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  • 2020-2024  (2)
  • 2010-2014  (17)
  • 2000-2004  (49)
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  • 1
    Online Resource
    Online Resource
    C org-reiche Sedimenthorizonte der Alboran See (ODP Site 976, westlichstes Mittelmeer) : Rekonstruktion der Ablagerungsbedingungen nach hochauflösenden Profilen stabiler Sauerstoff- und Kohlenstoffisotope und der Häufigkeitsverteilung benthischer Foraminiferen (Teil 2 : Laborarbeit) (2000)
    Kiel
    Details Availability
    Keywords: Hochschulschrift ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (94 Seiten = 6 MB) , Graphen, Karte
    Edition: Online-Ausgabe 2023
    URL: https://oceanrep.geomar.de/id/eprint/59453/
    Language: German
    Note: Zusammenfassung in deutscher und englischer Sprache
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  • 2
    Electronic Resource
    Electronic Resource
    Global change Monsoon linkages (2003)
    [s.l.] : Nature Publishing Group
    Nature 421 (2003), S. 324-325 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The monsoon is the main determinant of environmental conditions over much of Asia, and so affects the most densely populated region on Earth. Differential heating of the north Indian Ocean and the northwest Pacific, and of the Asian land-mass, cause the seasonal reversal of monsoon winds. In ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/421324a
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    Paper (German National Licenses)
    Fulltext
  • 3
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    Global change: Monsoon linkages (2003)
    Nature Publishing Group
    In:  Nature, 421 (6921). pp. 324-325.
    Details
    Publication Date: 2016-07-19
    Description: An excellent sediment record from the Arabian Sea traces recent patterns in the activity of the Asian monsoon. It reveals both variability in monsoon strength and links with climatic events elsewhere. The monsoon is the main determinant of environmental conditions over much of Asia, and so affects the most densely populated region on Earth. Differential heating of the north Indian Ocean and the northwest Pacific, and of the Asian land-mass, cause the seasonal reversal of monsoon winds. In summer, these winds blow northwards over the northern Indian Ocean, carrying huge amounts of moisture over the neighbouring land. The ensuing heavy rainfall can have devastating consequences for human life and livelihood. Conversely, agriculture in Asia depends on monsoon rains; and the seasonal upwelling of nutrient-laden subsurface waters, driven by monsoon winds, is essential to the success of coastal fisheries.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1038/421324a
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 4
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    Suborbital intermediate water variability inferred from paired benthic foraminiferal Cd/Ca and δ13C in the tropical West Atlantic and linking with North Atlantic climates (2002)
    Elsevier
    In:  Earth and Planetary Science Letters, 200 (1-2). pp. 191-205.
    Details
    Publication Date: 2016-07-15
    Description: Paired benthic Cd/Ca and δ13C records have been generated along core M35003 in the western tropical Atlantic. Decreased glacial water column dissolved cadmium (Cdw) and increased benthic δ13C indicate enhanced ventilation with nutrient-deplete intermediate waters, in line with similar inferences from other North Atlantic mid-depth records. An abrupt early deglacial δ13C collapse that is associated with a marked positive Cdw anomaly indicates a transient collapse of mid-depth ventilation from North Atlantic sources, conceivably in conjunction with the H1 meltwater anomaly. The Cdw record displays fine-scale fluctuations that mimic the Greenland Dansgaard/Oeschger (D/O) cycles and show decreased Cdw during stadials. This pattern is opposite to Cdw variations in a deep water record from Bermuda Rise that display increased Cdw concentrations during stadials. The divergent pattern between mid-depth and deep water Cdw records indicates millennial-scale switches between deep and shallow convection in the glacial North Atlantic, at the pace of the D/O climatic cycles. Several high-amplitude anomalies occur in the Cdw record that reach levels similar to those observed today in the North Pacific. While a substantial nutrient increase in the mid-depth North Atlantic cannot be ruled out during these events, changes of pore water chemistry and Cd/P fractionation during biological uptake offer alternative scenarios to explain the peak Cdw maxima.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/S0012-821X(02)00613-1
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 5
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    Quantitative estimate of the paleo-Agulhas leakage (2014)
    AGU (American Geophysical Union) | Wiley
    In:  Geophysical Research Letters, 41 (4). pp. 1238-1246.
    Details
    Publication Date: 2017-04-10
    Description: The Indian-Atlantic water exchange south of Africa (Agulhas leakage) is a key component of the global ocean circulation. No quantitative estimation of the paleo-Agulhas leakage exists. We quantify the variability in interocean exchange over the past 640,000 years, using planktic foraminiferal assemblage data from two marine sediment records to define an Agulhas leakage efficiency index. We confirm the validity of our new approach with a numerical ocean model that realistically simulates the modern Agulhas leakage changes. Our results suggest that, during the past several glacial-interglacial cycles, the Agulhas leakage varied by ~10 sverdrup and more during major climatic transitions. This lends strong credence to the hypothesis that modifications in the leakage played a key role in changing the overturning circulation to full strength mode. Our results are instrumental for validating and quantifying the contribution of the Indian-Atlantic water leakage to the global climate changes.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
    DOI: 10.1002/2014GL059278
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Late Glacial to Holocene history of the Mediterranean Outflow. Evidence from benthic foraminiferal assemblages and stable isotopes at the Portuguese margin (2000)
    Elsevier
    In:  Palaeogeography, Palaeoclimatology, Palaeoecology, 159 (1-2). pp. 85-111.
