The Thermodynamic Equation of Seawater 2010 and Its Comparison with the Equation of Seawater 1980
Received date: 2012-03-22
Revised date: 2012-06-04
Online published: 2012-09-10
With the International Temperature Scale 1990 and the Absolute Salinity that accounts for the effects of the spatial variation of seawater composition around the world ocean, the new International Thermodynamic Equation of Seawater 2010 (TEOS-10) has higher accuracy and wider application scope, Compared to the Equation of Seawater 1980 (EOS-80). TEOS-10 allows the calculation of many thermodynamic quantities, such as entropy, enthalpy and heat content, that were not available from EOS-80. Therefore, TEOS-10 will make significant impacts on the development of oceanography. TEOS-10 is compared with EOS-80 based on their applications on climatological averaged data. The difference of the calculated density with these two equations reaches 10-2 kg/m3 in most regions of the world ocean. It is particularly significant in the North Pacific Ocean, North Indian Ocean and also the deep areas in East China Sea and the South China Sea. So in these regions, this difference must be considered in the studies and applications that require high accuracy. The improvements of the new equation are mostly due to a new salinity variable, Absolute Salinity that considers the impacts of all the solutes in seawater, including the neutral solutes, which could make up the deficiency of the Practical Salinity. In order to promote the development of oceanography, the Absolute Salinity and TEOS-10 are recommended to be applied as soon as possible.
Sun Yongming , Shi Jiuxin , Yang Haipeng . The Thermodynamic Equation of Seawater 2010 and Its Comparison with the Equation of Seawater 1980[J]. Advances in Earth Science, 2012 , 27(9) : 1014 -1025 . DOI: 10.11867/j.issn.1001-8166.2012.09.1014
[1]UNESCO. The Practical Salinity Scale 1978 and the International Equation of State of Seawater 1980[R]. UNESCO Technical Papers in Marine Science, 1981:36.
[2]Saunders P.The international temperature Scale of 1990, ITS-90[J]. WOCE New Letter, 1990,5:10.
[3]Yao Yong, Wei Wei, Chen Huaqiu. Study of the ITS-90’s influence on 80 International Equation of Seawater State(IESS-80)[J]. Ocean Technology, 2001, 20（3）:74-78.[姚勇，卫薇， 陈华秋. 90国际温标对80国际海水状态方程影响的研究[J]. 海洋技术，2001,20（3）:74-78.]
[4]Wieser M E.Atomic weights of the elements 2005[J].Pure and Applied Chemistry, 2006, 78(11): 2 051-2 066.
[5]IAPWS. Release on the IAPWS Formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use[C]∥The International Association for the Properties of Water and Steam. Fredericia,1996.
[6]IAPWS. Release on an equation of state for H2O ice Ih[C]∥The International Association for the Properties of Water and Steam. Witney, 2006.
[7]Bao Wanyou, Liu Ximin, Zhang Hao. The narrow and broad senses on the salinity scale[J]. Acta Oceanologica Sinica,2011,23(2):52-56.[包万友，刘喜民，张昊. 盐度定义狭义性与广义性[J]. 海洋学报，2001，23(2):52-56.]
[8]Marcet A. On the specific gravity, and temperature of sea water, in different parts of the ocean, and in particular seas; with some account of their saline contents[J]. Philosophical Transactions of the Royal Society of London, 1819,109:161-208.
[9]Millero F J. Chemical Oceanography[M]. Boca Raton,FL: CRC Taylor and Frances Group, 2006:496.
[10]Millero F J, Feistel R, Wright D G, et al. The composition of Standard Seawater and the definition of the reference-composition salinity scale[J]. Deep-Sea Research, 2008, 55:50-72.
[11]Logan B W, Cebulsk D E. Sedimentary environments of Shark Bay, western Australia[C]∥Carbonate Sedimentation and Environments, Shark Bay, Western Australia, Memoir No.13. The American Association of Petroleum Geologists, 1970:1-37.
[12]Bacon S, Fofonoff N P. Oceanic heat flux calculation[J]. Journal of Atmospheric and Oceanic Technology, 1996, 13:1 327-1 329.
