• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume I
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• pp.487-490
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• 2006

Ocean Color Monitor (OCM) onboard the Indian Remote Sensing Satellite IRS-P4 has been used to retrieve chlorophyll concentration in the Bay of Bengal and the Arabian Sea using a bio-optical algorithm. Cloud masking and atmospheric corrections have been performed before applying mapping function to derive chlorophyll concentration from IRS-P4 OCM data. We have retrieved chlorophyll concentration from OCM, and MODIS during the summer and winter season along the eastern and western coast of India at every 1 degree latitude at increasing distance (25, 50, 100, 150 and 200km) away from the coast as well as near river mouths for the period 2000-2003. We have also studied spatial and temporal dynamics of monthly MODIS Aqua (for period July 2002-April 2004). The seasonal dynamics of chlorophyll concentration over the Bay of Bengal and the Arabian Sea have been discussed using OCM and MODIS for both the coastal region and the open sea.

• Ocean Science Journal
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• 제43권3호
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• pp.147-152
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• 2008

The seasonal variability of sonic layer depth (SLD) in the central Arabian Sea (CAS) (0 to $25^{\circ}N$ and $62-66^{\circ}E$) was studied using the temperature and salinity (T/S) profiles from Argo floats for the years 2002-2006. The atmospheric forcing responsible for the observed changes was explored using the meteorological data from NCEP/NCAR and Quickscat winds. SLD was obtained from sound velocity profiles computed from T/S data. Net heat flux and wind forcing regulated SLD in the CAS. Up-welling and down-welling (Ekman dynamics) associated with the Findlater Jet controlled SLD during the summer monsoon. While in winter monsoon, cooling and convective mixing regulated SLD in the study region. Weak winds, high insolation and positive net heat flux lead to the formation of thin, warm and stratified sonic layer during pre and post summer monsoon periods, respectively.

• Ocean Science Journal
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• 제42권4호
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• pp.241-246
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• 2007

Northern Arabian Sea (NAS) between $17^{\circ}N-20.5^{\circ}N$ and $59^{\circ}E-69^{\circ}E$ was observed by using Argo float daily data fur about 9 months, from April 2002 through December 2002. Results showed that during April - May mixed layer shoaled due to light winds, clear sky and intense solar insolation. Sea surface temperature (SST) rose by $2.3^{\circ}C$ and ocean gained an average of 99.8 $Wm^{-2}$. Mixed layer reached maximum depth of about 71 m during June - September owing to strong winds and cloudy skies. Ocean gained abnormally low $\sim18Wm^{-2}$ and SST dropped by $3.4^{\circ}C$. During the inter monsoon period, October, mixed layer shoaled and maintained a depth of 20 to 30 m. November - December was accompanied by moderate winds, dropping of SST by $1.5^{\circ}C$ and ocean lost an average of 52.5 $Wm^{-2}$. Mixed layer deepened gradually reaching a maximum of 62 m in December. Analysis of surface fluxes and winds suggested that winds and fluxes are the dominating factors causing deepening of mixed layer during summer and winter monsoon periods respectively. Relatively big]h correlation between MLD, net heat flux and wind speed revealed that short term variability of MLD coincided well with short term variability of surface forcing.

• Natural Product Sciences
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• 제6권2호
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• pp.61-65
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• 2000

The ethanolic extracts of marine green, brown and red algae collected from Karachi coasts of Arabian Sea afforded a new enol-derivative of N-acylsphingosine named as coelarthenol (1) from Coelarthrum muelleri, two new glucose-derivatives named: botryenal (2) and botryenol (3) from Botryocladia leptopoda, ${\alpha}-tocopherol$ quinone (4) from Codium iyengarii, ${\beta}-sitosterol$ and hexadecanoic acid from Stokeyia indica. The known constituents (4, ${\beta}-sitosterol$ & hexadecanoic acid) have not been reported so far from their corresponding sources and the structures were determined through spectroscopic methods, whereas, the structures of new constituents (1-3) were elucidated with the aid of selective HMBC experiments. The phytotoxicity of 4 was also monitored.

