Several improvements have been made recently to deal with the thermodynamic properties of seawater and a self-consistent expression for Gibbs potential functions was proposed by Feistel (2003, 2005). Based on this expression and hydrographic datasets, specific entropy, potential density, and potential temperature are calculated and analyzed. It is shown that there exists a significantly high correlation between specific entropy and potential temperature, while the distribution of entropy is not identical to that of potential density or neutral density in the ocean. In addition, a geostrophic streamfunction on isentropic surface is deducted, and the result shows that there exists Montgomery streamfunction on the isentropic surface and the geostrophic flow moves isentropically and isopycnally in order to keep its motion occur without change in the density and entropy of the water mass.
Yan-Yao-Fang
,
Gan-Zi-Jun-
. Specific entropy and isentropic analysis in the ocean[J]. Journal of Tropical Oceanography, 2011
, 30(5)
: 1
-7
.
DOI: 10.11978/j.issn.1009-5470.2011.05.001
[1] GILL A E. Atmosphere-ocean dynamics [M]. New York: Academic Press, 1982: 208-237.
[2] PICKARD G L, EMERY W J. Descriptive physical oceanography: An introduction (5th Enlarged Edition) [M]. Oxford: Pergamon Press, 1990: 128-130.
[3] WüST G. The Stratosphere of the Atlantic Ocean[M]. EMERY W J. New Delhi: Amerind, 1978: 1-112.
[4] PARR A E. On the probable relationship between vertical stability and lateral mixing processes [J]. J Conserv, 1936, 11: 308-313.
[5] PARR A E. A contribution to the hydrography of the Caribbean and Cayman Seas based upon the observations made by the research ship “Atlantis”, 1933-34 [J]. Bulletin of the Bingham Oceanographic Collection, 1937, 5(4): 1-110.
[6] PARR A E. Isopycnic analysis of current flow by means of identifying properties [J]. J Mar Res, 1938, 1: 133 -154.
[7] PARR A E. Further observations on the hydrography of the Eastern Caribbean and adjacent Atlantic waters [J]. Bull Bingham oceanogr Coll, 1938, 6 (4): 1-29.
[8] MONTGOMERY R B. A suggested method for representing gradient flow in isentropic surfaces [J]. Bull Amer Met Soc, 1937, 18: 210-212.
[9] MONTGOMERY R B. Circulation in upper layers of southern North Atlantic deduced with use of isentropic analysis [J]. Pap Phys Oceanogr Meteor, 1938, 6(2): 1-55.
[10] MCDOUGALL T J. Neutral surfaces [J]. J Phys Oceanogr, 1987, 17: 1950-1964.
[11] JACKETT D R, MCDOUGALL T J. A neutral density variable for the world's oceans [J]. J Phys Oceanogr, 1997, 27: 237-263.
[12] TALLEY L D, PICKARD G L, EMERY W J, et al. Descriptive physical oceanography: An introduction [M]. 6th ed. Boston: Elsevier, 2011: 560.
[13] GRIFFIES S M. fundamentals of ocean climate models[M]. Princeton: Princeton University Press, 2004: 117-124.
[14] FOFONOFF N P. Physical properties of sea-water [M]// HILL M N. The Sea. New York: Interscience, 1962: 3-30.
[15] FEISTEL R. A new extended Gibbs thermodynamic potential of seawater [J]. Progress in Oceanography, 2003, 58: 43-115.
[16] FEISTEL R. Numerical implementation and oceanographic application of the Gibbs thermodynamic potential of seawater [J]. Ocean Science, 2005, 1: 9-16.
[17] CONKRIGHT M E, LOCARNINI R A, GARCIA H E, et al. World Ocean Atlas 2001: Objective analyses, data statistics, and figures, CD-ROM documentation [M]. National Oceanographic Data Center, Silver Spring, MD, 2002: 17.
[18] HESS S L. Introduction to theoretical meteorology [M]. New York: Henry Holt and Company, 1959: 99-150.
[19] KAMENKOVICH V M. 海洋动力学基础 [M]. 赵俊生, 耿世江, 译. 北京: 海洋出版社, 1983: 14-20.
