한국측량학회지 (Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography)

  • 제26권3호
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  • Pages.207-217
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  • 2008
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  • 1598-4850(pISSN)
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  • 2288-260X(eISSN)
한국측량학회 (Korean Society of Surveying, Geodesy, Photogrammetry and Cartography)
권호 표지

동아시아지역 수직기준 통일을 위한 해면지형 결정 및 분석

Determination and Analysis Sea Surface Topography for Unification Vertical Datum in East-Asia Area

  • 황학 (성균관대학교 건설환경연구소) ;
  • 윤홍식 (성균관대학교 사회환경시스템공학과) ;
  • 이동하 (성균관대학교 건설환경연구소)
  • 발행 : 2008.06.30
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초록

해면지형은 지구형상 및 지오이드의 결정, 해류, 조석의 결정에 중요한 역할을 할 뿐만 아니라 세계수직기준 통일 및 대륙 간, 지역 간, 육지와 도서지역 사이의 수직기준을 통일하기 위한 기초자료이기도 하다. 본 연구는 동아시아지역의 수직기준 통일을 위한 기초연구로 고해상도 평균해면모델인 KMSS04를 사용하여 평균해면고를 계산하고, 전 지구 중력장모델 EGM96과 TIGEN-GL04C를 이용하여 지오이드고를 구한 후 이들을 통하여 동아시아지역 및 각 조위관측소에서의 평균해면, 지오이드고 및 해면지형을 결정하고 분석하였다. 연구결과 일본해구와 Ryukyu해구 부근을 제외한 지역에서 해면지형은 비교적 안정적이며, InCheon 조위관측소를 제외한 기타 조위관측소에서는 모두 $40{\sim}60cm$에 가까운 해면지형의 기복을 나타내었다.

The SSTop (Sea Surface Topography) provides an estimate of the large scale structure of the deviations between the geoid height and the mean sea surface in terms of a normalized surface spherical harmonic series. The SSTop is the key information which has been used to determine the shape of earth, geoid, current and tide etc. Also, the SSTop is a basic source for the unification of vertical datums at the different height systems which were established according to the their respective purposes. In order to unify the vertical datum around the East-Asian (E-A) region (covers the area: $20^{\circ}-45^{\circ}N$ and $110^{\circ}-140^{\circ}E$), we estimated the value of SSTop in the E-A region using the predicted values of mean sea surface (from KMSS04) and geoid height (from EGM96 and EIGEN-GL04C) and analyzed to aspect of SSTop at 5 tidal stations (InCheon, JeJu, QingDao, Aburatsubo, KeeLung) with the estimated values of each station previously. The result from this study indicates that the SSTop in the E-A region is relatively stable except for the area around the Japanese and Ryukyu deep, and also shows that the distribution of values of SSTop is ranged from 40 to 60 cm at tidal stations except InCheon station.

키워드

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