show that the latent heat flux was more intensive over the East China Sea than the East Sea and the Yellow Sea, while the spatial differences of the other heat fluxes were weak.

• 한국수산과학회지
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• 제43권1호
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• pp.18-24
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• 2010

The biochemical composition of wild and cultured yellow croaker, Larimichthys polyactis, was analyzed in this study. The moisture contents in wild and cultured yellow croaker was high: $75.2{\pm}1.60%$ and $79.5{\pm}1.95%$, respectively. The crude lipid contents of wild and cultured yellow croaker were low; moreover, the crude protein and ash contents did nol differ significantly (P>0.05). The total amino acid content of wild and cultured yellow croaker did not differ significantly; however, the cystine content of wild yellow croaker was higher than than of cultured yellow croaker. The essential /nonessential amino acid (E/NE) ratio in wild and cultured yellow croaker was $0.76{\pm}0.01$ and $0.77{\pm}0.02$, respectively. The free amino acid and extractive nitrogen contents of cultured yellow croaker were high and differed significantly. The water soluble vitamin ($B_1$, $B_2$, $B_6$, $B_{12}$, C and folate) and fat-soluble vitamin (A and E) contents did not differ significantly. expect for niacin. The niacin content of cultured yellow croaker was higher than that of wild yellow croaker. The fatty acid composition of wild and cultured yellow croaker did not differ significantly The sodium, magnesium, and copper contents in wild yellow croaker were relatively low. In comparison, the calcium, phosphorus and iron contents in cultured yellow croaker were relatively high. Overall, the biochemical composition of wild and cultured yellow croaker did not differ significantly.

• 한국해양학회지:바다
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• 제23권4호
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• pp.179-191
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• 2018

황해 동부해역 표층퇴적물의 중금속 분포 특성을 파악하기 위하여 입도, 유기탄소(TOC)와 함께 중금속 원소들(Cu, Pb, Zn, Cd, Cr, Mn, As, Ni, Co, Li, Fe, Al)의 농도를 분석하였다. 연구결과에 따르면, 일부 정점에서 Pb, Mn, As를 제외하면 모든 중금속 농도의 분포는 입도 및 TOC의 분포와 유사하게 황해 중앙해역에서 상대적으로 높고, 한국 연안으로 갈수록 감소하는 경향을 보였다. 입도와 중금속 농도간의 관계를 통하여 대부분의 금속은 입도가 세립할수록 농도가 높게 나타나는 일반적인 경향을 보였다. 그러나 일부 정점에서 Pb은 조립질 퇴적물에서의 암석기원(feldspar) 영향, Mn은 생물기원($CaCO_3$) 영향, As는 중광물(pyrite) 특성에 따라 분포 양상이 다르게 나타났다. 과거에 조사한 자료(2000년)와 비교했을 때, 황해 동부해역에서 지난 15년 동안의 추가적인 중금속 농축은 없었고, 투기해역에 대한 저질환경은 과거에 비해 크게 개선되지 못한 것으로 나타났다. 연구해역 내 모든 중금속의 농도는 한국과 중국에서 규정하고 있는 최소기준(TEL, MSQ-1)보다 낮았지만, 농축지수(enrichment factor; EF), 농집지수(geo-accumulation index; $I_{geo}$), 생태위해성지수(ecological risk index; ERI)는 Cu, Pb, Zn, Cr이 황해 중앙해역에서 상대적으로 높게 나타났다.

• 자원환경지질
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• 제53권5호
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• pp.505-515
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• 2020

황해와 동중국해 북부에는 해퇴에 의한 사질 퇴적체가 분포한다. 이러한 사질 퇴적체들은 지구물리 탐사와 코어를 이용한 다양한 연구들이 수행되었지만, 광물학적 연구는 거의 수행되지 않았다. 이번 연구에서는 황해와 동중국해 북부지역의 중광물 특성을 파악하고, 광물화학적 분석을 통해 조립질 퇴적물의 기원지와 퇴적환경을 알아보고자 하였다. 연구지역에서는 8종의 중광물(녹염석, 각섬석, 석류석, 저어콘, 스핀, 금홍석, 인회석, 모나자이트)이 확인되었으며, 중광물의 분포와 퇴적물의 특성을 기반으로 6개의 지역(area A-F)으로 구분되었다. 연구지역의 각섬석은 칼슘 각섬석군의 에데나이트와 보통각섬석으로 분류되었으며, 석류석은 주로 파이랄스파이트군의 알만딘으로 확인되었다. 중광물 조성과 광물화학 결과는 구분된 6개의 지역에서 뚜렷한 차이를 보였으며, 기원지와 퇴적환경을 결정하는데 이용되었다. 황해 동부의 area A와 B는 한반도 기원의 퇴적물로 판단되며, 두 지역은 조류와 연안류에 의해 서로 다른 중광물 특성을 나타낸다. 또한, 모나자이트는 area B에서만 발견되며, 한반도 서남부 기원지의 지시자로 이용될 수 있다. 황해 서부의 area D와 E는 황하 기원 퇴적물의 특성을 보이며, area E는 양쯔강 퇴적물로 구성된다. 동중국해 북부의 area C는 양쯔강 기원의 중광물 특성을 보이며, 해수면 상승과 함께 고하구의 해퇴에 의해 형성되었다. 또한, 풍부한 인회석은 area C의 퇴적 시기가 최후빙기극대기와 가까움을 나타낸다.

