http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
소청초 종합해양과학기지 Radar 파랑 관측 데이터의 신뢰도 향상
민용침(Yong chim Min),정진용(Jin Yong Jeong),심재설(Jae Seol Shim),도기덕(Ki deok Do) 한국연안방재학회 2017 한국연안방재학회지 Vol.4 No.4
Ocean Research Stations (ORSs) is the ocean platform type observation towers and measured oceanic, atmospheric and environmental data. These station located on the offshore area far from the coast, so they can produce the data without land effect. This study focused to improve the wave data quality of ORS station. The wave observations at ORSs are used by the C-band (5.8 GHz, 5.17 cm) MIROS Wave and Current Radar (MWR). MWR is convenient to maintenance and produce reliability wave data under bad weather conditions. MWR measured significant wave height, peak wave period, peak wave direction and 2D wave spectrum, so it’s can provide wave information for researchers and engineers. In order to improve the reliability of MWR wave data, Datawell Waverider Buoy was installed near the one ORS (Socheoncho station) during 7 months and validate the wave data of MWR. This study found that the wave radar tend to be overestimate the low wave height under wind condition. Firstly, this study carried out the wave Quality Control (QC) using wind data, however the quality of wave data was limited. So, this study applied the four filters (Correlation Check, Direction Filter, Reduce White Noise and Phillips Check) of MWR operating software and find that the filters effectively improve the wave data quality. After applying 3 effective filters in combination, the RMSE of significant wave height decreased from 0.81m to 0.23m, by 0.58m and Correlation increased from 0.66 to 0.96, by 0.32, so the reliability of MWR significant wave height was significantly improved.
민인기(Min, In Ki),정진용(Jeong Jin Yong),정종민(Jeong, Jong Min),민용침(Min, Yong Chim),심재설(Shim, Jae Seol) 한국연안방재학회 2015 한국연안방재학회 학술발표대회 논문집 Vol.2015 No.-
세 번째 해양과학기지인 소청초 종합해양과학기지가 건설되어 시범 운영중에 있다. 소청초 기지에는 기상, 해양, 환경 등의 관측장비, 등대, 디젤발전기와 복합 발전기, 침입자 감시장비 등이 설치되어 운영되고 있다. 이들 장비 및 설비는 원격 관측 및 제어가 가능하도록 설계와 시스템 구축이 이루어져 있으며 이를 통해 얻어지는 데이터는 위성통신망을 통해 육상 운영사무실과 송·수신이 가능하도록 시스템이 구현되어 있다. 육상에는 전송된 데이터가 안정적으로 저장, 활용될 수 있도록 서버가 설치되어 운영되고 있으며, 실시간 기반으로 기지의 모든 설비 및 장비상태를 감시하고 필요 시 원격제어할 수 있도록 기능이 갖추어져 있다.
이어도 종합해양과학기지의 비디오 이미지를 이용한 Whitecap coverage 관측 기법 수립
김선신(Sun-Sin Kim),민용침(Yong-chim Min),정종민(ong-min Jeong),민인기(In-Ki Min),정진용(Jin-Yong Jeong),심재설(Jae-Seol Shim) 한국연안방재학회 2016 한국연안방재학회지 Vol.3 No.4
Result from the global environmental changes represented by global warming, environmental variables including the sea temperature and sea surface height rise, ocean acidification, etc are reported to being in progress rapidly. Many studies have been carried out to understand the cause of the environmental changes and to deal with the impact. The environmental changes are closely related to the interaction between the ocean and atmosphere, especially in the boundary layer between them. So many studies on the energy and material, such as carbon dioxides, exchanges between the ocean and atmosphere are under going. In recent years, whitecap is recognized as the important parameters for the interaction between the ocean and atmosphere. There have been many efforts to observe and qualifying variables related to whitecap. Whitecap is the direct result from the wave breaking which have large temporal and spatial variability, and it is very hard to do quantitative observation. Previous studies have suggested the analytical solution, which defined the whitecap coverage, calculated from the wind, as a primary variable. Recently, owing to development in the image processing technologies, videos and still images are being used to observe whitecap coverage. But it has been very hard to obtain the continuous, precise wave images in the ocean. In this study, wave image obtained in the Ieodo Ocean Research Station were used to reduce the error of the conversion from image to whitecap coverage, and the formula which suggested by Sugihara et al. (2007). Specifically, it presented Pixel intensity threshold determination method and criteria image sampling frequency of Whitecap.
천해역 경사 천퇴에 설치된 해양구조물의 층하고 검토를 위한 수치해석 - 가거초 종합해양과학기지의 태풍피해 (2011)
김선신(Sun-Sin Kim),민용침(Yong-Chim Min),전인식(In-Sik Chun),심재설(Jae-Seol Shim) 한국연안방재학회 2017 한국연안방재학회지 Vol.4 No.3
The design wave and deck clearance of an offshore structure are very important factors to secure the stability of the structure after construction. In case that the structure is installed on a deep flat bottom, the deck clearance may be determined from the maximal wave crest height which can be sought by directly applying a nonlinear wave theory (Cnoidal or Stream function theory) to the design wave condition. But it is often the case that the structure is placed on a shallow underwater shoal having a steep slope due to construction expense and convenience. In this case, the wave height and depth conditions at the structural position may easily exceed the wave breaking condition beyond which the nonlinear wave theory cannot be applied. In the present study, a numerical method using a shallow water wave propagation model based on Boussinesq equation is demonstrated to reproduce the nonlinear wave deformation along up the shallow underwater shoal and the maximal wave crest height at the structural position. The method is applied to check the validity of the existing deck height of Gageocho Ocean Research Station installed on an underwater shoal in Korea. The station was damaged by typhoon Muifa in 2011 with the cellar deck and its appurtenance seriously deformed or destroyed.
김선신(Kim, Sun-Sin),민용침(Min, Yong-Chim),정종민(Jeong, Jong-Min),정진용(Jeong, Jin-Yong),유제선(Yoo, Je-Seon),심재설(Shim, Jae-Seol) 한국연안방재학회 2015 한국연안방재학회 학술발표대회 논문집 Vol.2015 No.-
백파는 해양과 대기의 기체 및 에너지 교환의 중요한 변수로써 해양의 중요한 관측 항목 중 하나이다. 이어도 종합해양과학 기지에서 해상 상태를 관찰하기 위하여 4대의 CCTV를 이용한 비디오 모니터링 시스템을 구축하여 2014년 11월부터 운영 중에 있다. 본 연구에서는 비디오 이미지를 이용한 백파 관측을 시도하였으며 세부적으로 백파 발생 시 pixel 강도의 특성을 파악하고 이를 기반으로 백파 관측기법을 수립하여 이어도 해역에 적용하였다.