| Review of Global Ocean Intermediate Water Masses： 1. Part A, the Neutral Density Surface （the ＇McDougall Surface＇ ） as a Study Frame for Water-Mass Analysis |
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| 作者姓名： | Yuzhu You |
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| 作者单位： | [1]The University of Sydney Institute of Marine Science （USIMS）, Building H11, University of Sydney, NSW 2006, Australia [2]Physical Oceanography Laboratory, Ocean University of China, Qingdao 266003, P.R. China |
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| 摘 要： | This review article commences with a comprehensive historical review of the evolution and application of various density surfaces in atmospheric and oceanic studies. The background provides a basis for the birth of the neutral density idea. Attention is paid to the development of the neutral density surface concept from the nonlinearity of the equation of state of seawater. The definition and properties of neutral density surface are described in detail as developed from the equations of state of seawater and the buoyancy frequency when the squared buoyancy frequency N2 is zero, a neutral state of stability. In order to apply the neutral density surface to intermediate water-mass analysis, this review also describes in detail its practical oceanographic application. The mapping technique is focused for the first time on applying regularly gridded data in this review. It is reviewed how a backbone and ribs framework was designed to flesh out from a reference cast and first mapped the global neutral surfaces in the world＇s oceans. Several mapped neutral density surfaces are presented as examples for each world ocean. The water-mass property is analyzed in each ocean at mid-depth. The characteristics of neutral density surfaces are compared with those of potential density surfaces.
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| 关 键 词： | 海水 浮性 麦克道尔 深度 |
| 收稿时间： | 2005-09-28 |
| 修稿时间： | 17 April 2006 |
Review of global ocean intermediate water masses: 1. part A, the neutral density surface (the ‘mcdougall surface’) as a study frame for water-mass analysis |
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| Yuzhu You.Review of global ocean intermediate water masses: 1. part A, the neutral density surface (the ‘mcdougall surface’) as a study frame for water-mass analysis[J].Journal of Ocean University of China,2006,5(3):187-199. |
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| Authors: | Yuzhu You |
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| Institution: | (1) The University of Sydney Instute of Marine Science (USIMS), University of Sydney, Building H11, 2006, NSW, Australia;(2) Physical Oceanography Laboratory, Ocean University, of China, 266003 Qingdao, P.R. China |
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| Abstract: | This review article commences with a comprehensive historical review of the evolution and application of various density surfaces
in atmospheric and oceanic studies. The background provides a basis for the birth of the neutral density idea. Attention is
paid to the development of the neutral density surface concept from the nonlinearity of the equation of state of seawater.
The definition and properties of neutral density surface are described in detail as developed from the equations of state
of seawater and the buoyancy frequency when the squared buoyancy frequency N
2 is zero, a neutral state of stability. In order to apply the neutral density surface to intermediate water-mass analysis,
this review also describes in detail its practical oceanographic application. The mapping technique is focused for the first
time on applying regularly gridded data in this review. It is reviewed how a backbone and ribs framework was designed to flesh
out from a reference cast and first mapped the global neutral surfaces in the world's oceans. Several mapped neutral density
surfaces are presented as examples for each world ocean. The water-mass property is analyzed in each ocean at mid-depth. The
characteristics of neutral density surfaces are compared with those of potential density surfaces. |
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| Keywords: | neutral density surface potential density surface equation of state of seawater McDougall surface watermass analysis global ocean mapping of neutral density surfaces |
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