• 한국해양학회지
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• 제12권2호
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• pp.57-66
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• 1977

무기물에서 유기물을 생산하는 곳으로서 뿐만 아니라 인류의 마지막 식량공급처로서의 해양에 대한 기초생산의 중요성이 날로 높아져 국제인도양조사때나 Kuroshio해역조사때 생산력이 측정되었고 북서태평양(Sorokin and Koblentz-Miskke; 1958, Ichimura and Saijo; 1959, Saijo and Ichimura; 1960, Aruga and Monsi; 1962, 천촌;1963), 인도네시아 주변해역(Doty et al;1963)등에서도 기초생산이 측정된 바 있다. 일본의 주요 9개만에서는 월별측정(송평 등;1964)이 되었다. 우리 나라 연안에서는 최와 정(1966)이 $C^{14}$를 이용하여 광합성량을 측청하였고 Kang(1967) 은 수영만에서 계절별로 산소소모에 의한 광합성량을 측정했다.다.

• Animal Systematics, Evolution and Diversity
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• 제16권1호
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• pp.39-53
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• 2000

1994년 7월부터 1999년 6월까지 대한해협의 당사 및 인근수역에서 본인과 연구팀에 의해 조간대와 잠수 및 SCUBA 잠수등으로 수행되었다. 채집된 재료는 8과 17속 30종으로 동정 분류 되었고, 이 중 한 종, 주머니가죽멍게(Molgula hozawai)은 한국미기록 종이었으며, 그 외 29종은 당사 및 인근 수역에서는 처음으로 밝혀지는 종들이다. 이 지역 해초류의 생물지리학적 분포를 보면 30종 모두가 우리나라 천해종이며 난수역 종이다. 이들 중 23종은 거제도에서 이미 보고된 종이고, 12종은 춘도에서 보고되었으며, 6종 일로툼멍게(Eudistoma illotum), 새공멍게(Symplegma connec-tans), 가로줄멍게(Boltenia transversaria), 우주멍게(Microcosmus multitentacluatus), 네모가죽멍게(Pyura squamata)와 주머니가죽빛멍게(Molgula hozawai)는 이들 3개 난수역 지역에서는 처음으로 보고된 종이다. 그리고 11종(37%)은 3개 지역에 공통으로 나타났고 12종(40%)은 당사와 거제도에 공통이며, 한종(3%), 두줄미더덕(Styela canopus)은 당사와 춘도에서 공통종으로 나타났다. 따라서 당사 및 인근 수역의 해초류는 거제도와 춘도의 해초류상과 아주 유사하며 이는 이들 지역이 거의 같은 위도(북위 34$^{\circ}$ 40'- 35$^{\circ}$ 22', 동위 128$^{\circ}$ 45' - 129$^{\circ}$ 27')에 위치하고 있어 북상하는 따뜻한 쿠로시오 난류의 영향을 받기 때문으로 사료된다.

• Ocean and Polar Research
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• 제32권1호
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• pp.1-13
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• 2010

To assess short-term variation of summer phytoplankton community structure in different water masses, phytoplankton and environmental factors were monitored from 31 stations on and off the southern coasts of Korea, from June 18 to June 20 2009. According to multidimensional scaling (MDS) and cluster analysis based on phytoplankton community data from each station, the southern sea was divided into two groups. The first group included stations in the south-eastern region of Jeju Island, which is strongly influenced by the Kuroshio warm current. The second group located along the coastal region of the southern sea, which was mainly comprised of Bacillariophyceae and Crytophyceae. Of these stations, St. 13 and 28 formed a temperature front caused by different hydrological conditions. In particular, nutrients and Chl.a concentrations in these two stations were significantly higher compared to those in the other stations. This indicates that phytoplankton population and subsequent microalgal growth under high nutrient concentrations vary in different water masses. Our results support the theory that phytoplankton community structure in the southern sea of Korea can be influenced on a short-term scale by different water masses and currents.