• International Journal of Naval Architecture and Ocean Engineering
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• 제8권4호
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• pp.312-319
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• 2016

Measured wave data covering two years simultaneously at 3 locations along the eastern Arabian Sea reveals the presence of long-period (peak wave period > 18 s) low-amplitude waves (significant wave height < 1 m) and the characteristics of these waves are described in this article. In a year, 1.4-3.6% of the time, the low-amplitude long-period swells were observed, and these waves were mainly during the nonmonsoon period. The wave spectra during these long-period swells were multi-peaked with peak wave period around 18.2 s, the secondary peak period around 13.3 s and the wind-sea peak period at 5 s. The ratio of the spectral energy of the wind-sea peak and the primary peak (swell) was slightly higher at the northern location (0.2) than that at the southern location (0.15) due to the higher wind speed present at the northern location.

• KSBB Journal
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• 제15권1호
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• pp.27-34
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• 2000

남해안 유류 오염지역으로부터 유류분해능이 우수한 균주를 선별하여 동정한 결과 Pseudomonas aeruginosa로 동정되었으며, Pseudomonas aeruginosa BYK-2로 명명하였다. 균 성장 및 생물 유화제 생산을 위한 최적배양온도, 시간, pH, NaCl 농도는 각각 $25^{\circ}C$, 48시간, 7.0 이었으며, NaCl은 첨가하지 않았을 때 가장 많은 양의 생물유화체가 생산되었다. 본 균주의 경우, 1%(w/v) arabian light 원유와 bunker C oil을 기질로 7일간 배양한 결과 92.1%(w/w)와 76.2%(w/w)가 생분해되었다. n-hexadccane 에 대한 세포부착능이 실험에서는 탄화수소화합물들(arabian light 원유, kuwait 원유, bunker C 유, n-paraffine, n-hexadecane, n-tetradecane)을 기질로 배양했을때는 모두 80% 이상의 높은 세포부착능을 나타냈으며, 지방산들(oleic acid, olive oil, lecithin)중에는 lecithin을 기질로 배양했을 때 91.5%로 가장 높은 세포부착능을 나타냈어다. 또한 당들(arabinose, trehalose, dextrose, galactose, lactose, fructose, maltose, sorbitol, sucrose)을 기질로 했을 경우 arabinose, galactose, sorbitol, sucrose를 제외하고는 대부분 70%이하의 세포부착능을 나타냈다.

• 한국전산유체공학회:학술대회논문집
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• 한국전산유체공학회 2008년도 12th Asian Congress of Fluid Mechanics
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• pp.28.3-28.3
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• 2008

• 대한지리학회지
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• 제34권5호
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• pp.507-516
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• 1999

세계 25개 이상의 공해의 명칭은 특정 국가나 주의 지명을 따라고 있다. 이러한 명칭들이 널리 받아들여지고 있는 것은 아니지만 몇몇 경우에는 심각한 논쟁을 야기하고 있다. 공해의 국가 지명 사용에 대한 갈등의 수준을 체계적으로 조사해 보면, 이러한 갈등은 공해의 명칭에 사용된 국가의 지배권에 대한 야망을 우려하는 이해 당사자 국가들 사이에 힘의 관계가 변화하는 곳에서 일어나기 쉬움을 알 수 있다. 이는 공해의 국가지명 사용에 대한 상당한 논쟁이 존재하는 다음의 세 상황-The Persian / Arabian Gulf와 The Sea of Japan / East Sea, 그리고 South China Sea / Bien Dong - 의 경우에도 그러하다. 이러한 논쟁이 거의 나타나지 않는 경우는 그 지역에 어떠한 나라도 지명 문제에 대해서 심각한 이해관계를 가지고 있지 않거나, 혹은 해양과 결합된 명칭이 그 지역의 다른 국가들에게 역사적인 위협을 주지 않는 경우이다. 국가나 주의 이름을 따른 공해의 명칭은 단일 민족이나 정치적 존재에 의한 소유권이나 통제권을 내포하고 있기 때문에, 잠재적으로 분쟁 가능성이 있다. 지명을 둘러싼 이러한 논쟁을 이해하기 위해서는 지정학적 문맥에 대한 고려가 요구된다.

