Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia
To understand Holocene climatic development and to determine drivers of climatic changes and climate variability, high-resolution marine proxy records are required from key oceanic locations. However, information on the Holocene climate development from the Southern Hemisphere is still rare and main...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/50920 2023-05-15T18:24:45+02:00 Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia Moros, Matthias De Deckker, Patrick Jansen, Eystein Perner, Kerstin Telford, Richard J 2015-12-10T22:16:23Z http://hdl.handle.net/1885/50920 unknown Pergamon-Elsevier Ltd 0277-3791 http://hdl.handle.net/1885/50920 Quaternary Science Reviews Journal article 2015 ftanucanberra 2015-12-28T23:27:16Z To understand Holocene climatic development and to determine drivers of climatic changes and climate variability, high-resolution marine proxy records are required from key oceanic locations. However, information on the Holocene climate development from the Southern Hemisphere is still rare and mainly based on terrestrial archives. Here, we present data with a high-resolution of circa 35 years from sediment cores taken east of the Great Australian Bight, where it is possible to determine Southern Ocean Holocene climate and the longer-term trends of the El Niño-Southern Oscillation (ENSO) conditions. For this purpose, we used the oxygen-isotope records of two planktonic foraminifer species Globigerinoides ruber and Globigerina bulloides which inhabit different water masses as well as faunal counts of planktonic foraminifers. After the ocean frontal systems off southern Australia were pushed northward by orbitally-forced insolation changes during the early Holocene, the data indicate increasing ENSO variability during the mid to late Holocene when the fronts shifted polewards again. A strong circa 1550 year cycle is found in the Globigerina bulloides record which reflects the wider Southern Ocean signal with prominent cold phases centred at circa 9.2, 7.3, 5.8, 4.3, 2.7, 1.4 ka BP and, possibly the Little Ice Age, which have global counterparts. Article in Journal/Newspaper Southern Ocean Australian National University: ANU Digital Collections Southern Ocean |
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Open Polar |
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Australian National University: ANU Digital Collections |
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ftanucanberra |
language |
unknown |
description |
To understand Holocene climatic development and to determine drivers of climatic changes and climate variability, high-resolution marine proxy records are required from key oceanic locations. However, information on the Holocene climate development from the Southern Hemisphere is still rare and mainly based on terrestrial archives. Here, we present data with a high-resolution of circa 35 years from sediment cores taken east of the Great Australian Bight, where it is possible to determine Southern Ocean Holocene climate and the longer-term trends of the El Niño-Southern Oscillation (ENSO) conditions. For this purpose, we used the oxygen-isotope records of two planktonic foraminifer species Globigerinoides ruber and Globigerina bulloides which inhabit different water masses as well as faunal counts of planktonic foraminifers. After the ocean frontal systems off southern Australia were pushed northward by orbitally-forced insolation changes during the early Holocene, the data indicate increasing ENSO variability during the mid to late Holocene when the fronts shifted polewards again. A strong circa 1550 year cycle is found in the Globigerina bulloides record which reflects the wider Southern Ocean signal with prominent cold phases centred at circa 9.2, 7.3, 5.8, 4.3, 2.7, 1.4 ka BP and, possibly the Little Ice Age, which have global counterparts. |
format |
Article in Journal/Newspaper |
author |
Moros, Matthias De Deckker, Patrick Jansen, Eystein Perner, Kerstin Telford, Richard J |
spellingShingle |
Moros, Matthias De Deckker, Patrick Jansen, Eystein Perner, Kerstin Telford, Richard J Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia |
author_facet |
Moros, Matthias De Deckker, Patrick Jansen, Eystein Perner, Kerstin Telford, Richard J |
author_sort |
Moros, Matthias |
title |
Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia |
title_short |
Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia |
title_full |
Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia |
title_fullStr |
Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia |
title_full_unstemmed |
Holocene climate variability in the Southern Ocean recorded in a deep-sea sediment core off South Australia |
title_sort |
holocene climate variability in the southern ocean recorded in a deep-sea sediment core off south australia |
publisher |
Pergamon-Elsevier Ltd |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/50920 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Quaternary Science Reviews |
op_relation |
0277-3791 http://hdl.handle.net/1885/50920 |
_version_ |
1766205614693810176 |