Browse > Article
http://dx.doi.org/10.7850/jkso.2014.19.2.99

Characteristics of the flow in the Usan Trough in the East Sea  

Baek, Gyu Nam (Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology)
Seo, Seongbong (Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology)
Lee, Jae Hak (Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology)
Hong, Chang Su (Ocean Circulation and Climate Research Division, Korea Institute of Ocean Science and Technology)
Kim, Yun-Bae (Ulleungdo.Dokdo Ocean Research Station, East Sea Research Institute, Korea Institute of Ocean Science and Technology)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.19, no.2, 2014 , pp. 99-108 More about this Journal
Abstract
One year long time-series current data were obtained at two stations (K1 and K2) located in the Usan Trough in the area north of Ulleungdo in the East Sea from September 2006. The observed data reveal enhanced seafloor flows in both stations with variabilities of about 20 days which is possibly governed by the topographic Rossby wave. After February 2007, strong flow in the upper layer in St. K1 appears throughout the mooring period and this is due to the passage of the warm eddy comparing with satellite sea surface temperature data. During this period, no significant correlation between the current in the upper layer and those in two deep layers is shown indicating the eddy does not affect flows in the deep ocean. It is also observed that the flow direction rotates clockwise with depth in both stations except for the upper of the K1. This implies that the deep flow does not parallel to the isobaths exactly and it has a downwelling velocity component. The possibility of the flow from the Japan Basin to the Ulleung Basin across the Usan Trough is not evidenced from the data.
Keywords
Usan Trough; Deep flow; TRW; FFT; Wavelet;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Kim Y.B., K.I. Chang, J.H. Park, and J.J. Park, 2013. Variability of the Dokdo Abyssal Current observed in the Ulleung Interplain Gap of the East/Japan Sea. Acta Oceanol. Sin., 32(1): 12-23.
2 Hogan P.J. and H.E. Hurlburt, 2000. Impact of upper ocean-topographical coupling and isopycnal outcropping in Japan/East Sea models with $1/8^{\circ}$ to $1/64^{\circ}$ resolution. J. Phys. Oceano., 30(10):2535-2561.   DOI
3 Chang K.I., K. Kim, Y.B. Kim, W.J. Teague, J.C. Lee, and J.H. Lee, 2009. Deep flow and transport through the Ulleung Interplain Gap in the southwestern East/Japan Sea. Deep-Sea Res. I, 56: 61-72.   DOI   ScienceOn
4 Hamilton P., 1984. Topographic and inertial waves on the continental rise of theMid-Atlantic Bight. J. Geophys. Res., 89(C1): 695-710.   DOI
5 Bryden H.L., 1976. Horizontal advection of temperature for low-frequency motions. Deep-Sea Res. 23: 1165-1174.
6 Park Y.G., K.H. Oh, K.I. Chang, and M.S. Suk, 2004. Intermediate level circulation of the southwestern part of the East/Japan Sea estimated from autonomous isobaric profiling floats. Geophy. Res. Lett., 31: L13213, doi:10.1029/2004GL020424.   DOI   ScienceOn
7 Rhines P., 1970. Edge-, bottom-, and Rossby waves in a rotating stratified fluid. Geophy. Fluid Dyn., 1: 273-302.   DOI   ScienceOn
8 Senjyu T., H.R. Shin, J.H. Yoon, Z. Nagano, H.S. An, S.K. Byun, and C.K. Lee, 2005. Deep flow field in the Japan/East Sea as deduced from direct current measurements. Deep-Sea Res. II, 52: 1726-1741.   DOI   ScienceOn
9 Teague W.J., K.L. Tracey, D.R. Watts, J.W. Book, K.I. Chang, P.J. Hogan, D.A. Mitchell, M.S. Suk, M. Wimbush, and J.H. Yoon, 2005. Observed deep circulation in the Ulleung Basin. Deep-Sea Res. II, 52: 1802-1826.   DOI   ScienceOn
10 Torrence C., G.P. Compo, 1998. A practical guide to wavelet analysis. Bull. Amer. Meteor. Soc., 79: 61-78.   DOI
11 Uehara K, and H. Miyake, 2000. Biweekly periodic deep flow variability on the slope inshore of the Kuril-Kamchatka Trench. J. Phys. Oceanogr, 30: 3249-3260.   DOI
12 Sudo H., 1986. A note on the Japan Sea Proper Water. Prog. Oceanogr., 17: 313-336.   DOI   ScienceOn
13 Kim K, K.R. Kim, D.H. Min, Y. Volkov, J.H. Yoon, and M. Takematsu, 2001. Warming and structural changes in the East (Japan) Sea : a clue to future changes in global oceans? Geophy. Res. Lett., 28(17): 3293-3266.   DOI   ScienceOn
14 Kim K, K.I. Chang, D.J. Kang, Y.H. Kim, and J.H. Lee, 2008. Review of Recent Findings on the Water Masses and Circulation in the East Sea (Sea of Japan). J. Oceanogr., 64: 721-735.   DOI   ScienceOn
15 Yun J.Y., L. Magaard, K. Kim, C.W. Shin, C.S. Kim, and S.K. Byun, 2004. Spatial and temporal variability of the North Korean Cold Water leading to the near-bottom cold water intrusion in Korea Strait. Prog. Oceanogr., 60: 99-131.   DOI   ScienceOn
16 Uda M., 1934. The results of simultaneous oceanographical investigations in the Japan Sea and its adjacent waters in May and June, 1932. Japan Imp. Fish. Exp. St., 5, 57-190 (in Japanese).
17 Sekma H., Y.H. Park, and F. Vivier., 2013. Time-Mean Flow as the Prevailing Contribution to the Poleward Heat Flux across the Southern Flank of the Antarctic Circumpolar Current: A Case Study in the Fawn Trough, Kerguelen Plateau. J. Phys. Oceanogr., 43: 583-601.   DOI   ScienceOn