    Details
    Publication Date: 2020-08-07
    Description: Records of benthic foraminiferal assemblage variations and benthic δ13C along 12 sediment cores from the western Iberian Margin, between 36° and 42°N at water depths from 820 to 3580 m, are used to monitor fluctuations of the Mediterranean Outflow Water (MOW) during the past 30 ka. The chronostratigraphy of the cores is based on planktonic δ18O records, 14C AMS-dating, and the recognition of Heinrich Events H1 through H4. Increased abundances of suspension feeding benthic foraminifers, denoted as ’Epibenthos Group‘, closely match areas where the recent MOW core layers impinge on the continental slope at 800 and 1300 m water depth, and near-bottom current velocities are enhanced. Elevated ‘Epibenthos Group’ abundances, increased benthic δ13C, and sedimentological evidence for winnowing and erosion are found in glacial sections up to the earliest Termination I in cores at water depths between 1600 and 2200 m off southern Portugal. The combined evidence reveals enhanced current activity at these depths due to a deep glacial MOW. The MOW advection at the Portuguese margin during the last Glacial was about 700 m deeper than today, conceivably forced by increased MOW density due to higher salinity and colder temperatures of Mediterranean waters. The deep MOW current gradually decreased in strength and shoaled to 1300 m water depth during the Termination and early Holocene. A shallow MOW core layer became active with the onset of Termination I at depths between 600 and 1000 m. Both the shallow and deep MOW current culminated during the Younger Dryas period. The present flow pattern with two MOW core layers centred at 800 and 1300 m water depth was established between 7.5 and 5.5 ka.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1016/S0031-0182(00)00035-3
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Benthic foraminiferal δ18O in the ocean's temperature-salinity-density field: Constraints on Ice Age thermohaline circulation (2010)
    AGU (American Geophysical Union)
    In:  Paleoceanography, 6 (1). pp. 1-20.
    Details
    Publication Date: 2016-09-02
    Description: Benthic δ18O data from 95 core sites are used to infer possible temperature-salinity (T-S) fields of the Atlantic and Pacific oceans at the Last Glacial Maximum (LGM). A constraint of stable density stratification yields logically consistent scenarios for both T and S. The solutions are not unique but are useful as a thinking tool. To better constrain the inferences drawn from the spatial distribution of benthic δ18O, we must reduce scatter in the δ18O data with more high-quality measurements in high sedimentation rate cores. Also, we must intercalibrate mass spectrometers at different isotope laboratories more accurately, to insure our isotope data are compatible.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/90PA01882
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Investigating the Global Impacts of the Agulhas Current (2010)
    In:  Eos, Transactions American Geophysical Union, 91 (12). p. 109.
    Details
    Publication Date: 2017-02-10
    Description: The Agulhas Current is the major western boundary current of the Southern Hemisphere [Lutjeharms, 2006] and a key component of the global ocean “conveyor” circulation controlling the return flow to the Atlantic Ocean [Gordon, 1986]. As such, it is increasingly recognized as a key player in ocean thermohaline circulation, with importance for the meridional overturning circulation (MOC) of the Atlantic Ocean. Unusual dynamics pervade the motion of this warm-water current—as it moves west around the southern tip of Africa, it is retroflected back east by the Antarctic Circumpolar Current. Not all waters are captured by this sudden diversion of course—parts of the Agulhas Current leak away into the South Atlantic Ocean (Figure 1).
    Type: Article , NonPeerReviewed
    Format: text
    DOI: 10.1029/2010EO120001
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    OceanRep: Article in a Scientific Journal - without review
  • 9
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    The Role of the Agulhas System in Regional and Global Climate (2013)
    AGU (American Geophysical Union) | Wiley
    In:  Eos, Transactions American Geophysical Union, 94 (10). p. 100.
    Details
    Publication Date: 2016-08-05
    Description: AGU Chapman Conference: The Agulhas System and Its Role in Changing Ocean Circulation, Climate, and Marine Ecosystems; Stellenbosch, South Africa, 8–12 October 2012
    Type: Article , NonPeerReviewed
    Format: text
    DOI: 10.1002/2013EO100005
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    OceanRep: Article in a Scientific Journal - without review
  • 10
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    Paläo-Ozeanographie (2001)
    GeoForschungsZentrum Potsdam
    In:  In: Klimaweißbuch : Klimainformationen aus geowissenschaftlicher Forschung (Fallstudien) ; Stand und notwendige Erfordernisse der Paläoklimaforschung. , ed. by Negendank, J. F. W. Terra Nostra, 2001,7 . GeoForschungsZentrum Potsdam, Potsdam, pp. 53-57.
    Details
    Publication Date: 2014-07-23
    Type: Book chapter , NonPeerReviewed
    Format: text
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    OceanRep: Book chapter
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