[논문]Seasonal Volume Transport Variation and Origin of the Tsushima Warm Current

You, Sung-Hyup; Yoon, Jong-Hwan

doi:10.4217/opr.2008.30.2.193

[국내논문] Seasonal Volume Transport Variation and Origin of the Tsushima Warm Current 원문보기

Ocean and polar research, v.30 no.2, 2008년, pp.193 - 205

You, Sung-Hyup (Global Environment System Research Laboratory National Institute of Meteorological Research, KMA) , Yoon, Jong-Hwan (Research Institute for Applied Mechanics Kyushu University)

Abstract ▼ AI-Helper

A model of the current and seasonal volume transport in the East China Sea was used to investigate the origin of the Tsushima Warm Current (TSWC). The modeled volume transport field suggested that the current field west of Kyushu ($30^{\circ}-32^{\circ}N$) was divided into two regions, R1 and R2, according to the bottom depth. R1 consisted of the Taiwan Warm Current (TWWC) region and the mixed Kuroshio-TWWC (MKT) water region, while R2 was the modified Kuroshio water (MKW) region west of Kyushu. The MKW branched from the Kuroshio and flowed into the Korea/Tsushima Straits through the Cheju-Kyushu Strait, contributing 41% of the annual mean volume transport of the TSWC. The TWWC and MKT water flowed into the Korea/Tsushima Straits through the Cheju-Kyushu and Cheju Straits, contributing 32% and 27% of the volume transport, respectively. The maximum volume transport of the MKW was 53% of the total volume transport of the TSWC in November, while the maximum volume transport of the water in the R1 region through the Cheju-Kyushu Strait was 41% in July. Hence, there were two peaks per year of volume transport in the TSWC.

주제어

AI 본문요약
AI-Helper

* AI 자동 식별 결과로 적합하지 않은 문장이 있을 수 있으니, 이용에 유의하시기 바랍니다.

문제 정의

This study continues the effort to increase our understanding of the circulation in the ECS. Specifically, we investigated the seasonal variations of the circulations and water masses in the ECS, with a special focus on the origin of the TSWC.

제안 방법

2005) have shown that the volume transport through the Tsushima Strait has strong seasonal variation, with double peaks from spring to autumn. In this study, a Lagrangian drifter model using simulated high-resolution current fields was used to investigate the origin and double peak transport of the TSWC.
In the interior, conditions were restored to the climatological mean temperature and salinity data of the WOA 94 at levels deeper than 2,000 m with a longer time constant (1 year), to reduce spin-up computational time. The model was integrated for 25 years, and the last 5 years were analyzed.

대상 데이터

The model covered the Pacific Ocean from 95°E to 70°W and from 50°S to 65°N (Fig. 1).

이론/모형

Recent regional high-resolution three-dimensional numerical circulation models using realistic topography and boundary forcing have provided new insights into circulation in the ECS. The Pacific Ocean Model used in this study incorporated all of these factors and simulated a reasonable circulation pattern in the ECS.
The Research Institute for Applied Mechanics (RIAM) Ocean Model (RIAMOM) used in this study was a primitive general ocean circulation model with a free surface developed by Lee and Yoon (1994) at RIAM. The model assumed Boussinesq hydrostatic balance and solved the three-dimensional, non-linear, free-surface, primitive equations with the Arakawa B-grid system.
The “slant advection” effect was incorporated into the model to represent the vertical advection of horizontal momentum at the bottom topography as accurately as possible (Ishizaki and Motoi 1999). The model also used an improved advection scheme for tracers, i.e., the modified split quadratic upstream interpolation for convective kinematics scheme (MSQUICK; Webb et al. 1998), in both horizontal and vertical directions.
This study was performed as part of the Project for Sustainable Coexistence of Human, Nature, and the Earth, which is supported by the Ministry of Education, Culture, Sports, Science, and Technology of the Japanese government. All simulations were performed using the Earth Simulator. This paper was submitted as a part of the “Valuation on Precision Improvement of Surge Prediction System” series, which is supported by NIMR/KMA.

성능/효과

First, the region approximately between 100 m and 200 m depth south of 30°N in the ECS, with the exception of the region of the KBCNT northeast of Taiwan, appeared to be a mixing region between the Kuroshio and the TWWC.
Fourth, the TWWC barely intruded into the region deeper than 200 m south of 30°N.
Hence, the KBCNT region is defined as the Kuroshio water region. Third, the Kuroshio water intruded into the region shallower than 100 m. The region between 50 and 100 m deep is therefore defined as the TWWC region.
Region I was the Kuroshio water region deeper than 200 m south of 30°N, region II was the TWWC region between depths of 50 and 100 m, region III was the MKT region between depths of 100 and 200 m south of 30°N (excluding the KBCNT region), and Region IV was the MKW region deeper than 200 m north of 30°N. The model results showed clear development of a northward current crossing the 200-m isobath west of Kyushu. From September to February, the northward current branch from the Kuroshio west of Kyushu developed as the KBCWK, transporting the MKW of Region IV into the K/T Strait.

