• Korean Journal of Fisheries and Aquatic Sciences
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• v.24 no.6
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• pp.428-436
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• 1991

Double shelf topography allows the existence of two sets of waves propagating in opposite directons. In the case that two shelves are apart sufficiently enough, the solutions show two independent sets of waves which recover the single shelf waves. However, if the distance between two shelves is less than the Rossby deformation radius, the waves become dependent on the geometry of both shelves. Even over a double shelf topography, shelf waves propagate with the shallow water to the right in the Northern Hemisphere. The group velocity of shelf wave has the same direction as phase velocity in the long wave case, but the opposite direction in the short wave case. Each shelf mode has a zero group velocity at some intermediate value of wave length.

• Proceedings of the Korean Quaternary Association Conference
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• 2004.06a
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• pp.7-7
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• 2004

한국 남동해역 대륙붕에서 취득된 고해상 탄성파 탐사자료와 퇴적물 시료의 분석에 의하면 후 제4기 퇴적층은 마지막 빙하기 이후의 해수면 변화에 의해 조절되는 저해수면계열, 해침계열, 고해수면계열로 구성된다. 시퀀스 경계면 위의 저해수면계열(층서단위 I)은 마지막 빙하기 동안 퇴적된 니질사 혹은 사질니 퇴적물로 구성되며 대륙붕단과 해곡의 외해역에 분포한다. 해침면과 최대 해침면 사이에 위치하는 해침계열(층서단위 II)은 지난 15,000-6,000년 사이에 퇴적되었으며 주로 사질퇴적물로 구성된다. 해침계열은 연구해역 전반에 걸쳐 넓게 분포하지만 저해수면계열과 고해수면계열에 비해 박층으로 분포한다. 이러한 해침계열은 분포특성에 따라 3개의 소퇴적단위로 세분된다. 즉, 대륙붕단의 초기해침계열(Unit IIa), 중간대륙붕의 중기해침계열(Unit IIb), 내대륙붕의 후기해침계열(Unit IIc)등으로 이들은 후배열층서의 특성을 가진다. 최대해침면 상부에 놓이는 고해수면계열(층서단위 III)은 해수면이 현 수준에 도달한 지난 약 6,000년 이후에 퇴적된 현생 니질 퇴적물로 구성되며 내대륙붕의 연안을 따라 제한적으로 분포한다.

• The Science & Technology
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• v.30 no.6 s.337
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• pp.32-34
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• 1997

"대륙붕한계위원회는 앞으로 대륙붕 200마일 바깥 한계에 대한 연안국 주장을 과학적 근거와 자료를 바탕으로 심사 평가하게 될 것입니다." 지난 3월 UN대륙붕한계위원회에 위원으로 당선된 서울대 해양학과 박용안 교수의 설명이다. 우리나라의 대륙붕은 국토면적의 2.8~3.5배로 앞으로 인접국과의 관할권분쟁이 일어날 경우 박위원의 역할이 기대된다.

• 한국해양학회지
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• v.22 no.1
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• pp.43-56
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• 1987

A study on sedimentation, geochemical behavior and seismic stratigrapht of the continental shelf sediments along the Korea Strait and a part of south and southeast offshore area of the Korea Peninsula was carried out. In the inner shelf floor with depth ranging up to 80m zonal distribution patterns of mud, sandy silt, and silty sand were observed. In the outer shelf, however, coarse sandy sediments are dominant, and shills and gravels were frequently observed. These observations seem to confirm the Holocene sedimentary processes on the continental shelves off the south, south to east coasts of Korea discussed by Park (1985 and 1986) and Park and Choi (1986). The suface sediments (upper most 5cm thick)from selected 9 stations were analyzed for Al,Mn, Fe,Cr,Ni,Cu,Zn and Pb in order to study geochemical behavior of the sediments in the study area. All data were normalized to Al to com,pensate the size effect of the sediments.In general,inner shelf sediments show slight enrichment compared to the outer shelf sediments.In particular,Pb and Zn show heavy enrichment in most of the sediments.to degrees comparable to those observed at the polluted Kwangyang and Masan Bay sediments.Thus,it is considered that rapid migration or movement of fine-grained sediments in the study area does exist. Three seismic stratigraphic units were analyzed based on the seismic records.The acoustic basement the lower sedimentary deposit(B)and the upper deposit(A)were observed.The strong reflectivity R,in particular, between unit A and B is considered to be an erosinal unconformity during the last Glacial time.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.25 no.6
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• pp.443-456
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• 1992

