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  • 1
    Book
    Book
    Der Einfluss der Wärmebilanz auf die Struktur der saisonalen Grenzschicht : = The role of the heat budget in the seasonal boundary layer (1987)
    Kiel : Inst. f. Meereskunde, Abt. Regionale Ozeanographie
    Details Availability
    Keywords: Buch Book ; Bericht Hochschulschrift ; Serienstueck ; Einteiler ; Dissertation ; Report ; Hochschulschrift ; Bericht
    Type of Medium: Book
    Pages: X, 161, 8 S. , graph. Darst., Kt.
    Series Statement: Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität, Kiel 171
    Language: German , English , English
    Note: X [ 10 ] zehn, 161 einhunderteinundsechzig, 8 acht Seiten : graphische grafische Darsteellung Darstellungen , Zugl.: Kiel, Univ., Diss. : 1987 , Literaturverz. S. 152 - 161 , Mit engl. Zsfassung.
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  • 2
    Online Resource
    Online Resource
    Der Einfluß der Wärmebildung auf die Struktur der saisonalen Grenzschicht (1986)
    Kiel
    Details Availability
    Keywords: Hochschulschrift
    Type of Medium: Online Resource
    Pages: Online-Ressource (169 Seiten = 7 MB) , Graphen, Karten
    URL: https://oceanrep.geomar.de/22123/
    Language: German
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  • 3
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    The response of the upper ocean to solar heating. I: The mixed layer (1986)
    Royal Meteorological Society
    In:  Quarterly Journal of the Royal Meteorological Society, 112 (471). pp. 1-27.
    Details
    Publication Date: 2019-01-21
    Description: The results of two earlier papers on convection in the mixed layer and on the solar heating profile are here introduced into a one-dimensional model in order to investigate the following consequences of the daily cycle of solar heating in the upper ocean: 1. the daytime convection depth becomes less than the turbocline depth; 2. the convective power supply to turbulence in the mixed layer is reduced; 3. the mixed layer below the convection layer becomes stably stratified; 4. the depth of the turbocline is reduced, leaving a diurnal thermocline between it and the top of the seasonal thermocline; 5. the heat content and potential energy of the diurnal and seasonal thermoclines are increased, slowing down the subsequent nocturnal descent of the turbocline. These diurnal changes are illustrated by integrating a one-dimensional model forced by the astronomical cycle of solar heating and seasonal variation of surface meteorology derived from Bunker's climatology. The model is integrated for 18 months to show the seasonal modulation of the diurnal cycle. Nocturnal convection plays a dominant role. The convection depth closely follows the thermal compensation depth during the day when they are less than the turbocline depth. Integrating the model with a 24-hour time step leads to large errors in the seasonal variation of mixed layer temperature and depth, and in the source term of isopycnic potential vorticity. The errors are reduced by using two time steps per day, one for the daytime when convection is quenched, the other for the night when it is active. A novel parametrization based on tuning the daily equivalent solar elevation to surface temperature further reduces the error. This parametrization is used to investigate the sensitivity of the seasonal cycles of mixed layer depth and temperature to: (1) seasonality in the surface fluxes; (2) systematic changes in the net annual solar heating; (3) random changes in the seasonal cycles of solar heating induced (i) monthly and (ii) daily. The sensitivity to uncertainty in seawater turbidity is investigated in the same way. The profile of isopycnic potential vorticity subducted into the thermocline depends on the vernal correlation of mixed layer depth and density, so gyre circulation is sensitive to solar heating in spring.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/qj.49711247102
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Mixed layer and Ekman current response to solar heating (1985)
    Reidel
    In:  In: The oceanic surface: wave Breaking, Turbulent Mixing and radio Probing. , ed. by Toba, Y. and Mitsuvasu, H. Reidel, Dordrecht, pp. 487-507.
    Details
    Publication Date: 2012-06-18
    Type: Book chapter , NonPeerReviewed
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    OceanRep: Book chapter
  • 5
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    A Lagrangian mixed layer model of Atlantic 18 C water formation (1986)
    Nature Publishing Group
    In:  Nature, 319 . pp. 574-576.
    Details
    Publication Date: 2019-01-21
    Description: One of the most striking features of the upper North Atlantic Ocean is an extensive layer of water with temperature close to 18°C and salinity close to 36.5‰, (ref. 1). This 18°C water is formed by winter convection in the Sargasso sea2,3, but aspects of the annual rate of 18°C water formation remain obscure4. We have simulated this water mass formation by integrating a one-dimensional model along a 4-yr trajectory of a water column circulating around the Sargasso Sea. Winter convection is deep (≥200 m) in regions where the ocean suffers a net annual heat loss to the atmosphere, and shallow (≤lOOm) where the ocean gains heat each year. The origin of the thermostad (nearly isothermal layer) is a thick layer of nearly homogeneous water subducted beneath the seasonal boundary layer in the year that the water column passes through the line dividing annual cooling from annual heating. We estimate the annual production of 18°C water to be 446,000 km3 yr−1. Downstream, more stratified central water is formed each year at a rate that depends more on Ekman pumping (wind-forced convergence) than on the decreasing depth of winter convection
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1038/319574a0
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Der Einfluß der Wärmebildung auf die Struktur der saisonalen Grenzschicht (1987)
    In:  (PhD/ Doctoral thesis), Christian-Albrechts-Universität Kiel, Kiel, Germany, 161 pp . Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel, 171 . DOI 10.3289/ifm_ber_171 〈http://dx.doi.org/10.3289/ifm_ber_171〉.
    Details
    Publication Date: 2013-10-16
    Type: Thesis , NonPeerReviewed
    Format: text
    DOI: 10.3289/ifm_ber_171
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    OceanRep: Thesis - not published by a publisher
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