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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Marine Environment & Safety
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Journal DOI :
The Korean Society of Marine Environment and safety
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Volume & Issues
Volume 16, Issue 4 - Dec 2010
Volume 16, Issue 3 - Sep 2010
Volume 16, Issue 2 - Jun 2010
Volume 16, Issue 1 - Mar 2010
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Long-term Variation and Characteristics of Water Quality In the Mokpo Coastal Areas of the Yellow Sea, Korea
Park, Soung-Yun ; Kim, Sang-Soo ; Kim, Pyoung-Joong ; Cho, Eun-Seob ; Kim, Sook-Yang ; Choi, Yoon-Suk ; Kim, Byong-Man ; Kim, Dae-Uk ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 321~337
Long-term trends and distribution patterns of water quality were investigated in the Mokpo coastal areas of the Yellow Sea, Korea from 1979 to 2009. Water samples were collected at 5 stations and physicochemical parameters were analyzed including water temperature, salinity, suspended solids (SS), chemical oxygen demand (COD), dissolved oxygen (DO) and nutrients. Spatial distribution patterns of temperature, pH and DO were not clear among stations but the seasonal variations were distinct except ammonium. The trend analysis by principal component analysis (PCA) during 30 years revealed the significant variations in water quality in the study area. Spatial water qualities were discriminated into 3 clusters by PCA; station cluster 1, 2~4, and 5. Annual water qualities were clearly discriminated into 4 surface water clusters and 2 bottom water clusters by PCA. By this multi-variate analysis, the annual trends were summarized as the followings; water temperature, pH and COD tended to increase from late 1980's, salinity to decrease, phosphate to increase from 1994 and dissolved inorganic nitrogen to increase, due to the input of fresh water same as shown in Kyoungin coastal area, Asan coastal area, Choensoo bay and Gunsan coastal area.
Development of a Field Oxygenation Device and Its Practice in the Oxygen Depleted Water Mass
Lee, Yong-Hwa ; Kim, Young-Suk ; Shim, Jeong-Min ; Kwon, Kee-Young ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 339~344
Oxygen depleted water mass can damage aquatic animals not only in direct way but also in indirect way by generating toxic substances including occurrence of hydrogen sulfide and ammonia which are also highly detrimental to animal life in the water mass. An oxygen dissolution device was developed, which makes turnover of the oxygen rich (over 20 mg/L) surface water down to the bottom where hypoxia is evident and tested the device in terms of oxygen recovery in the oxygen depleted bottom water. the device with turnover rates of
/min at the liquid oxygen injection rate of 48~26.3 L/min could recover dissolved oxygen level to 7~25 mg/L at depth 7 m to lead to the dissolution level of over 90% by the supply of liquid oxygen. The running advantage of the device is that it does not require any auxiliary tank and higher energy for operation. Therefore, it can be highly useful device to relieve damages to the farmed animals in the oxygen depleted waters.
Characteristics of Ocean Environment Before and After Coastal Upwelling in the Southeastern Part of Korean Peninsula Using an In-situ and Multi-Satellite Data
Kim, Sang-Woo ; Go, Woo-Jin ; Kim, Seong-Soo ; Jeong, Hee-Dong ; Yamada, Keiko ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 345~352
The objective of this paper is to explore the short-term variability of water temperature and chlorophyll a (Chl-a) derived from in-situ and satellite data (NOAA, Sea WiFS and QuikScat) in the upwelling region of the southeastern part of Korean Peninsula in June and August, 2007. Particularly we focused on the spatial variability of sea surface temperature(SST) and Chl-a in the East Korean Warm Current region. In the results of the in-situ data, the peaks of Chl-a in june was shown at a depth of 50m The peaks of Chl-a in August was shown at a depth of 10m at the stations 4 and 5 near the land, and a depth of 30m at the other stations. The Chl-a concentrations in August were also lower than those in june except for station 5. As a result, the peaks of Chl-a in August occurred at a depth of 20~40 m shallower than those of Chl-a in june. This indicates that the nutrient-rich water within the mixed layer depth may be immediately supplied by the coastal upwelling, which is due to the southerly component of wind. The relationship between SST and Chl-a showed a negative correlation, and the high concentration of Chl-a occurred in the cold water area. The southerly wind and the East Korean Warm Current influenced a remarkable offshore movement of the cold water and Chl-a near the coastal area.
