Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K')
Two sediment cores from the western Arabian Sea, NIOP905 and 74KL, were analyzed to determine sea surface temperature (SST) variations over the last 23 kyr. Two organic molecular SST proxies were used, the well-established U37K' based on long-chain unsaturated ketones synthesized by haptophyte...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2006
|
Subjects: | |
Online Access: | https://ddd.uab.cat/record/25435 |
id |
ftuabarcelonapb:oai:ddd.uab.cat:25435 |
---|---|
record_format |
openpolar |
spelling |
ftuabarcelonapb:oai:ddd.uab.cat:25435 2023-05-15T13:49:48+02:00 Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') Huguet, Carme Kim, Jung-Hyun Sinninghe Damsté, Jaap S. Schouten, Stefan 2006 application/pdf https://ddd.uab.cat/record/25435 eng eng Paleoceanography Vol. 21, Issue 3 (September 2006), p. PA3003 https://ddd.uab.cat/record/25435 urn:10.1029/2005PA001215 urn:oai:ddd.uab.cat:25435 urn:recercauab:ARE-68538 urn:scopus_id:34249105848 urn:wos_id:000239582100001 urn:altmetric_id:20811009 urn:oai:egreta.uab.cat:publications/bf7c17b7-84af-4db5-917f-8da86ad1d4c2 open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ Arabian Sea Organic and biogenic geochemistry Glacial Sea surface temperature Article 2006 ftuabarcelonapb 2023-02-06T20:44:59Z Two sediment cores from the western Arabian Sea, NIOP905 and 74KL, were analyzed to determine sea surface temperature (SST) variations over the last 23 kyr. Two organic molecular SST proxies were used, the well-established U37K' based on long-chain unsaturated ketones synthesized by haptophyte algae and the newly proposed TEX86 derived from the membrane lipids of Crenarchaeota. Comparison of NIOP905 and 74KL core top data with present-day SST (0-10 m) values indicates that both proxies yield temperatures similar to local annual mean SSTs. However, TEX86 and U37K' SST down-core records derived from the same cores differ in magnitude and phasing. The alkenone SST record of NIOP905 shows small changes in SST (∼0.5°C) over the last 23 kyr, while that of core 74KL shows a ∼2°C increase from the Last Glacial Maximum (LGM) (23-19 calendar (cal) kyr B.P.) through the Holocene (the last 11.5 cal kyr B.P.) synchronous with changes in the Northern Hemisphere. In contrast, the TEX86 records of both cores show a large increase in SST from 22°-23°C in the LGM to 28°-30°C during Termination I (19-11.5 cal kyr B.P.), decreasing to present-day annual means of ∼26°C. A cold phase between 14.5 and 12 cal kyr B.P. that may correspond to the Antarctic cold reversal is also observed. This implies a Southern Hemisphere control on tropical SST reconstructed by the TEX86, possibly related to SW monsoon. Our results suggest that the application of both TEX86 and U37K' give different but complementary information on SST developments in past marine environments. Article in Journal/Newspaper Antarc* Antarctic Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB Antarctic The Antarctic Paleoceanography 21 3 |
institution |
Open Polar |
collection |
Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
op_collection_id |
ftuabarcelonapb |
language |
English |
topic |
Arabian Sea Organic and biogenic geochemistry Glacial Sea surface temperature |
spellingShingle |
Arabian Sea Organic and biogenic geochemistry Glacial Sea surface temperature Huguet, Carme Kim, Jung-Hyun Sinninghe Damsté, Jaap S. Schouten, Stefan Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') |
topic_facet |
Arabian Sea Organic and biogenic geochemistry Glacial Sea surface temperature |
description |
Two sediment cores from the western Arabian Sea, NIOP905 and 74KL, were analyzed to determine sea surface temperature (SST) variations over the last 23 kyr. Two organic molecular SST proxies were used, the well-established U37K' based on long-chain unsaturated ketones synthesized by haptophyte algae and the newly proposed TEX86 derived from the membrane lipids of Crenarchaeota. Comparison of NIOP905 and 74KL core top data with present-day SST (0-10 m) values indicates that both proxies yield temperatures similar to local annual mean SSTs. However, TEX86 and U37K' SST down-core records derived from the same cores differ in magnitude and phasing. The alkenone SST record of NIOP905 shows small changes in SST (∼0.5°C) over the last 23 kyr, while that of core 74KL shows a ∼2°C increase from the Last Glacial Maximum (LGM) (23-19 calendar (cal) kyr B.P.) through the Holocene (the last 11.5 cal kyr B.P.) synchronous with changes in the Northern Hemisphere. In contrast, the TEX86 records of both cores show a large increase in SST from 22°-23°C in the LGM to 28°-30°C during Termination I (19-11.5 cal kyr B.P.), decreasing to present-day annual means of ∼26°C. A cold phase between 14.5 and 12 cal kyr B.P. that may correspond to the Antarctic cold reversal is also observed. This implies a Southern Hemisphere control on tropical SST reconstructed by the TEX86, possibly related to SW monsoon. Our results suggest that the application of both TEX86 and U37K' give different but complementary information on SST developments in past marine environments. |
format |
Article in Journal/Newspaper |
author |
Huguet, Carme Kim, Jung-Hyun Sinninghe Damsté, Jaap S. Schouten, Stefan |
author_facet |
Huguet, Carme Kim, Jung-Hyun Sinninghe Damsté, Jaap S. Schouten, Stefan |
author_sort |
Huguet, Carme |
title |
Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') |
title_short |
Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') |
title_full |
Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') |
title_fullStr |
Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') |
title_full_unstemmed |
Reconstruction of sea surface temperature variations in the Arabian Sea over the last 23 kyr using organic proxies (TEX86 and U37K') |
title_sort |
reconstruction of sea surface temperature variations in the arabian sea over the last 23 kyr using organic proxies (tex86 and u37k') |
publishDate |
2006 |
url |
https://ddd.uab.cat/record/25435 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Paleoceanography Vol. 21, Issue 3 (September 2006), p. PA3003 https://ddd.uab.cat/record/25435 urn:10.1029/2005PA001215 urn:oai:ddd.uab.cat:25435 urn:recercauab:ARE-68538 urn:scopus_id:34249105848 urn:wos_id:000239582100001 urn:altmetric_id:20811009 urn:oai:egreta.uab.cat:publications/bf7c17b7-84af-4db5-917f-8da86ad1d4c2 |
op_rights |
open access Tots els drets reservats. https://rightsstatements.org/vocab/InC/1.0/ |
container_title |
Paleoceanography |
container_volume |
21 |
container_issue |
3 |
_version_ |
1766252304182280192 |