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김준택,노홍길,김상현,고준철,문승업 제주대학교 해양과환경연구소 2001 해양과환경연구소 연구논문집 Vol.25 No.-
We studied the characteristics of bottom topography and oceanographic conditions around Marado and Jeju Island. The obtained results are summarized as follow ; 1. A bottom topography around Marado is shows irregular radiation shape with abyssal zone depth from 100m to 150m, in spite that the depth below 100m is shown in the north and the depth below 100∼120m is shown widely and flatly in south. In addition to the fronts of temperature and salinity formed between inshore water and oceanic water, small-size eddies and actively horizontal and vertical mixings are formed by strong tide and geographical features including irregular topography and an isolated island. 2. Adjacent seas of the Marade are greatly influenced by the Tsushima current. The Tsushima water branches in two directions of northeast and northwest in the sourth sea of Jeju Island. The northwest current shows high temperature and salinity than the northeast, so such inflowing plays a role inducing high temperature and salinity water.
제주도 연안 인공어초 시설어장의 자원조성과 생산효과에 관한 연구
안영화,김준택 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-
The adhesive condition of shellfish and seaweeds and effects of production for artificial reefs were surveyed through field investigation during the period of 1994 -1998 in the coast of Jeju Island. The obtained results are summarized as follows : 1. 4 species of shellfish & 44 fishies (950g/㎥) were found at Overbridge type reefs area in the coast of Hado-Rj and 2 species of shellfish & 21 fishies (475g/㎥) were found a t Horn trangular type reefs area in the coast of Ilgwa-Ri and 1 species of shellfish & 6 fishies (30g/㎥) were found a t Horn trangular type reefs area in the coast of Biyang-Do. This shows a high density of shellfish in that area except for Biyang-Do reefs area. 2. Adhesive living condition of seaweeds was showed 9 species (8.270g/㎥) in the Hado-Ri and 5 species (330g/㎥) in the Ilgwa-Ri and 5 species (10.490g/㎥) in the Biyang-Do grounds. This showed a high density of Ecklonia cava and Sargassum fulvellum in that area except for Biyang-Do reef area. but Biyang-Do area was a high density of Codium fragile 3. The result are catch per unit from trammel nets. artificial reef area was showed 5 species & 16 fishies (2.950g) and natural reef area was showed 4 species & 34 fishies (2.300g). Thus. a catched fishes in the artificial reef area was large size. natural reef area was small size fishes and control area was floating fishes.
제주도 연안 인공어초 시설어장의 자원조성과 생산효과에 관한 연구
안영화,김준택 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-
The adhesive condition of shellfish and seaweeds and effects of production for artificial reefs were surveyed through field investigation during the period of 1994~1998 in the coast of Jeju Island. The obtained results are summarized as follows : 1. 4 species of shellfish & 44 fishies (950g/m2) were found at Overbridge type reefs area in the coast of Hado-Ri and 2 species of shellfish & 21 fishies (475g/m2) were found at Horn trangular type reefs area in the coast of Ilgwa-Ri and 1 species of shellfish & 6 fishies (30g/m2) were found at Horn trangular type reefs area in the coast of Biyang-Do. This shows a high density of shellfish in that area except for Biyang-Bo reefs area. 2. Adhesive living condition of seaweeds was showed 9 species (8.270g/m2) in the Hado-Ri and 5 species (4 330g/m2) in the Ilgwa-Ri and 5 species (10.490 g/m2) in the Biyang-Do grounds. This showed a high density of Ecklonia cava and Sargassumm fulvellum in that area except far Biyang-Bo reef area, but Biyang-Do area was a high density of Codium fragile. 3. The result are catch per unit from trammel nets, artificial reef area was showed 5 species & 16 fishier (2.950g) and natural reef area was showed 4 species & 34 fishies (2.300g). Thus. a catched fishes in the artificial reef area was large size. natural reef area was small size fishes and control area was floating fishes.
노홍길,방익찬,김상현,현경훈,김준택,양영진,홍창수 제주대학교 해양연구소 1997 해양자원연구소연구보고 Vol.21 No.-
Currents are measured in the Straits of Cheju by detecting surface buoy tracks and mooring current meters in 1996-1997. As a result, north-eastward currents are decteted in the Straits of Cheju all the year round, which is weak in spring and strong in summer and fall. Average speeds of 20 cm/s to the east. 7 cm/s to the north and 22 cm/s to the north-east appeared in the surface. Currents are fast in the middle of the strait and slow near Cheju Island. East-west components of the currents are about 3 times faster than the north-south ones. Also. it is shown that surface buoys released within the distance of 6 miles away from Cheju do not drift out of the Straits of Cheju because of tongue-like warm waters appeared in the eastern entrance of the strait. Volume transports calculated by geostrophic calculation are shown to be 0.05-0.2 Sv in winter and 0.4-0.5 Sv in summer.
현경훈,방익찬,노홍길,김준택 제주대학교 해양연구소 1998 해양자원연구소연구보고 Vol.22 No.-
Main route of Tsushima Warm Current (TWC) and a roundabout flow near Goto Islands were examined by water mass analysis and geostrophic calcualtion with hydrographic data observed in the sea between Cheju and Gotto Islands in winter, spring, 1998 and summer. 1994. Most of warm and saline waters which distribute in the center of Cheju-Gotto channel in winter link with waters from the southwest but not to link with waters from the southeast of Gotto Islands. Warm and saline waters near Gotto Islands seems to turn around the islands and to go southward along the iso-bath line. Geostrphic calculation shows that volume transports passing through Cheju-Gotto channel is about 26.9 Sv in winter. 16.4 Sv in spring and summer. But volume transport in the depths of 100-150m is a little larger in summer than in winter. which supports the fact that transport volume passing the western channel of Korean Straits is two times larger in summer than in winter.