초록 ▼

해양조사 분야:
- 2014년 추계 9월 12일-28일간 동중국해 해양조사실시. 제주남측 및 위도 31N 해역에서 CTD 조사, ADCP 계류 조사, TurboMap 난류관측 등 성공적 수행.
- ADCP 분석결과, 태풍 영향으로 형성되는 표층 및 연관 수온전선의 영향으로 간헐적인 내부파 관측. 수온약층에 비해 상부 혼합층과 바닥경계층에서의 연직 난류계수가 2-3order 크게 나타남 관측.
- CTD 혼합층 자료와 마이크로웨이브 자료 비교 결과 상부 15m-20m 혼합층 수온을 정확도 0.3-0.5℃내에서 일치 확

해양조사 분야:
- 2014년 추계 9월 12일-28일간 동중국해 해양조사실시. 제주남측 및 위도 31N 해역에서 CTD 조사, ADCP 계류 조사, TurboMap 난류관측 등 성공적 수행.
- ADCP 분석결과, 태풍 영향으로 형성되는 표층 및 연관 수온전선의 영향으로 간헐적인 내부파 관측. 수온약층에 비해 상부 혼합층과 바닥경계층에서의 연직 난류계수가 2-3order 크게 나타남 관측.
- CTD 혼합층 자료와 마이크로웨이브 자료 비교 결과 상부 15m-20m 혼합층 수온을 정확도 0.3-0.5℃내에서 일치 확인.
독자 (조석+해일)모델링 분야:
- 한반도 주변 연안 (조석+해일) 예측위한 모델코딩, 테스트, 북서태평양 해역 격자구성,수심투입, 외해경계조건 분석/획득 연구 수행. 세월호 침몰해역인 진도인근 조류재현 실험 실시. 동거차도 남측에 남조류시 강력한 와류가 발생 최초 재현.
- 조류 공간다양성을 확인하기 위한 방법으로서 조류타원의 시간과 조석파의 진행시간 활용. 세월호 지점과 조사원 부이관측점간의 조류지각이 약 40분의 차이가 나타남을 밝힘.연안 조류의 공간성을 감안한 조류예측이 필요함을 보임.
- 북서태평양 해일모델 최대 100m 연안 해상도. 남측경계는 북위 15°N까지 확장하여 해일5일 예보 가능. 외해경계지점에 대한 경계조건을 분석통한 외해 경계조건 획득.
태풍/해양순환 모델링 분야:
- WRF 태풍모델과 MOM4 이용한 북서태평양 순환모델 수립.
- NCEP 자료 이용한 결과, 기상청 혹은 RSMC 예측결과와 비슷한 경로 및 강도오차를 보임. SST 조건에 따른 WRF 계산 결과, 초기 효과 크지 않음.
- 북서태평양 해양모델의 특성과 EnOI를 적용결과, 쿠로시오의 이안과 동한난류의 이안 등 서안경계류를 현실에 가깝게 모의.
- 북서태평양 해양재분석 자료는 해양-태풍 결합 모델 초기장으로 입력.

Abstract ▼

Ⅳ. Result of the study
Field Observations :
- CTD casting, ADCP deployment and TurboMap measurement are carried during early autumn season (Sep. 12-28) in the shelf sea from the south of the Cheju island to the northern region of 31°N of the East China Sea, under the bad field condition effect

Ⅳ. Result of the study
Field Observations :
- CTD casting, ADCP deployment and TurboMap measurement are carried during early autumn season (Sep. 12-28) in the shelf sea from the south of the Cheju island to the northern region of 31°N of the East China Sea, under the bad field condition effect due to the typhoon Fung-Wong.
- ADCP results showed that the internal waves appear to exist intermittantly when ocean responds to the typhoon Fung-Wong, and the vertical eddy viscosity both at the upper mixed and bottom layer is larger by two order than that of thermocline layer.
- The comparison of CTD data in the upper mixed layer with temperature data by Microwave satellites showed that the SST data observed by MW coincide with the upper mixed temperature within 0.3-0.5 ℃.
Independent model development and experiment of (tide + surge) :
- Model coding, test, grid construction for the NW Pacific model, and acquisition of the tide model boundary of NW pacific were carried out during the research project period.
- Various experiments for the tidal current around Jindo, where Sewol ship sank, were carried out to reveal that the strong tidal eddies behind the East GeochaDo are generated, which was reported for the first time in the Spring special meeting of Korean Society of Ocean Sciences. This confirms that the code works successfully for the generation of the tidal current and the eddy motion.
- The model information for the tidal ellipse and propagation time of the M2 component were used to show that the time lag between Sewol point and observation buoy point is about 40 minutes, even though high water times between two points differ from each other only by several minutes. This result is under review in the professional journal.
- The NW Pacific surge model has about 140 million number of grid, 100m finest grid adopted, extending toward the 15°, reaching to the 150E° to predict the 5 day prediction of the surge. The tidal boundary condition was obtained and basic establishment for model setting up was carried out.
Typhoon/Ocean Circulation Modeling Area :
- Research study in this area was carried for setting up the typhoon prediction model (WRF) and ocean circulation model (MOM4) for the NW Pacific region.
- The WRF model, using NCEP data, shows a similar model result with RSMC and KMA in track erro and intensity prediction. The simulation for the NCEP FNL data and MOM4 reanalysis data shows a similar results in track and intensity prediction, which seems to indicate that the initial condition is not large, not expected as such. More extensive experiment results may be required before we get some general trend.
- The simulation results of the MOM4 indicates that the detachment of the Kuroshio Current and East Korean Warm Current are realistically simulated and it it though that the MOM4 setting up is generally well carried out.
- The western boundary current, such as the Kuroshio, advects the water mass with large ocean heat content and it is expected that the typhoon intensity is greatly affected by the ocean current and validation was carried out. The reproduced reanalyis data for NW Pacific will contribute to increasing the accuracy of the typhoon intensity prediction as initial field of the typhoon-ocean coupled model.