NDLI: Late Quaternary stable isotope record and meltwater discharge anomaly events to the south of the Antarctic Polar Front, Drake Passage

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Geo-Marine Letters : Volume 23, Issue 1, August 2003

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Late Quaternary stable isotope record and meltwater discharge anomaly events to the south of the Antarctic Polar Front, Drake Passage

Content Provider	Springer Nature Link
Author	Bae, Sung Ho Yoon, Ho Il Park, Byong Kwon Kim, Yeadong
Copyright Year	2003
Abstract	Marine isotope stages (MISs) 1 to 5 were identified in the planktonic δ18O record in sediment core DP00-02 just south of the Antarctic Polar Front in the Drake Passage, Antarctica. The oxygen isotope record, based on Neogloboquadrina pachyderma sinistral, is correlated with the contemporaneous global δ18O stratigraphy. Marked deviations from the global climate curve suggest a local/regional overprint, particularly during MIS 3 which is considered a colder time period in the ocean record than MIS 1 and MIS 5 during the last interglacial. The comparison shows that negative δ18O shifts in core DP00-02 during MIS 3 are larger than mean global changes which show a shift equal to or smaller than 0.5‰. The isotope shift, exceeding the glacial-interglacial ice volume effect, probably resulted from changes in the isotope composition of seawater, which is linearly related to decreases in salinity rather than to increases in sea-surface temperature. Increased ice-rafted debris (IRD) content during this interval indicates a strong influx of IRD from melting ice shelves and icebergs, which may be related to upwelling of warmer circumpolar deep water.
Starting Page	110
Ending Page	116
Page Count	7
File Format	PDF
ISSN	02760460
Journal	Geo-Marine Letters
Volume Number	23
Issue Number	2
e-ISSN	14321157
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-09-06
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Content Type	Text
Resource Type	Article
Subject	Environmental Science Geotechnical Engineering and Engineering Geology Oceanography

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