Characteristic for Long-term Trends of Temperature in the Korean Waters
Seong, Ki-Tack ; Hwang, Jae-Dong ; Han, In-Seong ; Go, Woo-Jin ; Suh, Young-Sang ; Lee, Jae-Young ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 353~360
The result of analysis of the observed temperature data by the Serial Oceanography Investigation of National Fisheries Research and Development Institute (NFRDI) during last 41 years from 1969 to 2008 showed that sea surface temperatures in the East, West and South Sea of Korea were clearly increased. In case of 100m depth, temperature was increased in the South Sea of Korea, but it was decreased in the East Sea. Especially, the temperature around the coastal area in the East Sea was significantly decreased by the spatial distribution of long-term change of temperature on 100m depth. It should lead to the decreasing trend in the long-term change of temperature on 100 m depth in the entire East Sea. The increasing trend was clearly larger in wintertime than in summertime by a factor of about 2 It means that the long-term increasing trend of sea surface temperature in the Korean Waters is usually caused by the distinctive increasing trend in wintertime. As the results of the analysis of air temperature and wind speed on the 6stations around the coastal area in the Korean Waters, air temperature was found to be continuously increased, but wind speed to be gradually decreased in winter. The weakness of vertical mixing by decreasing of wind speed caused to make the surface mixed layer shallow. it could be considered that the increasing trend of surface temperature was caused by weak mixing between surface and intermediate layers.
Evaluation of Acute Toxicity about Leakage Waters of Antifouling Paints on Sebastes shlegeli and Artemia
Kim, Pil-Geun ; Park, Maeng-Eon ; Lee, In-Won ; Chun, Ho-Hwan ; Park, Hyun ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 361~367
The use of antifouling(AF) paints is the effective method for the protection of underwater structures from the development of marine fouling organisms. The ban on harmful substances in antifouling paints requires the development of new antifouling strategies although Tributyitin (TBT) compound had been used extensively as an active ingredient Alternatives should be as effective as conventional paints but have lower toxicity. In the present study, a TBT-free self-polishing (Cu SPC) AF paint containing
, a Cu free SPC AF paint, and a Foul-release silicone AF paint, which were commercially available, were examined to investigate environmental erects of leakage waters employing Sebastes shlegeli and Artemia. Survival rates were inversely proportional to the concentration of leakage waters from AF paints and the acute toxicity of SPC AF paints was relatively higher than that of foul release AF paints.
Zooplankton Community Structure and Copepod Production in the Seomjin River Estuary
Youn, Seok-Hyun ; Oh, Ghang-Sok ; Chung, Mi-Hee ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 369~379
Zooplankton community structure and copepod production in Seomjin River estuary were investigated at 10 stations along the salinity gradients from May 2009 to February 2010. Total zooplankton taxa were identified to be 31 in the study area and seasonal average abundance of zooplankton was
during the study period. Zooplankton community was mainly composed of coastal species in dry season. However, brackish species dominated in upper or middle part of this estuary in flood season. This study showed that the growth rates of Acartia spp. and Paracalanus parvus s.l. measured from field experiments were regulated by the variations of Hater temperature and salinity; The annual copepod production estimated by dominant copepod species was
, and the relatively high production value could be explained by the high phytoplankton standing stocks and the mass occurrence of coastal and brackish species with relation to various salinity gradients in Seomjin River estuary.
Bluefin tuna (Thunnus thynnus L.) Aquaculture in Yokjido, Tongyeong : Fluctuation of Phytoplankton and Reasonable Sinking Depth in Floating Cage
Cho, Eun-Seob ; Hwang, Hyung-Kyu ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 381~386
We have cultured the bluefin tuna in Yokjido, Tongyeong with floating cage which was vulnerable to harmful dinoflagellate, Cochiodinium polykrikoides. This study inspected a vertical migration of phytoplankton and Chl-a for reasonable sinking depth in floating cage. Furthermore, we analyzed the fluctuation of the phytoplankton including harmful dinoflagellates occurring in Yokgido for 6 years. Total cell density showed a significant monthly variation and the flora was predominated with diatoms. Gymnodinium sp. occurred 19 times, the greatest number of occurrence in all kinds of dinoflagellates during summer. In particular, the total number of occurrence at C. polykrikoides was 8, and harmful dinoflagellates such as Karenia brevis/Fibrcapsa japonica occurred. The relationship between Chl-a concentration/total cell number and sunset/sunrise was significant and reasonable sinking depth in floating cage was found to be at least 3m from the water surface, which was associated with massive fish kills caused by C. polykrikoides.
A Study on Characteristics and Limitation of Ocean Policies under Federal States - On the Basis of U.S., Canada and Australia -
Cho, Dong-Oh ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 387~391
Advanced maritime countries such as U.S., Canada, Australia, have been initiated in integrated oceans management through enactment of oceans laws and establishment of ocean policies since UNCLOS and Agenda 21. However, the oceans policies of U.S., Canada and Australia show some limitations in view of integration because of its inherent characteristics of federal government systems. The U.S., Canada and Australia have not a leading agency for integrated oceans policies, have not included jurisdiction of local governments in federal government oceans policies, and have not addressed support to private oceans sector in their ocean policies. Instead, those countries have established ad-hoc oceans committee to achieve cooperation and coordination in oceans management.
