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  • AGU (American Geophysical Union)  (3)
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  • 1
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    The chronology of the last Deglaciation: Implications to the cause of the Younger Dryas Event (1988)
    AGU (American Geophysical Union)
    In:  Paleoceanography, 3 (1). pp. 1-19.
    Details
    Publication Date: 2016-06-16
    Description: It has long been recognized that the transition from the last glacial to the present interglacial was punctuated by a brief and intense return to cold conditions. This extraordinary event, referred to by European palynologists as the Younger Dryas, was centered in the northern Atlantic basin. Evidence is accumulating that it may have been initiated and terminated by changes in the mode of operation of the northern Atlantic Ocean. Further, it appears that these mode changes may have been triggered by diversions of glacial meltwater between the Mississippi River and the St. Lawrence River drainage systems. We report here Accelerator Mass Spectrometry (AMS) radiocarbon results on two strategically located deep-sea cores. One provides a chronology for surface water temperatures in the northern Atlantic and the other for the meltwater discharge from the Mississippi River. Our objective in obtaining these results was to strengthen our ability to correlate the air temperature history for the northern Atlantic basin with the meltwater history for the Laurentian ice sheet.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/PA003i001p00001
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 2
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    Comparison between radiocarbon ages obtained on coexisting planktonic foraminifera (1988)
    AGU (American Geophysical Union)
    In:  Paleoceanography, 3 (6). pp. 647-657.
    Details
    Publication Date: 2016-06-15
    Description: As a test of the reliability of paleocean ventilation rates reconstructed from radiocarbon age differences between planktonic and benthic foraminifera, measurements have been made on coexisting species of planktonic foraminifera. While ideally no differences should exist, we do find them. In this paper we discuss the possible causes for these differences and attempt to evaluate their impact on the interpretation of benthic-planktonic age differences.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/PA003i006p00647
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 3
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    Preliminary estimates for the radiocarbon age of deep water in the glacial ocean (1988)
    AGU (American Geophysical Union)
    In:  Paleoceanography, 3 (6). pp. 659-669.
    Details
    Publication Date: 2016-06-15
    Description: Radiocarbon ages for benthic and planktonic foraminifera from the late glacial sections of two Atlantic and two Pacific cores are reported. The differences for benthic-planktonic pairs suggest that the radiocarbon age for deep Atlantic water was somewhat larger than today's (i.e., 600±250, as opposed to 400 years) and that the radiocarbon age for deep Pacific water was also slightly larger than today's (2100±400, as opposed to 1600, years). Our results suggest that during glacial time, the deep Pacific was, as it is today, significantly depleted in radiocarbon relative to the deep Atlantic. As many questions remain unanswered regarding the reliability of this approach, these conclusions must be considered to be preliminary.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1029/PA003i006p00659
    Location Call Number Limitation Availability
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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