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  • Bornträger  (5)
  • Oxford [u.a.] : Pergamon  (1)
  • 1
    Monograph available for loan
    Monograph available for loan
    Regional oceanography : an introduction (1994)
    Oxford [u.a.] : Pergamon
    Details Availability
    Call number: PIK N 454-16-90124
    Description / Table of Contents: Ohne Kurzreferat
    Type of Medium: Monograph available for loan
    Pages: VII, 422 S. , Ill., graph. Darst., Kt
    Edition: 1. ed
    ISBN: 0080410219 (Gewebe) , 0080410200 (kart.)
    URL: http://www.es.flinders.edu.au/~mattom/regoc/pdfversion.html
    URL: http://www.gbv.de/dms/bowker/toc/9780080410203.pdf
    Language: English
    Location: A 18 - must be ordered
    Branch Library: PIK Library
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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
    Details
    Publication Date: 2022-06-16
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    An investigation into the occurrence and development of cold water patches in the upwelling region off NW Africa (Roßbreiten-Expedition 1970) (1973)
    Bornträger
    Details
    Publication Date: 2022-06-22
    Type: Article , PeerReviewed
    Format: text
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  • 4
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    Bericht über den Verlauf der Expedition "Auftrieb '72" : 26. Reise von F.S. "Meteor" vom 19. Januar bis 29. März 1972 (1975)
    Bornträger
    Details
    Publication Date: 2022-06-22
    Description: The expedition "Auftrieb '72" was conducted in the NW African Upwelling Region off the Banc d' Arguin and included two geological profiles off Cap Blanc and off Villa Cisneros. R.V. "Meteor" and R.V. "Planet", the research plane "Canberra" and the tourist vessel M.S. "Regina Maris" participated in the expedition. Several components added up to a coordinated programme of different disciplines: Current meter moorings, large-scale oceanography and intensive studies of frontal zones were the task of R.V. "Planet". Medium-scale oceanography, chemistry and various disciplines of marine biology were performed with R.V. "Meteor", while the airplane and M.S. "Regina Maris" supplied background oceanographic information for the whole programme. The work done with R.V. "Meteor" is reported here. lt has been organised in three sections: Cruise section I. Nutrient dynamics in upwelling water bodies, in continuation of the work done during the "Roßbreiten-Expedition 1970". Cruise section II. Circulation in an upwelling system, including direct measurements of the vertical velocity; mixing processes in an upwelling system. Cruise section III. Sediment and benthos in areas of strong and weak upwelling. The approach to the study of these processes varied according to the problem. During cruise section I a number of drift experiments similar to the experiment conducted during the "Roßbreiten-Expedition 1970" was performed, consisting of a regular station programme at a freely drifting buoy which served for marking a patch of upwelling water. Cruise section II consisted of repeated sections in the vicinity of the vertical current meters and the current meter moorings. Cruise section III concentrated on two profiles perpendicular to the coast off Cap Blanc and Villa Cisneros.
    Type: Article , PeerReviewed
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  • 5
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    Evidence of increased turbulent mixing in the coastal jet of the NW-African upwelling region (1976)
    Bornträger
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    Publication Date: 2022-06-22
    Description: Temperature data are presented which were obtained by means of a towed thermistor cable during the expedition "Auftrieb '72" in the immediate vicinity of the continental slope within the NW African upwelling region. While most of the data have been sampled on the offshore side of the upwelling front, the front is crossed on a few occasions, and some data cover the area of the upwelling coastal jet. They reveal a very deep homogeneous surface ]ayer within the coastal jet, indicative for increased turbulent mixing. These conclusions from the temperature sections are confirmed by the temperature and salinity data from CTD casts made in the same area at the same time. In spite of the complicated hydrography of the area and the large number of water masses involved, the existence of a zone of increased turbulent mixing within the jet is indicated in the data.
    Type: Article , PeerReviewed
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  • 6
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    Three dimensional variability of water masses and currents in the Canary Current upwelling region (1980)
    Bornträger
    Details
    Publication Date: 2022-06-24
    Description: "Auftrieb 75" was a joint cruise of R.V. "Meteor" and R.R.S. "Discovery" performed in the area 21-26° N off the northwest African coast during January-March, 1975. Current meter observations from six moorings and CTD/STD observations from three repeatedly covered sections of the cruise are analysed in order to describe the distribution of the water masses and its variability with the changes in the current system. The Canary Current is seen to pass through the northwestern corner of the expedition area, carrying with it a geostrophic eddy with a period in excess of 30 days. The eddy is probably another example of the type generally found in the open ocean circulation. Further south, offshore currents display large variations in strength and direction with a typical time scale of 10-14 days which are believed to reflect largescale mixing processes along the boundary of the Canary Current and the poleward flow of the coastal region, involving North Atlantic Central Water (NACW) and South Atlantic Central Water (SACW). The coastal upwelling undercurrent has been observed along the shelf edge but undergoes large variations in response to the wind and to variations in the horizontal divergence of the offshore currents. On the shelf the circulation responds to the local longshore wind to some extent but is also strongly affected by variations of the currents at the shelf edge. The distribution of water masses at intermediate depth ( 100-800 m) is analysed quantitatively based on the assumption that mixing between NACW and SACW is effective along surfaces of constant density only. lt is shown that most intense mixing occurs at about 22-23° N and is still very important further south. At 25-26° N SACW has been absorbed into the surrounding NACW water mass to a high degree, even in the undercurrent. Isolated bodies of water are found in the southern part of the expedition area, some of which are carried north in the undercurrent. The large variability in the water mass distribution at the source level of the upwelling probably has important consequences for the variations in the efficiency of biological production of the upwelling region.
    Type: Article , PeerReviewed
    Format: text
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