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  • 1
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    In memoriam Günter Dietrich 1911-1972 (1973)
    Bornträger
    In:  Meteor Forschungsergebnisse: Reihe A, Allgemeines, Physik und Chemie des Meeres, 12 . V-X.
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    Publication Date: 2017-01-23
    Type: Article , PeerReviewed
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  • 2
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    Schwankungen von Schichtung und Strömung im westafrikanischen Auftriebsgebiet während der "Deutschen Nordatlantischen Expedition" 1937 (1970)
    Bornträger
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    Publication Date: 2022-06-16
    Type: Article , PeerReviewed
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  • 3
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    Reisebericht der Atlantischen Expedition 1965 (IQSY) mit dem Forschungsschiff "Meteor" (1970)
    Bornträger
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    Publication Date: 2022-06-17
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  • 4
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    Hydrographische und chemische Beobachtungen auf einer Ankerstation im östlichen Nordatlantischen Ozean (1970)
    Bornträger
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    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.
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  • 5
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    Physikalische und chemische Daten nach Beobachtungen des Forschungsschiffes "Meteor" im Persischen Golf 1965 (1970)
    Bornträger
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    Publication Date: 2022-06-17
    Description: The following tables show physical and chemical data observed by the "Meteor" in the Persian Gulf and the Strait of Hormus. This study was performed in accordance with the general programme of the International Indian Ocean Expedition (IIOE) during the period from March 25 th until April 16th, 1965. The water temperature was measured by reversing thermometers; in most cases two instruments were used simultaneously. The absolute mean temperature difference of this double measurement is 0.0153 °C. The salinity was determined both by salinometer and by titration. In this case the absolute mean difference amounts to 0.0174‰. The computations of the density, the specific volume anomaly, the dynamic depth anomaly, the sound velocity and the interpolation for standard depths were carried out by the National Oceanographic Data Center (NODC), Washington.
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  • 6
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    Einige Beobachtungen über Lösungsvorgänge am Boden des Ozeans (1970)
    Bornträger
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    Publication Date: 2022-06-17
    Description: Changes in the dissolved oxygen content, the alkalinity, and the pH in sea water near the ocean floor are interpreted in terms of chemical and biochemical processes at the sediment water interface. A simple model provides a plausible explanation of the observed phenomena. Special emphasis is given to the importance of borate corrections in the calculation of the solution effects of calcium carbonate.
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  • 7
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    Die Vertikalgeschwindigkeit von Bewegungen mit Gezeitenperiode im Gebiet der Großen Meteorbank (1971)
    Bornträger
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    Publication Date: 2022-06-17
    Description: Continuous Bathysonde profiles of temperature versus pressure were used to follow the depths of isotherms at a deep sea anchor station northwest of the Great Meteor Seamount (30 ° N, 28 ° W) from 19th to 27th of April 1967. Assuming temperature to be a conservative parameter, vertical velocities can be computed from the vertical displacements of isotherms, according to equations (1) or (7), respectively. Several advective terms of higher order, however, seem to be large compared to lower order terms (see equ. (7) and table 1). In addition, advective velocities are only known approximately for the period of the measurements. Therefore the total vertical velocity for each depth could not be determined. However, it can be assumed that vertical velocities of semi-diurnal tidal period are large compared, to vertical motions of other frequencies (see fig. 2). The vertical velocity of the semi-diurnal tidal motion can therefore be computed from equ. (10) (table 2). A subsequent approximation of the observed distribution of the vertical velocity component by eigenfunctions reveals a reasonable description of the baroclinic semi-diurnal tide by internal gravity wave modes of the order 1-4 (see fig. 5).
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  • 8
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    Die zeitliche Veränderlichkeit der Temperatur der ozeanischen Deckschicht im Gebiet der Großen Meteorbank (1971)
    Bornträger
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    Publication Date: 2022-06-17
    Description: Based on measurements during the "Atlantic Seamount Cruises 1967" with the German R. V. Meteor, (see Cwss et al., 1969; HORN et al., 1971), the fluctuations of temperature in the upper 275 meters are investigated. The analysis of 67 time-series yields the following : 1. Within the period range from 124 hours to 10 minutes fundamental oscillations and their harmonics occur permanently with relatively high amplitudes. These oscillations could be attributed to the diurnal (K1) and semidiurnal (M2) surface- and internal tidal waves as well as to their harmonics. It ought to be mentioned that in the surveyed area the K1-tide and the inertial wave have the same periods and could not be separated by spectrum analysis. 2. Interactions between the K1- or M2-waves and their harmonics by single superposition are shown in the observed periods. These two facts possibly can be explained by the perturbative influence of the Great Meteor Seamount on long wave motions. 3. Special investigations of the short period range lead to significant oscillations with periods between 15 and 40 minutes, which correspond to the Brunt-Väisälä-frequency calculated from the mean density distribution. 4. The diurnal variation of tempernture at the sea surface has a mean amplitude of 0.3 °C and a penetration depth of about 55 m. The mean vertical eddy conductivity amounts to 260 g cm-1 sec-1.
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  • 9
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    Schichtungs- und Strömungsmessungen im Bereich der Großen Meteorbank (1971)
    Bornträger
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    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).
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  • 10
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    Mittelmeerfahrten 1969 (Nr. 17) und 1971 (Nr. 22) des Forschungsschiffes "Meteor" (1972)
    Bornträger
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    Publication Date: 2022-06-17
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