• Ocean and Polar Research
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• 제23권4호
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• pp.361-376
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• 2001

The characteristics of SST variability in the East Sea are analyzed using NOAA/AVHRR weekly SST data with about $0.18^{\circ}{\times}0.18^{\circ}$ resolution ($1981{\sim}2000$) and reconstructed historical monthly SST data with $2^{\circ}{\times}2^{\circ}$ resolution $(1950{\sim}1998)$. The distinct feature of wintertime SST is high variability in the western and eastern parts of $38^{\circ}{\sim}40^{\circ}$ latitudinal band, which are the northern boundary of warm current in the East Sea during winter. However, summertime SST exhibits variability with similar magnitude in the entire region of the East Sea. The analysis of remote correlation also shows that SST in the East Sea is closely correlated with that in the region of Kuroshio in winter, but in summer is related with that in the western and eastern regions of the same latitudes. From these results it is postulated that the SST variability in the East Sea may be related with the variations of East Korean Warm Current and Tsushima Warm Current in winter, but in summer probably with the variations of atmospheric components. In the analysis of ENSO related SST anomaly, a significant negative correlation between SST anomalies in the East Sea and SST anomalies in the tropical Pacific is found in the months of August-October (ASO). The SST in the ASO period shows more significant cooling in E1 $Ni\~{n}o$ events than warming in La $Ni\~{n}a$ events. Also, the regional analysis shows by the Student's t-test that the negative SST anomalies in the E1 $Ni\~{n}o$ events are more significant in the southwestern part of the East Sea.

• Ocean and Polar Research
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• 제30권3호
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• pp.289-301
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• 2008

Community structure of heterotrophic protists and their grazing impact on phytoplankton were studied in Northwest Pacific Ocean during October, 2007. The study area was divided into four regions based on physical properties (temperature and salinity) and chlorophyll-a distribution. They were Region I of North Equatorial Currents, Region II of Kuroshio waters, Region III of shelf mixed water, and Region IV of Tsushima warm current from East China Sea. The distribution of chlorophyll-a concentrations and community structure of heterotrophic protists were significantly affected by physical properties of the water column. The lowest concentration of chlorophyll-a was identified in Region I and II, where pico-sized chlorophyll-a was most dominant (>80% of total chlorophyll-a). Biomass of heterotrophic protists was also low in Region I and II. However, Region III was characterized by low salinity and temperature and high chlorophyll-a concentration, with relatively lower pico-sized chlorophyll-a dominance. The Highest biomass of heterotrophic protists appeared in Region III, along with the relatively less important nanoprotists. In Region I, II and IV, heterotrophic dinoflagellates were dominant among the protists, while ciliates were dominant in Region III. Community structure varied with physical(salinity and temperature) and biological (chlorophyll-a) properties. Biomass of heterotrophic protists correlated well with chlorophyll-a concentration in the study area ($r^2=0.66$, p<0.0001). The potential effect of grazing activity on phytoplankton is relatively high in Region I and II. Our result suggest that biomass and size structure of heterotrophic protists might be significantly influenced by phytoplankton size and concentration.

• 한국수산과학회지
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• 제26권6호
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• pp.580-593
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• 1993

대마해류는 큐슈 서쪽해역에서 갈라져 대한해협으로 북상하여 흐르는 것으로 알려져 왔다. 이럴 경우 해류는 등수심선을 가로질러야 하며 이를 위해 어떤 힘이 필요하다. 그러한 힘으로는, 대한해협과 쯔가루해협 사이의 해수면의 차이, Reynolds Stress, 밀도차이 등에 제시되어져 왔다. 이 논문에서는 순압인 경우에 이들의 역할을 수치모델을 사용하여 연구해 보았다. 모델 결과는 대마해류가 위의 어떠한 힘이 없이도 발생한다는 것을 보였다. 해류는 동중국해에서 등수심선을 따라 흐르며, 해류흐름은 외부의 힘에 의해서가 아니라 자신의 역학에 의해 발생하는 것으로 보인다. 그 역학은 육지에 의한 틈새(gap) 사이로 유출되는 흐름에서와 같다. 모델결과는 또한 이 해역의 해류가 Reynolds Stress와 같은 외부의 힘에 의해 영향을 받을 수 있다는 것을 보여 주며, 그럴 경우 실제 해양에서는 해류의 역학과 형태가 복잡하게 나타날 가능성이 있다. 그러나 순압모델 결과는 대마해류가 기본적으로는 지형균형(geostrophic adjustment)에 의한 것임을 보여준다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2004년도 Proceedings of ISRS 2004
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• pp.192-195
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• 2004

