Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607
Several proxies have been developed to reconstruct past sea surface temperature (SST), but different proxies may reflect temperatures of different seasons and each proxy is characterized by certain uncertainties. Therefore, a multiproxy approach is preferred to precisely reconstruct SST. Here, we re...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.820844 2023-05-15T18:25:57+02:00 Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 Lopes dos Santos, Raquel A Spooner, Michelle Barrows, Timothy T De Deckker, Patrick Sinninghe Damsté, Jaap S Schouten, Stefan LATITUDE: -36.960700 * LONGITUDE: 137.406500 * DATE/TIME START: 2003-02-20T19:33:00 * DATE/TIME END: 2003-02-20T19:33:00 2013-10-23 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.820844 https://doi.org/10.1594/PANGAEA.820844 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.820844 https://doi.org/10.1594/PANGAEA.820844 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Lopes dos Santos, Raquel A; Spooner, Michelle; Barrows, Timothy T; De Deckker, Patrick; Sinninghe Damsté, Jaap S; Schouten, Stefan (2013): Comparison of organic (UK'37, TEXH86, LDI) and faunal proxies (foraminiferal assemblages) for reconstruction of late Quaternary sea surface temperature variability from offshore southeastern Australia. Paleoceanography, 28(3), 377-387, https://doi.org/10.1002/palo.20035 AUSCAN CALYPSO Calypso Corer Marion Dufresne (1995) MD032607 MD03-2607 MD131 Southern Ocean Dataset 2013 ftpangaea https://doi.org/10.1594/PANGAEA.820844 https://doi.org/10.1002/palo.20035 2023-01-20T07:33:10Z Several proxies have been developed to reconstruct past sea surface temperature (SST), but different proxies may reflect temperatures of different seasons and each proxy is characterized by certain uncertainties. Therefore, a multiproxy approach is preferred to precisely reconstruct SST. Here, we reconstruct SST of the ocean offshore southeastern Australia (Murray Canyons area) for the last ~135 ka using three independent organic proxies (TEXH86 based on glycerol dialkyl glycerol tetraethers (GDGTs), UK'37 based on alkenones, and LDI based on long-chain diols) in addition to foraminiferal faunal assemblages. The organic proxy records show similar trends, with the highest temperature (21°C for UK'37 and TEXH86, and 25°C for LDI) during the last interglacial and lowest temperature (8°C for TEXH86, 10°C for UK'37, and 12°C for LDI) during the Last Glacial Maximum. However, the differences in absolute SST estimates obtained by the organic proxies varied over time with differences of up to 9°C between LDI and TEXH86. The seasonal SST reconstructions based on the modern analogue of foraminiferal assemblages also show similar trends as the organic proxies with highest temperatures during the last interglacial (23°C for the warmest month SST, 20°C for mean annual, and 18°C for the coolest month) and lowest temperature during the Last Glacial Maximum (14°C for the warmest month, 11°C for mean annual, and 9°C for the coolest month). Down core comparison between the reconstructed SSTs of the organic and inorganic proxies shows that LDI-inferred temperatures compare well with the temperature of the warmest month, TEXH86 with the temperature of the coolest month, and UK'37 with mean annual temperature. An increase in TEXH86 SST estimates relative to those of other proxies during deglaciations and interglacials suggests that either winter temperatures rapidly warmed, possibly due to an invigoration of the Leeuwin Current over the core site, or there was a change in the growth season of the Thaumarchaeota, the source organism ... Dataset Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean ENVELOPE(137.406500,137.406500,-36.960700,-36.960700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AUSCAN CALYPSO Calypso Corer Marion Dufresne (1995) MD032607 MD03-2607 MD131 Southern Ocean |
spellingShingle |
AUSCAN CALYPSO Calypso Corer Marion Dufresne (1995) MD032607 MD03-2607 MD131 Southern Ocean Lopes dos Santos, Raquel A Spooner, Michelle Barrows, Timothy T De Deckker, Patrick Sinninghe Damsté, Jaap S Schouten, Stefan Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 |