참고문헌 (28)

An, H.S. 1985. The numerical experiment on the circulation in the Yellow Sea and the East China Sea by means of the two layer model. J. Kor. Ear. Sci. Soc., 6, 43-48. (In Korean)
Barnier, B., L. Siefridt, and P. Marchesiello. 1995. Thermal forcing for a global ocean circulation model using a three-year climatology of ECMWF analyses. J. Mar. Sys., 6, 363-380

상세보기
Beardsley, R.C., R. Limeburner, H. Yu, and G.A. Cannon. 1985. Discharge of the Changjiang (Yangtze River) into the East China Sea. Cont. Shelf Res., 4, 7-76

상세보기
Cho, Y.K. 1995. Hydrographic and a hydraulic model of current in the Korea Strait. Ph.D. Thesis, Seoul National University, 142 p
Chuang, W.S. 1985. Dynamics of subtidal flow in the Taiwan Strait. J. Oceanogr. Soc. Japan, 41, 65-72

상세보기
Chuang, W.S. 1986. A note on the driving mechanisms of current in the Taiwan Strait. J. Oceanogr. Soc. Japan, 42, 355-361

상세보기
Fang, G., B. Zhao, and Y. Zhu. 1991. Water volume transport through the Taiwan Strait and the continental shelf of the East China Sea measured with current meters. p. 345-348. In: Oceanography of Asian Marginal Seas, ed. by K. Takano. Elsevier, Amsterdam
Guo, X., Y. Miyazawa, H. Hukuda, and T. Yamagata. 2001. Tracer experiments on the origin of the Tsushima Warm Current. p. 45-47. In: Proc. 11th PAMS/JECSS Workshop, Cheju, Korea, Apl. 11-13
Hofmann, E.E., K.S. Hedstorm, J.R. Moisan, D.B. Haidvogel, and D.L. Mackas. 1991. Use of simulated drifter tracks to investigate general transport patterns and residence times in the coastal transition zone. J. Geophys. Res., 96(C8), 15041-15052

상세보기
Ichikawa, H. and R.C. Beardsley. 1993. Temporal and spatial variability of volume transport of the Kuroshio in the East China Sea. Deep Sea Res., 40, 583-605

상세보기
Ichikawa, H. and R.C. Beardsley. 2002. The current system in the Yellow and East China Seas. J. Oceanogr., 58, 77-92
Ishizaki, H. and T. Motoi. 1999. Reevaluation of the Takano-Oonishi scheme for momentum advection of bottom relief in ocean models. J. Atmos. and Ocean. Tech., 16, 1994-2010

상세보기
Isobe, A. 1999. On the origin of the Tsushima Warm Current and its seasonality. Cont. Shelf Res., 19, 117-133

상세보기
Kim, K., H.K. Rho, and S.H. Lee. 1991. Water masses and circulation around Cheju-do in summer. J. Oceanol. Soc. Korea, 26, 262-277
Kondo, M. 1985. Oceanographic investigations of fishing grounds in the East China and the Yellow Sea. Bull. Seikai Region. Fish. Res. Lab., 62, 19-55
Lee, H.C. and J.H. Yoon. 1994. On the free surface OGCM. Proc. of Fall Meeting the Japan Oceanogr. Soc., 225-226
Levitus, S., R. Burgett, and T.P. Boyer. 1994. World ocean atlas, Vol. 3: Salinity. NOAA Atlas NESDIS, 3, 99 p
Levitus, S. and T.P. Boyer. 1994. World ocean atlas, Vol. 4: Temperature. NOAA Atlas NESDIS, 4, 117 p
Lie, H.-J. 1986. Summertime hydrographic features in the southeastern Hwanghae. Prog. Oceanogr., 17, 229-242

상세보기
Lie, H.-J. and C.-H. Cho. 1994. On the origin of the Tsushima Warm Current. J. Geophys. Res., 99, 25081-25091

상세보기
Lie, H.-J., C.-H. Cho, J.-H. Lee, P. Niller, and J.-H. Hu. 1998. Separation of the Kuroshio water and its penetration onto the continental shelf west of Kyushu. J. Geophys. Res., 103, 2963-2676

상세보기
Lie, H.-J., C.-H. Cho, J.-H. Lee, S. Lee, and Y. Tang. 2000. Seasonal variation of the Cheju Warm Current in the northern East China Sea. J. Oceanogr., 56, 197-211

상세보기
Lin, K., B. Guo, and Y. Tang. 2001. An analysis on observational surface current in the Yellow Sea and the East China Sea. p. 67-71. In: Proc. 11th PAMS/JECSS Workshop, Cheju, Korea, Apl. 11-13
Noh, Y. and H.J. Kim. 1999. Simulations of temperature and turbulence structure of the oceanic boundary layer with the improved near surface process. J. Geophys. Res., 104, 15621-15634

상세보기
Noh, Y., C.J. Jang, T. Yamakata, P.C. Chu, and C.H. Kim. 2002. Simulation of more realistic upper-ocean processes from an OGCM with a new ocean mixed layer model. J. Phys. Oceanogr., 32, 1284-1307

상세보기
Qiu, B. and N. Imasato. 1990. A numerical study on the formation of the Kuroshio Counter Current and the Kuroshio Branch Current in the East China Sea. Cont. Shelf Res., 10, 165-184

상세보기
Takikawa, T., J.H. Yoon, and K.D. Cho. 2005. The Tsushima Warm Current through the Tsushima Straits estimated from ADCP data by ferryboat. J. Phys. Oceanogr., 35, 1154-1168

상세보기
Webb, D.J., B.A. de Cuevas, and C.S. Richmond. 1998. Improved advection scheme for ocean models. J. Atmos. Ocean. Tech., 15, 1171-1187

상세보기

LOADING...

내보내기 구분	파일저장 인쇄 메일전송
구성항목	기본정보 상세정보 관리번호, 논문명, 저널/프로시딩명, 저자 , 발행년, 권, 호, 시작페이지, 끝페이지, 발행기관 관리번호, 논문명, 대등논문명, 저자 , 저널/프로시딩명, 발행기관, 발행년, 발행언어, 권, 호, 시작페이지, 끝페이지, ISBN, ISSN, 주제분야, 키워드, 초록(한글), 초록(영문), 저자(소속기관)
저장형식	Text(ASCII format) Excel format RefWorks Direct Export RIS format (for Reference Manager, ProCite, EndNote), Scholar's Aids, Mendeley
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증