Products of gridded surface wind and windstress vectors over the world ocean have been constructed by satellite scatterometer data with highly temporal and spatial resolutions. Even if the ADEOS-II/SeaWinds has supplied surface wind data only for short duration in Apr. to Oct. 2003 to us, it permits us to construct a product with higher resolution together with the Qscat/SeaWinds. In addition to our basic product with its resolution of $1^{\circ}\times1^{\circ}$ in space and daily in time, we try to construct products with $1/2^{\circ}\times1/2^{\circ}$ and semi- and quarter-daily resolution. These products are validated by inter-comparison with in-situ data (TAO and NDBC buoys), and also compared with numerical weather prediction(NWP) ones (NCEP reanalysis). Result reveals that our product has higher reliability in the study area than the NCEP's. For the open ocean regions in the middle and high latitudes where there are no in-situ data, we find that there are clear differences between them. Especially in the southern westerly region of 400-600S, the' wind-stress magnitudes by the NCEP are significantly larger than the others, suggesting that they are overestimated. We also calculate wind-stress curl field that is an important factor for ocean dynamics and focus its spatial character in the northwestern Pacific around Japan. Positive curl areas are found to cover from southwest to northeast in our focus region and almost correspond to the Kuroshio path. It is suggested that the vorticity field in the lower atmosphere is related to the upper oceanic one, and thus an aspect of air-sea interaction process.

• 한국수산과학회지
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• 제50권2호
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• pp.183-194
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• 2017

The catch of Todarodes pacificus in the Yellow Sea is commonly known as the winter cohort. So, to understand the transport process of winter cohort of T. pacificus, and to identify whether the simulated individuals which are transported directly into the Yellow Sea (YS) influence these resources immediately, we conducted a Lagrangian-particle-tracking numerical experiments of T. pacificus from 2005 to 2010 using LTRANS and ROMS. The results show that: (1) Most of the released individuals spread out to the open sea by the Kuroshio and the Tsushima Warm Current around 30 days after release. (2) Unlike the hypothesis proposed by Rosa et al. (2011), Around $30-33N^{\circ}$ near Jeju Island simulated the initial position (3) About 0.01% of individuals released in December were transported solely into the YS around 15 days after release. However there were no surviving individuals due to the low temperature less than $12^{\circ}C$. Also the variation of individuals entered into the YS was not significantly correlated with it in YS catches during the experimental period. Therefore, the most of resources in the YS is assumed to be more influenced by diverse factors of the Pacific Ocean and East Sea than the direct transport in the YS of winter cohort.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2009년도 학술대회 초록집
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• pp.167-173
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• 2009

2009년 국립해양조사원은 백령도 부근 해역에 대해 바다로 1호에 장착된 Simrad EM3000 다중빔 음향측심기를 이용한 수심측량조사를 실시하였으며 정확한 음속보정을 위해 1일 $7{\sim}10$회 이상의 음속을 관측하였다. 백령도 주변해역은 계절에 따라 여러 질 수괴(쿠로시오 난류, 황해 연안수 등)가 복잡하게 분포하여 여러 형태의 수온 전선이 형성되어 수층 음속 깊이가 최대 10m/s 이상의 차이를 나타냈다. 또한 난수괴 유입으로 인해 수온약층의 깊이가 지역별로 다르게 분포 하였다. 이러한 음속의 국지적 변화는 다중빔을 이용한 수심측량 자료의 정확도를 저하시키는 요인으로 작용한다. 따라서 다중빔을 이용한 수심측량 자료의 정확도를 저하시키는 요인으로 작용한다. 따라서 백령도 주변해역 수심측량 자료의 수평 수직 변화를 음선추적 이론을 이용하여 확인하였다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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• pp.289-292
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• 2008

Recently, several satellite data analyses projects and numerical weather prediction (NWP) reanalysis projects have produced the ocean surface Latent Heat Flux (LHF) data sets in the global coverage. Comparisons of these LHF data sets showed substantial discrepancies in the LHF values. Recently, the increase of LHF in during 1970s-1990s over the global ocean is shown by the LHF data that have been developed at the Objective Analyzed Air-Sea Fluxes (OAFlux) project. It is interesting to investigate the existence of the increase of LHF over a global ocean in the other LHF products. It is interesting to investigate the existence of the increase of LHF over a global ocean in the other LHF products. In this study, we assessed the consistencies and discrepancies of the inter-annual variability and decadal trend for the period 1988-2005 among six LHF products ((J-OFURO2, HOAPS3, IFREMER, NCEP1,2 and OAFlux) over the global ocean. As results, all LHF products showed a positive trend. In particular, the positive trend in satellite-based data analyses (J-OFURO2, HOAPS3, IFREMER) is larger than that in reanalysis products (NCEP1/2). Also, the consistencies and discrepancies are shown on the spatial patterns of the LHF trends across the six data sets. The positive trend of LHF is remarkable in the regions of western boundary currents such as the Kuroshio and the Gulf Stream in all LHF data sets. But, the discrepancies are shown on the spatial patterns of the LHF trends in tropics and subtropics. These discrepancies are primarily caused by the differences of the input meteorological state variables, particularly for the air specific humidity, used to calculate LHF.