Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula
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 o...
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crcambridgeupr:10.1006/qres.2002.2371 2024-10-13T14:01:45+00:00 Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula Khim, Boo-Keun Yoon, Ho Il Kang, Cheon Yun Bahk, Jang Jun 2002 http://dx.doi.org/10.1006/qres.2002.2371 http://api.elsevier.com/content/article/PII:S0033589402923719?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589402923719?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003358940001139X en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 58, issue 3, page 234-245 ISSN 0033-5894 1096-0287 journal-article 2002 crcambridgeupr https://doi.org/10.1006/qres.2002.2371 2024-09-18T04:03:45Z 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Cambridge University Press Antarctic Antarctic Peninsula Quaternary Research 58 3 234 245 |
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Cambridge University Press |
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language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Khim, Boo-Keun Yoon, Ho Il Kang, Cheon Yun Bahk, Jang Jun |
spellingShingle |
Khim, Boo-Keun Yoon, Ho Il Kang, Cheon Yun Bahk, Jang Jun Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula |
author_facet |
Khim, Boo-Keun Yoon, Ho Il Kang, Cheon Yun Bahk, Jang Jun |
author_sort |
Khim, Boo-Keun |
title |
Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula |
title_short |
Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula |
title_full |
Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula |
title_fullStr |
Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula |
title_full_unstemmed |
Unstable Climate Oscillations during the Late Holocene in the Eastern Bransfield Basin, Antarctic Peninsula |
title_sort |
unstable climate oscillations during the late holocene in the eastern bransfield basin, antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2002 |
url |
http://dx.doi.org/10.1006/qres.2002.2371 http://api.elsevier.com/content/article/PII:S0033589402923719?httpAccept=text/xml http://api.elsevier.com/content/article/PII:S0033589402923719?httpAccept=text/plain https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S003358940001139X |
geographic |
Antarctic Antarctic Peninsula |
geographic_facet |
Antarctic Antarctic Peninsula |
genre |
Antarc* Antarctic Antarctic Peninsula |
genre_facet |
Antarc* Antarctic Antarctic Peninsula |
op_source |
Quaternary Research volume 58, issue 3, page 234-245 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1006/qres.2002.2371 |
container_title |
Quaternary Research |
container_volume |
58 |
container_issue |
3 |
container_start_page |
234 |
op_container_end_page |
245 |
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1812812625216536576 |