For a linear double shelf bottom topography as in the Yellow Sea, the dispersion relation of coastally trapped waves is derived for the general case Including high-frequency and short waves and for the case of low-frequency and long waves. With linear bottom topography, the governing equation is Bessel's equation for the latter case but Hummer's equation for the former case. Hypergeometric Functions, which are the solutions of Hummer's equation, are derived and converted to various special functions for the limiting cases. On a double shelf topography, the divergence effects of horizontal flow are important for the wave dynamics, irrespective of cross-shelf dimensions, while on a single shelf they are usually neglected when the cross-shelf dimension is much smaller than the Rossby deformation radius. The divergence effect allows the existence of Kelvin wave and reduces the phase speeds of continental shelf waves. Finally, the frictionless eigenfunctions are proved to be orthogonal.

• The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY
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• v.4 no.3
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• pp.208-214
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• 1999

In order to determine if there is any physiographic preference for sedimentary organic matter preservation, two gravity cores were collected off Gampo, East Sea: one from continental shelf and the other from continental slope. Concentrations of porewater nutrients and total $CO_2$ were all higher in the continental shelf station, St. A, than the continental slope station, St. B. Meanwhile, concentrations of porewater sulfate decreased more rapidly at St. A than at St. B. Sedimentary organic carbon and nitrogen contents were lower and decreased more rapidly at St. A than at St. B. These data characters of porewater chemistry and sedimentary organic matter suggest that the organic matter is more actively decomposed at St. A than at St. B. At least over the study area, therefore, the sedimentary organic matter in the continental slope appears to be better preserved than that in the continental shelf.

• 한국해양학회지
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• v.21 no.1
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• pp.34-45
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• 1986

A Q-mode factor analysis for 115 surficial bottom sediments on the continental shelf off the southeast coast of Korean Peninsula(the Korea Strait) has been carried out to determine the depositional environments. The first four factors are taken as the "principal" factors, and the results are considered to represent the depositional history and sedimentary processes in relation to the Holocene sea-level changes. The fact implies that the sediments are grouped as outer-shelf relict sand sediments, inner-shelf modern muddy sediments, and finally the palimpsest sediments that are mainly distributed within and around the Korea Trough.

• The Korean Journal of Quaternary Research
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• v.3 no.1
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• pp.1-15
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• 1989

The Holocene marine surficial sediments and submarine morphology of the continental shelf of the Korea South Sea have been investigated to understand the evolutionary history of tile continental shelf sedimentation in relation to Holocelle sea level fluctuations. It is considered that along 120m $\pm$ $\alpha$ water depth of so-called Pusan Trough between the Tsushima Island and Pusan, Korea the lowest stand of Holocene sea level seems to be existed.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.22 no.2
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• pp.79-85
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• 1989

The generation and propagation of shelf wave-like oscillations induced by local wind at a basin with continental shelf and slope are studied by a numerical experiment. Three types of vortices are generated along western boundary and they propagate along the boundaries in the counter-clockwise direction. The first vortex is generated at the early stage of wind stress and its center is located off the continental slope. The second type centered on the continetal slope is generated at about the terminating time of wind stress and follows the first one. The third, centered on continental shelf, decays so soon that its propagation pattern is hard to be identified. Each of those vortices is probably to be one of free modes of the model basin.

• Proceedings of the KSEEG Conference
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• 2007.04a
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• pp.249-251
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• 2007