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  • 1
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    Unknown
    Hydrographische und chemische Beobachtungen auf einer Ankerstation im östlichen Nordatlantischen Ozean (1970)
    Bornträger
    Details
    Publication Date: 2022-06-17
    Description: Serial observations of temperature, salinity, oxygen, alkalinity and pH are presented. They were carried out during an anchor station of R. V. "Meteor" west of Cape Sao Vincente (Portugal) in the area of the maximum Mediterranean water outflow, which follows the continental slope off Portugal. Two observational results are pointed out: The Mediterranean water masses spread out into the Atlantic Ocean, consisting of two distinct layers at depths of 700 m (T = 12.0 °C, S = 36.15‰) and 1250 m (T = 11.3 °C, S = 36.40‰). The salinity proved to be the most significant indicatot of the observed stratification (see figs. 2, 3, 4 and 5). The values of dissolved oxygen content, alkalinity and pH in the very near bottom layer (1 m above the bottom at depths of 3250 m) are different from the values at depths of 15 m to 1000 m above the bottom (see figs. 11, 12 and table 1). As this phenomenon is not observed for the salinity, the changes may be interpreted in terms of chemical and biological processes at the sediment - water interface.
    Type: Article , PeerReviewed
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  • 2
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    Schichtungs- und Strömungsmessungen im Bereich der Großen Meteorbank (1971)
    Bornträger
    Details
    Publication Date: 2022-06-17
    Description: Data obtained during the "Atlantic Seamounts Cruises 1967" with the German R.V. "Meteor" in the area of the Great Meteor Seamount (30 ° N, 28 ° W) are presented graphically. Sections of temperature, salinity, oxygen, pH and alkalinity (figs. 2-5) generally show horizontal homogeneity, which is obviously disturbed around the top of the seamount. This is conformed in greater detail by the results of two bathy thermograph-sections (figs. 6, 7). The time dependence of variations in stratification and currents is presented in figs. 8-10 and 12-17. They clearly indicate the presence of tidal motions, which are amplified in the area above the plateauby a factor of 4. The marked differences in the vertical amplitude distribution suggest the occurrence of internal (tidal) waves. Figs. 18 and 19 graph the residual currents, which show significant deviations from a uniform directional behaviour, especially in the bottom layer on top of the seamount. Various aspects of the data will be treated by HoRN (1971), HUSSELS (1971) and MEINCKE (1971).
    Type: Article , PeerReviewed
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  • 3
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    Some current observations near the continental slope off Portugal (1975)
    Bornträger
    Details
    Publication Date: 2022-06-22
    Description: Some current meter data obtained from a mooring at 2450 m water depth near the continental slope off Portugal are presented. The mean currents at five levels with observations are northward. Mean speeds in the core of the Mediterranean Water exceed speeds at shallower levels by 2 to 3 cm/sec, indicating advection connected to this specific water mass. The current variability is dominated by semi-diurnal tidal components. Normal mode analysis reveals a predominant mode of order 2, representing 48% of the total kinetic tidal energy. Results for the barotropic tidal component are in good agreement with earlier predictions for this area. The motion at higher frequencies ω in the internal gravity wave band can be well described by a ω-2 power law for the energy density spectrum. This result is consistent with earlier observations in other parts of the ocean.
    Type: Article , PeerReviewed
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  • 4
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    High frequency velocity fluctuations near the bottom over the continental slope (1978)
    Bornträger
    Details
    Publication Date: 2022-06-23
    Description: Records of currents and temperature on the upper edge of the continental slope off Sierra Leone show a significant energy peak between 0.3 and 2 cph in the bottom near layer. The fluctuations of temperature and velocity are interpreted as internal waves over a critical bottom slope. Since they seem to receive their energy mainly from the barotropic tide, the phenomenon is of interest in the dissipation cascade of tidal waves. The high frequency current amplitudes are occasionally strong enough to affect sediment deposition and related benthic processes. Inspection of current meter records from other regions of the NW-African continental slope reveal the similar effect of intensified bottom current fluctuations.
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  • 5
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    A compendium of the oceanographic data obtained during "FGGE-Equator '79", cruise no. 51 of R.V. "Meteor" (1984)
    Bornträger
    Details
    Publication Date: 2022-06-29
    Description: From 27 Janua1y to 23 June 1979 R. V. "Meteor" surveyed the central equatorial Atlantic on a section along 22° W from 3° N to 2° S. During the observation period, a hydrographic section down to 600 m was repeated ten times with a continuous "Howaldt-Bathysonde" CTD and a rosette sampler. The station distance was 10 to 15 nm. The water samples were used to recalibrate salinity and to determine oxygen, nutrients and chlorophyll a. An undulating CTD system ("Delphin") was towed on 11 sections. A profiling distance of one to two nautical miles and a profile depth of 90 m was obtained. Five current meter arrays were moored along 22° W between 3° N and 1° S from January to March 1979. In May and June two moorings were installed at 2° N and at the equator. On the buoys measurements of wind speed and direction were obtained. At 43 stations a wire-guided Aanderaa profiling current meter was successfully lowered. Drifting buoy experiments were repeated three times with clusters of 5 to 10 buoys. A fourth experiment took place in 1978 in the Gulf of Guinea. On the way from and to port XBT sections were carried out. The data sets obtained by these instruments are presented in this data report.
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  • 6
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    Nordostatlantik '83 - Data Report (1984)
    PANGAEA
    In:  EPIC3Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel, Bremerhaven, PANGAEA, 134, 64 p.
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 7
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    METEOR Cruise overview M31 (1973)
    PANGAEA
    In:  EPIC3Deutsches Hydrographisches Institut, Hamburg, Bremerhaven, PANGAEA
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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