[13]McDougall T J. Potential enthalpy: A conservative oceanic variable for evaluating heat content and heat fluxes[J]. Journal of Physical Oceanography, 2003, 33: 945-963.
[14]Saunders P M. The Bernoulli function and flux of energy in the ocean[J]. Journal of Geophysical Research, 1995,100(C11):22 647-22 648.
[15]Feistel R. A Gibbs function for seawater thermodynamics for -6 to 80 ℃ and salinity upto120 g/kg[J]. Deep-Sea Research I, 2008, 55:1 639-1 671.
[16]Feistel R.A new extended Gibbs thermodynamic potential of seawater[J]. Progress in Oceanography, 2003, 58:43-114.
[17]Feistel R, Wagner W. A new equation of state for H2O ice Ih[J]. Journal of Physical and Chemical Reference Data, 2006, 35(2):1 021-1 047.
[18]Feistel R, Marion G M. A Gibbs-Pitzer function for high-salinity seawater thermodynamics[J]. Progress in Oceanography, 2007, 74:515-539.
[19]McDougall T J, Jackett D R, Millero F J. An algorithm for estimating Absolute Salinity in the global ocean[J]. Ocean Science Discussions, 2009,6:215-242.
[20]IOC, SCOR, IAPSO. The international thermodynamic equation of seawater-2010: Calculation and use of thermodynamic properties[J]. Intergovernmental Oceanographic Commission, Manuals and Guides, 2010,56:196.
[21]McDougall T J, Barker P M. Getting started with TEOS-10 and the Gibbs Seawater (GSW) Oceanographic Toolbox 2010[Z]. May 2011, SCOR/IAPSO WG127, 28pp. http:∥www.TEOS-10.org,2011.
[22]Alberty R A. Use of legendre transforms in chemical thermo-dynamics[J]. Pure and Applied Chemistry, 2001, 73:1 349-1 380.
[23]Millero F J, Feistel R, Wright D G, et al. The composition of standard seawater and the definition of the reference-composition salinity scale[J]. Deep-Sea Research I, 2008, 55:50-72.
[24]Wagner W, Pruβ A. The IAPWS formulation 1995 for the thermodynamic properties of ordinary water substance for general and scientific use[J]. Journal of Physical and Chemical Reference Data, 2002, 31:387-535.
[25]Millero F J. Effects of changes in the composition of seawater on the density-salinity relationship[J]. Deep-Sea Research, 2000, 47:1 583-1 590.
[26]Wright D G, Pawlowicz R, McDougall T J, et al. Absolute Salinity, "Density Salinity" and the Reference Composition Salinity Scale: Present and future use in the seawater standard TEOS-10[J]. Ocean Science,2011, 7：1-26.
[27]Shi Jiuxin, Zhao Jinping, Jiao Yutian,et al. Pacific inflow and its links with abnormal variations in the Arctic Ocean[J]. Chinese Journal of Polar Research, 2004, 16(3):253-260.[史久新，赵进平，矫玉田，等.太平洋入流及其与北冰洋异常变化的联系[J].极地研究，2004, 16(3):253-260.]
[28]Feistel R, Weinreben S, Wolf H, et al. Density and Absolute Salinity of the Baltic Sea 2006-2009[J]. Ocean Science, 2010, 6:3-24.
[29]Millero F J. Freezing point of seawater[J].UNESCO Technical Papers in Marine Science, 1978, 28:35.
[30]Shi J, Cheng Y, Jiao Y, et al. Supercooled water in austral summer in Prydz Bay, Antarctica[J].Chinese Journal of Oceanology and Limnology, 2011,29(2):427-437.
[31]Jackett D R, McDougall T J, Feistel R, et al. Algorithms for density, potential temperature, conservative temperature, and the freezing temperature of seawater[J].Journal of Atmospheric and Oceanic Technology,2006, 23:1 709.
[32]Marion G M, Millero F J, Feistel R. Precipitation of solid phase calcium carbonates and their effect on application of seawater SA-T-P models [J]. Ocean Science, 2009，5:285-291.
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