• 한국항해학회지
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• 제25권1호
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• pp.77-91
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• 2001

본 연구의 목적은 통일신라시대의 해상왕 장보고의 해상항로를 추정하기 위하여 우리나라 고대부터 통일신라시대까지의 해상활동, 그리고 당시의 중국과 일본의 해상활동을 우리나라와 중국의 고대 문헌, 그리고 9세기 초 아랍의 지리학자인 Ibn Khurdahbih와 Al-Biruni, Al-Idrisi의 문헌 등을 고찰하고, 이를 근거로 하여 통일신라시대의 해상왕 장보고의 해상항로를 추정하는데 있다. 연구의 결과 해상왕 장보고는 우리나라 고대부터 축적된 조선술과 항해술을 이용하여 노철산 항로, 황해 횡단항로, 동지나 횡단항로, 황해와 남지나해를 연결하는 해상항로, 황해$\longrightarrow$남해$\longrightarrow$대마도를 연결하는 대마도 항로, 신라$\longrightarrow$울릉도 가느이 동해 항로, 발해와 일본을 연결하는 동해 직항로, 그리고 중국의 주산군도를 기점으로 하여 북쪽을 향하는 해상항로와 남쪽으로 가는 해상항로를 이용하여 중국, 일본 등과 교류를 하였고, 당나라의 연안을 따라 광주$\longrightarrow$남지나해$\longrightarrow$베트남$\longrightarrow$싱가포르 해협$\longrightarrow$말라가 해협$\longrightarrow$스리랑카$\longrightarrow$인도$\longrightarrow$인도양$\longrightarrow$페르시아만의 아랍국가$\longrightarrow$아프리카 동쪽 해안을 연결하는 서방 해상항로, 그리고 당나라의 광주$\longrightarrow$유구$\longrightarrow$통일신라$\longrightarrow$통일신라를 연결하는 해상항로를 이용하여 중국, 일본뿐만 아니라 베트남, 인도네시아, 말레이시아, 스리랑카, 인도, 페르시아만의 아랍-이슬람 제국과도 해상항로를 개설하여 활발한 해상활동을 하였던 것으로 추정이 된다.

• Journal of the korean society of oceanography
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• 제37권3호
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• pp.154-159
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• 2002

Satellite remote sensing technology for ocean observation has evolved considerably in these last twenty years. Ocean color is one of the most important parameters of ocean satellite measurements. This paper describes a remote sensing of ocean color data project - Asian I-Lac Project; it also introduces several case studies using satellite images in the Asian waters. The Asian waters are related to about 30 Asian countries, representing about 60% of the world population. The project aims at generating long-term time series images (planned for 10 years from 1996 to 2006) by combining several ocean color satellite data, i.e., ADEOS-I OCTS and SeaWiFS, and some other sensors. Some typical parameters that could be measured include Chlorophyll- a (Chl-a), Colored Dissolved Organic Matter (CDOM), and Suspended Material (SSM). Reprocessed OCTS images display spatial variation of Chl-a, CDOM, and SSM in the Asian waters; a short term variability of phytoplankton blooms was observed in the Gulf of Oman in November 1996 by analyzing OCTS and NOAA sea surface temperature (SST)； Chl-a concentrations derived from OCTS and SeaWiFS have also been evaluated in coastal areas of the Taiwan Strait, the Gulf of Thailand, the northeast Arabian Sea, and the Japan Sea. The data system provides scientists with capability of testing or developing ocean color algorithms, and transferring images for their research. We have also analyzed availability of OCTS images. The results demonstrate the potential of long-term time series of satellite ocean color data for research in marine biology, and ocean studies. The case studies show multiple applications of satellite images on monitoring of coastal environments in the Asian Waters.