Journal ArticleDOI
Glacial to interglacial changes in carbonate and clay sedimentation in the Atlantic Ocean estimated from 230Th measurements
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The cause of the climatically controlled fluctuations in the carbonate content of deep-sea sediments remains the subject of uncertainty and debate as discussed by the authors, and three variables are involved: supply of biogenic carbonate, loss by dissolution, and dilution by non-carbonate phases.About:
This article is published in Chemical Geology.The article was published on 1984-07-01. It has received 212 citations till now. The article focuses on the topics: Carbonate & Lysocline.read more
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Journal ArticleDOI
Heinrich events: Massive late Pleistocene detritus layers of the North Atlantic and their global climate imprint
TL;DR: In this paper, the Heinrich detritus appears to have been derived from the region around Hudson Strait and was deposited over approximately 500 ± 250 years, and several mechanisms have been proposed for the origin of the layers: binge-purge cycle of the Laurentide ice sheet, jokulhlaup activity from Hudson Bay lake, and an ice shelf buildup/collapse fed by Hudson Strait.
Journal ArticleDOI
The World Ocean Silica Cycle
TL;DR: The resulting budget recognizes significantly higher input and output fluxes and notes that the recycling of silicon occurs mostly at the sediment-water interface and not during the sinking of silica particles through deep waters.
Journal ArticleDOI
Global connections between aeolian dust, climate and ocean biogeochemistry at the present day and at the last glacial maximum
TL;DR: In this paper, present-day sources and properties of dust, synthesise available records of dust deposition at the last glacial maximum (LGM); evaluate the evidence for changes in ocean palaeo-productivity associated with, and possibly caused by, changes in aeolian flux to the oceans at the LGM; and consider the radiative forcing effects of increased LGM dust loadings.
Book ChapterDOI
Chapter Fourteen Elemental Proxies for Palaeoclimatic and Palaeoceanographic Variability in Marine Sediments: Interpretation and Application
TL;DR: In this article, the elemental proxies for palaeoclimatic and palaeoceanographic variability in marine sediments are discussed, and the application of sedimentary geochemistry to the reconstruction of climatic and oceanographic changes over the Cenozoic is discussed.
Journal ArticleDOI
230Th-normalization: an essential tool for interpreting sedimentary fluxes during the late Quaternary
TL;DR: In this article, the authors proposed to normalize to the flux of 230 th scavenged from seawater, which is nearly constant and equivalent to the known rate of production of 230Th from the decay of dissolved 234U.
References
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Journal ArticleDOI
Uranium in open ocean: concentration and isotopic composition☆
TL;DR: Uranium concentrations and 234U/238U activity ratios have been determined in 63 seawater samples (nine vertical profiles) from the Atlantic, the Pacific, the Arctic, and the Antarctic oceans, using the alpha-spectrometric method for their determinations as discussed by the authors.
Journal ArticleDOI
Geochronological studies of deep sea sediments by the ionium/thorium method
Edward D. Goldberg,Minoru Koide +1 more
TL;DR: In this paper, a model for the mixing of the upper layers of the sediment, by worm-burrowing or near-bottom currents, is proposed and, if valid, allows the depth of mixing to be ascertained from the ionium/thorium profiles.
Journal Article
Carbon fluxes at the sediment-water interface of the deep-sea: calcium carbonate preservation.
Steven Emerson,Michael L. Bender +1 more
Journal ArticleDOI
Milankovitch Hypothesis Supported by Precise Dating of Coral Reefs and Deep-Sea Sediments
Wallace S. Broecker,David L. Thurber,John Goddard,Teh-Lung Ku,R. K. Matthews,Kenneth J. Mesolella +5 more
TL;DR: Data show a parallelism over the last 150,000 years between changes in Earth's climate and changes in the summer insolation predicted from cycles in the tilt and precession of Earth's axis.