Unstable climate oscillations during the late Holocene in the eastern Bransfield Basin, Antarctic Peninsula SCIE SCOPUS

Cited 34 time in WEB OF SCIENCE Cited 37 time in Scopus
Title
Unstable climate oscillations during the late Holocene in the eastern Bransfield Basin, Antarctic Peninsula
Author(s)
Khim, BK; Yoon, HI; Kang, CY; Bahk, JJ
Publication Year
2002-11
Abstract
Core A9-EB2 from the eastern Bransfield Basin, Antarctic Peninsula, consists of pelagic (diatom ooze-clay couplets and bioturbated diatom ooze) and hemipelagic (bioturbated mud) sediments interbedded with turbidites (homogeneous mud and silt-clay couplets). The cyclic and laminated nature of these pelagic sediments represents alternation between the deposition of diatom-rich biogenic sediments and of terrigenous sediments. Sediment properties and geochemical data explain the contrasting lamination, with light layers being finer-grained and relatively rich in total organic carbon and biogenic silica content. Also, the high-resolution magnetic susceptibility (MS) variations highlight distinct features: high MS values coincide with clastic-rich sections and low MS values correspond to biogenic sections. The chronology developed for core A9-EB2 accounts for anomalous ages associated with turbidites and shows a linear sedimentation rate of approximately 87 cm/10(3) yr, which is supported by an accumulation rate of 80 cm/10(3) yr calculated from (210)Pb activity. The late Holocene records clearly identify Neoglacial events of the Little Ice Age (LIA) and Medieval Warm Period (MWP). Other unexplained climatic events comparable in duration and amplitude to the LIA and MWP events also appear in the MS record, suggesting intrinsically unstable climatic conditions during the late Holocene in the Bransfield Basin of Antarctic Peninsula. (C) 2002 University of Washington.
ISSN
0033-5894
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5648
DOI
10.1006/qres.2002.2371
Bibliographic Citation
QUATERNARY RESEARCH, v.58, no.3, pp.234 - 245, 2002
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Subject
GREENLAND ICE-CORE; MARINE-SEDIMENTS; SOUTHERN-OCEAN; CONTINENTAL-SHELF; PARTICLE-FLUX; SEA; STRAIT; RADIOCARBON; RECORDS; EVOLUTION
Keywords
organic carbon; biogenic silica; magnetic susceptibility; paleoproductivity; climate; Late Holocene; Bransfield Basin; Antarctic
Type
Article
Language
English
Document Type
Article
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
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