• ALGAE
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• 제34권4호
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• pp.315-326
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• 2019

Northeastward drifts of massive Sargassum patches were observed in the East China Sea (ECS) and Yellow Sea (YS) by the Geostationary Ocean Color Imager (GOCI) in May 2017. Coverage of the brown macroalgae patches was the largest ever recorded in the ECS and YS. Three-dimensional circulation modeling and Lagrangian particle tracking simulations were conducted to reproduce drifting trajectories of the macroalgae patches. The trajectories of the macroalgae patches were controlled by winds as well as surface currents. A windage (leeway) factor of 1% was chosen based on sensitivity simulations. Southerly winds in May 2017 contributed to farther northward intrusion of the brown macroalgae into the YS. Although satellite observation and numerical modeling have their own limitations and associated uncertainties, the two methods can be combined to find the best estimate of Sargassum patch trajectories. When satellites were unable to capture all patches because of clouds and sea fog in the ECS and YS, the Lagrangian particle tracking model helped to track and restore the missing patches in satellite images. This study suggests that satellite monitoring and numerical modeling are complementary to ensure accurate tracking of macroalgae patches in the ECS and YS.

• Ocean Science Journal
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• 제43권2호
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• pp.115-126
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• 2008

Direct measurements of four radiative components at air-sea boundary layer were conducted in the southern Yellow Sea during three cruises (seasons) in 2007. Simultaneous observations of meteorological (cloud cover, air temperature and humidity) and oceanographic (sea surface temperature) parameters were carried out. Observational results of radiative fluxes and meteorological and oceanographic parameters are presented. Mean diurnal cycles of four radiative components, net radiation, and sea surface albedo are calculated to achieve averages in different seasons. Net radiative fluxes in three seasons (winter, spring, autumn) are 8, 146, $60\;W/m^2$, respectively. Comparisons between the observed radiative fluxes and those estimated with formulas are taken.

• 대한조선학회논문집
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• 제38권1호
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• pp.27-36
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• 2001

현재, 유럽에서 중요한 역할을 담당하고 있는 수송모델로서 바다와 강을 연계한 Sea-river 수송모델은 황해권 지역에서의 국내 외 화물수송과 여객수송에 있어 장래에 매우 중요한 역할을 할 것이다. 본 연구에서는 육상수송에 따른 국내 교통 혼잡문제와 극동아시아 국가의 화물량 증대로 인한 물류 문제의 개선을 위해 경인운하의 운항조건에 적합한 sea-river 연계 바아지선단의 수송모델을 제안한다. 즉, 본 연구에서는 경인운하의 형상과 크기 등의 제한조건 등을 고려하여 바아지선단의 수송효율 측면의 경제성을 바탕으로 경인운하를 이용한 황해권의 sea-river 연계 수송모델로서 효율적인 바아지선단 구성의 표준화를 제시하고자 한다.

• 한국수산과학회지
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• 제42권6호
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• pp.725-728
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• 2009

Four specimens of Cynoglossus larvae (3.2-7.3 mm in notochord length, NL) collected from the middle Yellow Sea in August, 2008 were identified as Cynoglossus joyneri larvae based on morphological characteristics; (1) the two elongated dorsal fin rays on the parietal region, (2) protruded abdomen, (3) no melanophores on the mediolateral trunk and tail. Larva of 3.2 mm NL is compressed with a little big head and tapering, long tail. Larva of 7.0 mm NL has 115 dorsal fin and 85 anal fin rays, which are the same to those of adult. Larva of 7.3 mm NL tended to have concave part in the fringe of forehead, in which left-side eye may move to the other side.

• 한국수산과학회지
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• 제29권6호
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• pp.862-875
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• 1996

The CTD data observed in the sea northwest of Cheju Island have been analyzed to figure out the seasonal circulation around Cheju Island. Warm and saline waters flow into the Yellow Sea through the middle region of the Yellow Sea in winter and along the west coast of Korean Peninsula in summer. On the other hand, cold and less saline waters flow out of the Yellow Sea through the middle region in summer and along the west coast of Korean Peninsula in winter. These flows make the seasonal circulation around Cheju Island. As dynamics, the monsoon wind and the variation of Kuroshio transport have been suggested. Comparing the observational result, the circulation driven by the variation of Kuroshio transport is strengthened by monsoon winds in the numerical model.

• 수산해양기술연구
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• 제12권2호
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• pp.37-42
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• 1976

Each term of heat badget equation in the eastern Yellow Sea was calculated and the variation in relation to meteorological condition was shown for the period from September 1973 to February 1974, At Mal-do near Gunsan the maximum heat exchange occurred at the last ten days of December (--522 1y/day), while at Sunmi-do near Incheon it occurred at the middle ten days of November (--665 1y /day), The contribution of the sensible heat to total heat exchange increased rapidly, while the effect of cloudiness decreased to be negligible in winter. The values of the heat exchange fluctuated considerably with the periodic occurrence of the cold Siberiaa air mass. The mean evaporation heat estimated indirectly from the aerological data was 32 ly/day at the northern part and 269 ly/dlY at the southern part of the Yellow Sea in December 1973.