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  • Elsevier  (3)
  • Berlin, Heidelberg :Springer Berlin / Heidelberg,  (1)
  • DWD  (1)
  • Institut für Meereskunde  (1)
  • Springer  (1)
  • Springer Verlag Berlin  (1)
  • 2010-2014  (2)
  • 2000-2004  (3)
  • 1995-1999  (3)
  • 1970-1974
Publisher
Language
Years
Year
  • 1
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Climatic changes-Congresses. ; Electronic books.
    Description / Table of Contents: Proceedings of the NATO Advanced Study Institute "Decadal Climate Variability:Dynamics and Predictability", held at Les Houches, France, February 13-24, 1995.
    Type of Medium: Online Resource
    Pages: 1 online resource (498 pages)
    Edition: 1st ed.
    ISBN: 9783662032916
    Series Statement: Nato asi Subseries I: Series ; v.44
    DDC: 551.6
    Language: English
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  • 2
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    Elsevier
    In:  Deep Sea Research Part II: Topical Studies in Oceanography, 46 . pp. 33-54.
    Publication Date: 2019-09-23
    Description: The possibilities of defining and computing an approximately neutral density variable are reexamined in this paper. There are three desirable properties that a neutral density variable should possess. Firstly, the isosurfaces of this variable should coincide with (approximately) neutral surfaces. This would facilitate the analysis of hydrographic data on the most appropriate mixing and spreading surfaces. Secondly, the horizontal gradients of the neutral density should agree with the gradients of the in situ density, and thirdly the vertical gradient of the neutral density variable should be proportional to the static stability of the water column. A density variable that approximates the latter two properties can be used in ocean circulation models based on layer coordinates, and would reduce substantial errors in present isopycnal models due to the use of a potential density variable. No variable can possess all the three properties simultaneously. The variable γn introduced by Jackett and McDougall (1997, J. Phys. Oceanogr. 27, 237–263) satisfies the first of the properties exactly but is not designed for the use in models. Based on climatological data in the North Atlantic, an alternative neutral density variable ν̃(S, Θ) is defined, which is shown to approximate the two gradient criteria much better than any potential density. We suggest that this neutral density variable may be useful in isopycnal ocean models as an alternative to potential density, since it could significantly reduce errors in thermal wind relation and vertical stability
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    DWD
    In:  Promet - Meteorologische Fortbildung, 29 (1-4). pp. 15-28.
    Publication Date: 2016-10-04
    Type: Article , NonPeerReviewed
    Format: text
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  • 4
    Publication Date: 2019-09-23
    Type: Report , NonPeerReviewed
    Format: text
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  • 5
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    Springer
    In:  Springer, Heidelberg, 704 pp. ISBN 978-3-642-23449-1
    Publication Date: 2012-06-12
    Type: Book , NonPeerReviewed
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  • 6
    Publication Date: 2016-10-07
    Description: A systematic intercomparison of three realistic eddy-permitting models of the North Atlantic circulation has been performed. The models use different concepts for the discretization of the vertical coordinate, namely geopotential levels, isopycnal layers, terrain-following (sigma) coordinates, respectively. Although these models were integrated under nearly identical conditions, the resulting large-scale model circulations show substantial differences. The results demonstrate that the large-scale thermohaline circulation is very sensitive to the model representation of certain localised processes, in particular to the amount and water mass properties of the overflow across the Greenland–Scotland region, to the amount of mixing within a few hundred kilometers south of the sills, and to several other processes at small or sub-grid scales. The different behaviour of the three models can to a large extent be explained as a consequence of the different model representation of these processes.
    Type: Article , PeerReviewed
    Format: text
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  • 7
    Publication Date: 2019-09-23
    Description: This paper shows that the mean flow of an eddy-permitting model can be altered by assimilation of surface height variability, providing that information about the mean sea surface is included, using an adaption of a statistical–dynamical method devised by Oschlies and Willebrand. We show that for a restricted depth range (about 1000 m), dynamical knowledge can make up for the null space present in surface data whose temporal extent may be too short to distinguish between vertical modes. The lack of an accurate geoid has meant that most assimilation methods, while representing variability well, have been unable to modify the mean flow to any extent. However, we show that by including several approximate forms for the mean sea surface, the mean interior flow in the upper kilometer can be rapidly adjusted towards reality by the assimilation, with the location of major current systems moved by hundreds of kilometers.
    Type: Article , PeerReviewed
    Format: text
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  • 8
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    Springer Verlag Berlin
    In:  EPIC3Berlin, Springer Verlag Berlin, 704 p., ISBN: 978-3-642-23449-1
    Publication Date: 2019-07-16
    Description: Ocean Dynamics’ is a concise introduction to the fundamentals of fluid mechanics, non-equilibrium thermodynamics and the common approximations for geophysical fluid dynamics, presenting a comprehensive approach to large-scale ocean circulation theory. The book is written on the physical and mathematical level of graduate students in theoretical courses of physical oceanography, meteorology and environmental physics. An extensive bibliography and index, extensive side notes and recommendations for further reading, and a comparison with the specific atmospheric physics where applicable, makes this volume also a useful reading for researchers. Each of the four parts of the book – fundamental laws, common approximations, ocean waves, oceanic turbulence and eddies, and selected aspects of ocean dynamics – starts with elementary considerations, blending then classical topics with more advanced developments of fluid mechanics and theoretical oceanography. The last part covers the theory of the global wind-driven circulation in homogeneous and stratified regimes, the circulation and overturning in the Southern Ocean, and the global meridional overturning and thermohaline-driven circulation. Emphasis is placed on simple physical models rather than access to extensive numerical results, enabling students to understand and reproduce the complex theory mostly by analytical means. All equations and models are derived in detail and illustrated by numerous figures. The appendix provides short excursions into the mathematical background, such as vector analysis, statistics, and differential equations
    Repository Name: EPIC Alfred Wegener Institut
    Type: Book , peerRev
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