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  • AGU (American Geophysical Union)  (3)
  • Schweizerbart  (1)
  • 1
    Publication Date: 1970-01-01
    Print ISSN: 0012-0189
    Topics: Geosciences
    Published by Schweizerbart
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  • 2
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    AGU (American Geophysical Union) | Wiley
    In:  In: The Mediterranean Sea. , ed. by Borzelli, G. L. E., Gačić, M., Lionello, P. and Malanotte‐Rizzoli, P. Geophysical Monograph Series, 202 . AGU (American Geophysical Union), Wiley, Washington, pp. 75-83.
    Publication Date: 2020-08-03
    Description: The eastern Mediterranean transient (EMT) was caused by a combination of high‐salinity waters intruding into the Aegean Sea and the two particularly strong winters of 1991–1992 and 1992–1993. The approach in this chapter is to search for specific signatures in the historic hydrographic observations, which date back to 1910. To deal with the problem that up into the 1950s the data not only are of limited precision but also have gaps of about 20 years, it is advantageous to consider the fact that the evolution of the actual EMT is rather well documented over a similar time span. The chapter begins by outlining the characteristics of the current EMT. Thereafter, a selection of suitable hydrographic observations among the available historic data is provided to compare these with signatures expected from the evolution of the actual EMT.
    Type: Book chapter , PeerReviewed
    Format: text
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  • 3
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    AGU (American Geophysical Union) | Wiley
    In:  In: The Mediterranean Sea: Temporal variability and spatial patterns. Geophysical Monograph Series, 202 . AGU (American Geophysical Union), Wiley, Washington, USA, pp. 75-83.
    Publication Date: 2015-09-28
    Type: Book chapter , PeerReviewed
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  • 4
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    AGU (American Geophysical Union)
    In:  Journal of Geophysical Research: Oceans, 101 (C7). pp. 16455-16464.
    Publication Date: 2018-04-30
    Description: We study the temporal evolution of concentrations of the chlorofluorocarbons CFC 11 and CFC 12 in the ocean, under the assumption of circulation and mixing being invariant in time. This allows us to define a time‐invariant age distribution for a given point in the ocean, where the age is defined as time since the last contact with the atmosphere occurred. This concept is evaluated for a number of fundamental situations. We deduce a tendency for low CFC 11 and CFC 12 concentrations in advective regimes to increase exponentially in time and for concentrations near to a solubility equilibrium with atmospheric concentrations to increase rather more linearly. The apparent saturations, i.e., the ratios of interior to mixed‐layer CFC concentrations, increase monotonically in time, typical rates being 5–10% per decade. The theoretical results are compatible with time trends found in repeated CFC observations in the ocean. Diagrams on the temporal evolution for different age distributions are presented for the period 1970–2000, which can serve as a general orientation. The diagrams furthermore can provide time corrections for quasi‐synoptic evaluation of CFC observations taken over an extended period of time and assist in constructing time‐dependent CFC boundary conditions for numerical models of ocean circulation.
    Type: Article , PeerReviewed
    Format: text
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