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  • Other Sources  (8)
  • Articles (OceanRep)  (8)
  • American Association for the Advancement of Science (AAAS)
  • American Society of Hematology
  • EMBO Press
  • Essen : Verl. Glückauf
  • Krefeld : Geologischer Dienst Nordhein-Westfalen
  • 1995-1999  (5)
  • 1975-1979  (3)
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  • Other Sources  (8)
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  • Articles (OceanRep)  (8)
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Year
  • 1
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 286 (5442). pp. 1132-1135.
    Publication Date: 2016-06-10
    Description: Chlorofluorocarbon-11 inventories for the deep Southern Ocean appear to confirm physical oceanographic and geochemical studies in the Southern Ocean, which suggest that no more than 5 × 106 cubic meters per second of ventilated deep water is currently being produced. This result conflicts with conclusions based on the distributions of the carbon-14/carbon ratio and a quasi-conservative property, PO4 *, in the deep sea, which seem to require an average of about 15 × 106cubic meters per second of Southern Ocean deep ventilation over about the past 800 years. A major reduction in Southern Ocean deep water production during the 20th century (from high rates during the Little Ice Age) may explain this apparent discordance. If this is true, a seesawing of deep water production between the northern Atlantic and Southern oceans may lie at the heart of the 1500-year ice-rafting cycle.
    Type: Article , PeerReviewed
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  • 2
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 284 (5411). pp. 118-120.
    Publication Date: 2019-05-10
    Description: A coral reef represents the net accumulation of calcium carbonate (CaCO3) produced by corals and other calcifying organisms. If calcification declines, then reef-building capacity also declines. Coral reef calcification depends on the saturation state of the carbonate mineral aragonite of surface waters. By the middle of the next century, an increased concentration of carbon dioxide will decrease the aragonite saturation state in the tropics by 30 percent and biogenic aragonite precipitation by 14 to 30 percent. Coral reefs are particularly threatened, because reef-building organisms secrete metastable forms of CaCO3, but the biogeochemical consequences on other calcifying marine ecosystems may be equally severe.
    Type: Article , PeerReviewed
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  • 3
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 276 (5320). p. 1790.
    Publication Date: 2021-04-15
    Type: Article , PeerReviewed
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  • 4
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 272 (5270). pp. 1902-1904.
    Publication Date: 2016-06-16
    Description: During glacial cycles, different parts of the Earth cool by different amounts. A growing collection of evidence has begun to show that cooling in the tropical oceans was greater than previously thought. In his Perspective, Broecker discusses the oxygen isotope evidence reported by Schrag et al. (p. 1930) that indicates that the cooling in deep tropical water was close to the freezing point.
    Type: Article , PeerReviewed
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  • 5
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 269 (5224). pp. 676-679.
    Publication Date: 2019-05-10
    Description: Greenland ice-core data have revealed large decadal climate variations over the North Atlantic that can be related to a major source of low-frequency variability, the North Atlantic Oscillation. Over the past decade, the Oscillation has remained in one extreme phase during the winters, contributing significantly to the recent wintertime warmth across Europe and to cold conditions in the northwest Atlantic. An evaluation of the atmospheric moisture budget reveals coherent large-scale changes since 1980 that are linked to recent dry conditions over southern Europe and the Mediterranean, whereas northern Europe and parts of Scandinavia have generally experienced wetter than normal conditions.
    Type: Article , PeerReviewed
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  • 6
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 204 (4391). pp. 404-407.
    Publication Date: 2019-05-24
    Description: The strontium to calcium ratio of skeletal aragonite in three genera of reef-building corals varies as a simple function of temperature and the strontium to calcium ratio of the incubation water. The strontiumlcalcium distribution coefficients of coral aragonite apparently differ from the corresponding coefficient of inorganically precipitated aragonite. With some care, coral skeletons can be used as recording thermometers.
    Type: Article , PeerReviewed
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  • 7
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 197 (4298). pp. 53-55.
    Publication Date: 2018-02-07
    Description: Estimation of average Cenozoic sedimentation rates for the Atlantic, Indian, and Pacific oceans indicates global synchronous fluctuations. Paleocene-early Eocene and late Eocene-early Miocene rates are only a fraction of middle Eocene and middle Miocene-Recent rates. These changes must reflect significantly different modes of continental weathering, which may be due to alternate states of atmospheric circulation marked by reduction of global precipitation.
    Type: Article , PeerReviewed
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  • 8
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    American Association for the Advancement of Science (AAAS)
    In:  Science, 191 (4231). pp. 1046-1048.
    Publication Date: 2020-05-08
    Description: Midwater squid respond to overhead illumination by turning on numerous downward-directed photophores; they turn off the photophores when overhead illumination is eliminated. The squid are invisible when the intensity of the photophores matches the intensity of the overhead illumination. These results strongly support the theory of ventral bioluminescent countershading.
    Type: Article , PeerReviewed
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