topic_facet |
AUSCAN CALYPSO Calypso Corer Marion Dufresne (1995) MD032607 MD03-2607 MD131 Southern Ocean |
description |
Several proxies have been developed to reconstruct past sea surface temperature (SST), but different proxies may reflect temperatures of different seasons and each proxy is characterized by certain uncertainties. Therefore, a multiproxy approach is preferred to precisely reconstruct SST. Here, we reconstruct SST of the ocean offshore southeastern Australia (Murray Canyons area) for the last ~135 ka using three independent organic proxies (TEXH86 based on glycerol dialkyl glycerol tetraethers (GDGTs), UK'37 based on alkenones, and LDI based on long-chain diols) in addition to foraminiferal faunal assemblages. The organic proxy records show similar trends, with the highest temperature (21°C for UK'37 and TEXH86, and 25°C for LDI) during the last interglacial and lowest temperature (8°C for TEXH86, 10°C for UK'37, and 12°C for LDI) during the Last Glacial Maximum. However, the differences in absolute SST estimates obtained by the organic proxies varied over time with differences of up to 9°C between LDI and TEXH86. The seasonal SST reconstructions based on the modern analogue of foraminiferal assemblages also show similar trends as the organic proxies with highest temperatures during the last interglacial (23°C for the warmest month SST, 20°C for mean annual, and 18°C for the coolest month) and lowest temperature during the Last Glacial Maximum (14°C for the warmest month, 11°C for mean annual, and 9°C for the coolest month). Down core comparison between the reconstructed SSTs of the organic and inorganic proxies shows that LDI-inferred temperatures compare well with the temperature of the warmest month, TEXH86 with the temperature of the coolest month, and UK'37 with mean annual temperature. An increase in TEXH86 SST estimates relative to those of other proxies during deglaciations and interglacials suggests that either winter temperatures rapidly warmed, possibly due to an invigoration of the Leeuwin Current over the core site, or there was a change in the growth season of the Thaumarchaeota, the source organism ... |
format |
Dataset |
author |
Lopes dos Santos, Raquel A Spooner, Michelle Barrows, Timothy T De Deckker, Patrick Sinninghe Damsté, Jaap S Schouten, Stefan |
author_facet |
Lopes dos Santos, Raquel A Spooner, Michelle Barrows, Timothy T De Deckker, Patrick Sinninghe Damsté, Jaap S Schouten, Stefan |
author_sort |
Lopes dos Santos, Raquel A |
title |
Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 |
title_short |
Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 |
title_full |
Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 |
title_fullStr |
Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 |
title_full_unstemmed |
Organic and faunal proxy based sea surface temperature reconstruction for sediment core MD03-2607 |
title_sort |
organic and faunal proxy based sea surface temperature reconstruction for sediment core md03-2607 |
publisher |
PANGAEA |
publishDate |
2013 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.820844 https://doi.org/10.1594/PANGAEA.820844 |
op_coverage |
LATITUDE: -36.960700 * LONGITUDE: 137.406500 * DATE/TIME START: 2003-02-20T19:33:00 * DATE/TIME END: 2003-02-20T19:33:00 |
long_lat |
ENVELOPE(137.406500,137.406500,-36.960700,-36.960700) |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Supplement to: Lopes dos Santos, Raquel A; Spooner, Michelle; Barrows, Timothy T; De Deckker, Patrick; Sinninghe Damsté, Jaap S; Schouten, Stefan (2013): Comparison of organic (UK'37, TEXH86, LDI) and faunal proxies (foraminiferal assemblages) for reconstruction of late Quaternary sea surface temperature variability from offshore southeastern Australia. Paleoceanography, 28(3), 377-387, https://doi.org/10.1002/palo.20035 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.820844 https://doi.org/10.1594/PANGAEA.820844 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.820844 https://doi.org/10.1002/palo.20035 |
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1766207693014433792 |