NDLI: Meltwater discharge anomalies in marine isotope stage 3 from a sediment core in the south of Antarctic Polar Front, Drake Passage

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Meltwater discharge anomalies in marine isotope stage 3 from a sediment core in the south of Antarctic Polar Front, Drake Passage

Content Provider	Springer Nature Link
Author	Bae, Sung Ho Yoon, Ho Il Park, Byong Kwon Kim, Yeadong Bahk, Jang Jun Seo, Hyun Seok
Copyright Year	2003
Abstract	Marine isotope stages (MISs) 1 to 5 were identified in the planktonic δ$^{18}$O record in sediment core DP00-02 just south of the Antarctic Polar Front within the Drake Passage, Antarctica. The oxygen isotope record based onNeogloboquadrina pachyderma sinistral is well correlated with the contemporaneous global δ$^{18}$O stratigraphy. Marked differences from the global climate curve suggest a local/regional overprint, particularly during the MIS 3, which is considered as a colder time period in the ocean record than the MIS 1 and MIS 5 interglacial periods. The comparison shows that negative δ$^{18}$O shifts in the core DP00-02 during the MIS 3 are larger than mean global changes that 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 sea water which is linearly related to decreases in salinity rather than increases in sea-surface temperature. Increased ice-rafted debris (IRD) content during this period interval indicates strong influx of IRD from melting ice shelves and iceberg, which may be related to upwelling of warmer Circumpolar Deep Water.
Starting Page	73
Ending Page	79
Page Count	7
File Format	PDF
ISSN	12264806
Journal	Geosciences Journal
Volume Number	7
Issue Number	1
e-ISSN	15987477
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	meltwater discharge marine isotope stage (MIS) 3 Antarctic Polar Front Drake Passage Antarctica Geosciences
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Environmental Science

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