Holocene subsurface temperature variability in the eastern Antarctic continental margin
We reconstructed subsurface (∼45-200m water depth) temperature variability in the eastern Antarctic continental margin during the late Holocene, using an archaeal lipid-based temperature proxy (TEX 86 L). Our results reveal that subsurface temperature changes were probably positively coupled to the...
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Edith Cowan University, Research Online, Perth, Western Australia
2012
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ftedithcowan:oai:ro.ecu.edu.au:ecuworks2012-1407 2023-05-15T13:32:23+02:00 Holocene subsurface temperature variability in the eastern Antarctic continental margin Kim, J H Crosta, X Willmott, V Renssen, H Bonnin, J Helmke, Peer Schouten, S Sinninghe Damste, J S 2012-01-01T08:00:00Z application/pdf https://ro.ecu.edu.au/ecuworks2012/408 https://ro.ecu.edu.au/cgi/viewcontent.cgi?article=1407&context=ecuworks2012 unknown Edith Cowan University, Research Online, Perth, Western Australia https://ro.ecu.edu.au/ecuworks2012/408 https://ro.ecu.edu.au/cgi/viewcontent.cgi?article=1407&context=ecuworks2012 free_to_read Research outputs 2012 Antarctic Circumpolar Currents Archaeal Climate dynamics Continental margin Continental shelves Deep Water High frequency Holocenes Ice sheet Late Holocene Sea ice extent Sea temperature Seasonal variability Southern oscillation Subsurface temperature Temperature proxy Temperature variability Thermohaline circulations Water depth Ocean currents Sea ice Atmospheric pressure Antarctic Circumpolar Wave continental shelf El Nino-Southern Oscillation frequency analysis Holocene lipid paleoclimate paleoenvironment proxy climate record reconstruction seasonal variation temperature gradient thermohaline circulation Antarctica Archaea Environmental Sciences text 2012 ftedithcowan 2022-02-06T22:00:48Z We reconstructed subsurface (∼45-200m water depth) temperature variability in the eastern Antarctic continental margin during the late Holocene, using an archaeal lipid-based temperature proxy (TEX 86 L). Our results reveal that subsurface temperature changes were probably positively coupled to the variability of warmer, nutrient-rich Modified Circumpolar Deep Water (MCDW, deep water of the Antarctic circumpolar current) intrusion onto the continental shelf. The TEX 86 L record, in combination with previously published climatic records, indicates that this coupling was probably related to the thermohaline circulation, seasonal variability in sea ice extent, sea temperature, and wind associated with high frequency climate dynamics at low-latitudes such as internal El Nio Southern Oscillation (ENSO). This in turn suggests a linkage between centennial ENSO-like variability at low-latitudes and intrusion variability of MCDW into the eastern Antarctic continental shelf, which might have further impact on ice sheet evolution. Copyright 2012 by the American Geophysical Union. Text Antarc* Antarctic Antarctica Ice Sheet Sea ice Edith Cowan University (ECU, Australia): Research Online Antarctic The Antarctic |
institution |
Open Polar |
collection |
Edith Cowan University (ECU, Australia): Research Online |
op_collection_id |
ftedithcowan |
language |
unknown |
topic |
Antarctic Circumpolar Currents Archaeal Climate dynamics Continental margin Continental shelves Deep Water High frequency Holocenes Ice sheet Late Holocene Sea ice extent Sea temperature Seasonal variability Southern oscillation Subsurface temperature Temperature proxy Temperature variability Thermohaline circulations Water depth Ocean currents Sea ice Atmospheric pressure Antarctic Circumpolar Wave continental shelf El Nino-Southern Oscillation frequency analysis Holocene lipid paleoclimate paleoenvironment proxy climate record reconstruction seasonal variation temperature gradient thermohaline circulation Antarctica Archaea Environmental Sciences |
spellingShingle |