A Study on the Effects of High-lift Rudder on Ship's Maneuverability
Kim, Sang-Hyun ; Kim, Hyun-Jun ; Jun, Hee-Chul ; Yoon, Seung-Bae ; Park, Hwa-Pyeong ; Gim, Ok-Sok ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 393~399
Recently, a vessel's maneuvering performance is considered to be an important subject as marine pollution from the ships that stranded on a rock becomes more severe. So, IMO(International maritime organization) has adopted Resolution MSC.l37 to enhance international standards of ship's maneuverability. There's more than one way to improve ship's maneuverability. This research focused on improving ship's maneuverability by high-lift rudder. To predict the maneuverability, the numerical simulation model was used. The evaluation of maneuverability was carried out by turning test and zig-zag test. The results obtained with these simulation showed that the high-lift rudder would be effective in improving the turning ability of the ship. But it was clarified that there Has a possibility that course changing ability night become bad through an increase of rudder lift.
A Study on the Minimum Safety Distance between Navigation Vessels based on Vessel Operator's Safety Consciousness
Park, Young-Soo ; Jeong, Jae-Yong ; Kim, Jong-Sung ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 401~406
Vessel Operator has been navigating with subjective sate distance in accordance with night & daytime, fore & aft, port & stbd abeam and visibility situation. This sate distances may different depending on inside & outside harbor limit, current, wind and visibility situation. By now, the concept of proper sate distance between navigating vessels has been adopted in Korea, using the early 1980's foreign data. And the safe distance is being used with the same value without any consideration of inside & outside harbor and the kind of vessel. So it is necessary to evaluate or search proper distance concept based on different sate consciousness of Korean manners. This paper aims to develop the basic model for marine traffic evaluation and the new model of marine traffic congestion. Also this paper proposes the basic control guideline of vessel traffic service center. The result of this study showed that minimum sate distance should be 4.4L forward, 3.1L aft and 26L abeam in case of good visibility in daytime, considering various parameters such as visibility, day and night. Some differences Here found between the existing minimum sate distance and the new minimum sate distance derived from the result of this study.
A Study on the Improvement of Myeongnyang Waterways' Traffic Separation Scheme
Dimailig, Orlando S. ; Jeong, Jae-Yong ; Kim, Chul-Seung ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 407~414
The fairway within the area of Yul-do and Songdo located near the Myeongnyang-sudo approaches south of Mokpo harbor is well guided by traffic separation scheme and other navigational aids. However, that part of the waterways where Yul-do is located sits at the cross-roads of marine traffic and is subjected to some potential risks in the voyage navigation: the effect of climatic phenomenon, the disregard of most ships in using the western sector of the fairway creating a congestion in the eastern sector, and lastly, the disadvantageous erect of the location and height of Yul-do island that hinders good lookout. This study investigates the environmental conditions that prevailed in the area in the span of 5-year period and the marine traffic situation taken from the data within the 72-hour period The navigational hazards and marine casualties are also be presented. The results are analyzed and are made the basis of a proposal for an improved separation of traffic. Thereafter, an evaluation is carried out by using the components of marine traffic flow simulation and ES modeling index. It is evaluated through simulation by the use of full-mission ship handling simulator.
Analysis on Research Trend of "Journal of the Korean Society of Marine Environment & Safety"
Kim, Sang-Goo ; Lee, Won-Il ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 415~420
"Journal of the Korean Society of Marine Environment & Safety" is representative scientific journal about ocean environment and ocean safety in Korea. This study analyzed research trend of "Journal of the Korean Society of Marine Environment & Safety" through review of articles published in the journals for 10 years tram 2000 to 2009. On the basis of the pursuit of learning and academic constitution of "The Korean Society of Marine Environment & Safety", criteria items of analysis for research trend such as authors institution of employment, region of authors' institution, form of participation in research, article's educational nature, article's method of study, article's area of study, etc. were set up and applied to 310 research articles published in "Journal of the Korean Society of Marine Environment & Safety" for 10 years.
Global Wanning Effect on Marine Environments and Measure Practices against Global Wanning
Kim, Do-Hee ;
Journal of the Korean Society of Marine Environment & Safety, volume 16, issue 4, 2010, Pages 421~425
It has been mown that the global warming has an effectet on marine ecosystem and marine environments. Then, fisherman's activity and fishing production were decreased by changing of marine plankton composition and increasing of harmful marine organisms such as jellyfish, starfish and green laver bloom. Harmful red tides algae bloom and the deserted sea bottom often occurred due to increasing of sea water temperature and sea level rising in Korea. In this report, the cause and mechanism of the global warming phenomenon and it's effect on marine environment and marine ecosystem were introduced, and measures against global warming were suggested