Advanced SearchSearch Tips
Hydrographic Structure Along 131.5°W in the Eastern Tropical Pacific in July 2003
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
  • Journal title : Ocean and Polar Research
  • Volume 26, Issue 2,  2004, pp.299-309
  • Publisher : Korea Institute of Ocean Science & Technology
  • DOI : 10.4217/OPR.2004.26.2.299
 Title & Authors
Hydrographic Structure Along 131.5°W in the Eastern Tropical Pacific in July 2003
Chang, Kyung-Il; Hwang, Sang-Chul; Hong, Chang-Su;
  PDF(new window)
Conductivity-temperature-depth (CTD) data obtained along a meridional section in the eastern tropical Pacific in July 2003 have been analyzed to identify various water masses, and to examine the hydrographic structure and zonal geostrophic currents in the upper 1000 m. Water mass analysis shows the existence of subtropical and intermediate waters, characterized by layers of subsurface salinity maximum and minimum, originating from both hemispheres of the Pacific. Vertical section of temperature in the upper 200 m shows the typical trough-ridge structure associated with the zonal current system for most of the tropical Pacific. Water with the lowest salinity of less than 33.6 was found in the upper 30 m between and in a boundary zone between the North Equatorial Current and North Equatorial Countercurrent. Temporal changes in water properties observed at over a period of 9 days suggest both the local rainfall and horizontal advection is responsible for the presence of the low-salinity water. Development of a barrier layer was also observed at . In the North Equatorial Current region a local upwelling was observed at , which brings high salinity and cooler subtropical water to the sea surface. A band of countercurrent occurs in the upwelling region between and
hydrography;geostrophic zonal flows;eastern tropical Pacific;water masses;short-term variation;
 Cited by
2006년과 2007년 여름에 관측한 Hawaii-Chuuk 사이의 물리특성,신창웅;김동국;전동철;김응;

Ocean and Polar Research, 2011. vol.33. spc3, pp.371-383 crossref(new window)
Physical Oceanographic Characteristics between Hawaii and Chuuk Observed in Summer of 2006 and 2007, Ocean and Polar Research, 2011, 33, spc3, 371  crossref(new windwow)
Godfrey, J.S. and E.J. Lindstrom. 1989. The heat budget of the equatorial western Pacific surface mixed layer. J. Geophys. Res., 94, 8007-8017. crossref(new window)

Godfrey, J.S., G.C. Johnson, M.J. McPhaden, G. Reverdin, and S.E. Wijffels. 2001. The tropical ocean circulation. p. 215-246. In: Ocean Circulation and Climate: Observing and modelling the global ocean. eds. by G. Siedler, J. Church, and J. Gould. Academic Press, San Diego.

Lukas, R. and E. Lindstrom. 1991. The mixed layer of the western equatorial Pacific Ocean. J. Geophys. Res., 96, 3343-3357. crossref(new window)

Shin, H.-R., S.-C. Hwang, D. Jeon, K.-H. Kim, C.-H. Kwak, and S.-S. So. 2004. The characteristics of physical oceanographic environments and bottom currents in the KODOS area of the northeastern tropical Pacific. Ocean Polar Res., 26(2), 341-349. crossref(new window)

Sprintall, J. and M. Tomczak. 1992. Evidence of the barrier layer in the surface layer of the tropics. J. Geophys. Res., 97, 7305-7316. crossref(new window)

Talley, L.D. 1993. Distribution and formation of North Pacific Intermediate Water. J. Phys. Oceanogr., 23, 517-537. crossref(new window)

Talley, L.D., G.J. Fryer, and R. Lumpkin. 1999. Chapter 2. Oceanography. p. 19-32. In: The Pacific Islands: Environment and society. ed. by M. Rapaport. Bess Press, Honolulu.

Tomczak, M. and J.S. Godfrey. 1994. Regional Oceanography: An introduction. Pergamon, London. 422 p.

Wyrtki, K. 1982. Eddies in the Pacific North Equatorial Current. J. Phys. Oceanogr., 12, 746-749. crossref(new window)

Wyrtki, K. and B. Kilonsky. 1982. Transequatorial water structure during the Hawaii to Tahiti Shuttle Experiment. Hawaii Institute of Geophysics, Univ. Hawaii, Honolulu. 65 p.

Wyrtki, K. and B. Kilonsky. 1984. Mean water and current structure during the Hawaii-Tahiti Shuttle Experiment. J. Phys. Oceanogr., 14, 242-254. crossref(new window)