Antarctic Circumpolar Currents Archaeal Climate dynamics Continental margin Continental shelves Deep Water High frequency Holocenes Ice sheet Late Holocene Sea ice extent Sea temperature Seasonal variability Southern oscillation Subsurface temperature Temperature proxy Temperature variability Thermohaline circulations Water depth Ocean currents Sea ice Atmospheric pressure Antarctic Circumpolar Wave continental shelf El Nino-Southern Oscillation frequency analysis Holocene lipid paleoclimate paleoenvironment proxy climate record reconstruction seasonal variation temperature gradient thermohaline circulation Antarctica Archaea Environmental Sciences Kim, J H Crosta, X Willmott, V Renssen, H Bonnin, J Helmke, Peer Schouten, S Sinninghe Damste, J S Holocene subsurface temperature variability in the eastern Antarctic continental margin |
topic_facet |
Antarctic Circumpolar Currents Archaeal Climate dynamics Continental margin Continental shelves Deep Water High frequency Holocenes Ice sheet Late Holocene Sea ice extent Sea temperature Seasonal variability Southern oscillation Subsurface temperature Temperature proxy Temperature variability Thermohaline circulations Water depth Ocean currents Sea ice Atmospheric pressure Antarctic Circumpolar Wave continental shelf El Nino-Southern Oscillation frequency analysis Holocene lipid paleoclimate paleoenvironment proxy climate record reconstruction seasonal variation temperature gradient thermohaline circulation Antarctica Archaea Environmental Sciences |
description |
We reconstructed subsurface (∼45-200m water depth) temperature variability in the eastern Antarctic continental margin during the late Holocene, using an archaeal lipid-based temperature proxy (TEX 86 L). Our results reveal that subsurface temperature changes were probably positively coupled to the variability of warmer, nutrient-rich Modified Circumpolar Deep Water (MCDW, deep water of the Antarctic circumpolar current) intrusion onto the continental shelf. The TEX 86 L record, in combination with previously published climatic records, indicates that this coupling was probably related to the thermohaline circulation, seasonal variability in sea ice extent, sea temperature, and wind associated with high frequency climate dynamics at low-latitudes such as internal El Nio Southern Oscillation (ENSO). This in turn suggests a linkage between centennial ENSO-like variability at low-latitudes and intrusion variability of MCDW into the eastern Antarctic continental shelf, which might have further impact on ice sheet evolution. Copyright 2012 by the American Geophysical Union. |
format |
Text |
author |
Kim, J H Crosta, X Willmott, V Renssen, H Bonnin, J Helmke, Peer Schouten, S Sinninghe Damste, J S |
author_facet |
Kim, J H Crosta, X Willmott, V Renssen, H Bonnin, J Helmke, Peer Schouten, S Sinninghe Damste, J S |
author_sort |
Kim, J H |
title |
Holocene subsurface temperature variability in the eastern Antarctic continental margin |
title_short |
Holocene subsurface temperature variability in the eastern Antarctic continental margin |
title_full |
Holocene subsurface temperature variability in the eastern Antarctic continental margin |
title_fullStr |
Holocene subsurface temperature variability in the eastern Antarctic continental margin |
title_full_unstemmed |
Holocene subsurface temperature variability in the eastern Antarctic continental margin |
title_sort |
holocene subsurface temperature variability in the eastern antarctic continental margin |
publisher |
Edith Cowan University, Research Online, Perth, Western Australia |
publishDate |
2012 |
url |
https://ro.ecu.edu.au/ecuworks2012/408 https://ro.ecu.edu.au/cgi/viewcontent.cgi?article=1407&context=ecuworks2012 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Sea ice |
op_source |
Research outputs 2012 |
op_relation |
https://ro.ecu.edu.au/ecuworks2012/408 https://ro.ecu.edu.au/cgi/viewcontent.cgi?article=1407&context=ecuworks2012 |
op_rights |
free_to_read |
_version_ |
1766026261455437824 |