Sea surface temperature reconstruction of ODP Site 175-1087
Successful application of the alkenone palaeothermometer, the UK'37 index, relies upon the assumption that fossil alkenone synthesisers responded to growth-temperature changes in a similar manner to the modern producers, chiefly the coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica....
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.738377 2023-05-15T18:21:13+02:00 Sea surface temperature reconstruction of ODP Site 175-1087 McClymont, Erin L Rosell-Melé, V Giraudeau, Jacques Pierre, Catherine Lloyd, Jerry M LATITUDE: -31.465083 * LONGITUDE: 15.310889 * DATE/TIME START: 1997-10-03T00:00:00 * DATE/TIME END: 1997-10-03T00:00:00 2005-05-26 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.738377 https://doi.org/10.1594/PANGAEA.738377 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.738377 https://doi.org/10.1594/PANGAEA.738377 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: McClymont, Erin L; Rosell-Melé, V; Giraudeau, Jacques; Pierre, Catherine; Lloyd, Jerry M (2005): Alkenone and coccolith records of the mid-Pleistocene in the south-east Atlantic: implications for the Uk37' index and South African climate. Quaternary Science Reviews, 24(14-15), 1559-1572, https://doi.org/10.1016/j.quascirev.2004.06.024 175-1087 Benguela Current South Atlantic Ocean COMPCORE Composite Core Joides Resolution Leg175 Ocean Drilling Program ODP Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.738377 https://doi.org/10.1016/j.quascirev.2004.06.024 2023-01-20T07:31:48Z Successful application of the alkenone palaeothermometer, the UK'37 index, relies upon the assumption that fossil alkenone synthesisers responded to growth-temperature changes in a similar manner to the modern producers, chiefly the coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica. We compare coccolith and UK'37 data from ODP Site 1087 in the south-east Atlantic between 1500 and 500 ka, and show that evolutionary events and changes in species dominance within the coccolithophore populations had little impact on the UK'37 record. The relative abundances of the C37 and C38 alkenones also closely resembled those found in modern populations, and suggest a similar temperature sensitivity of UK'37 during the early and mid-Pleistocene to that found at present. These results support the application of the UK'37 index to reconstruct sea-surface temperatures (SSTs) throughout the Quaternary. The UK'37 record at ODP Site 1087 contains an SST signal that documents the emergence of the 100-kyr cycles that characterise the late Quaternary ice volume records. This is preceded by significant cooling at ODP Site 1087, marked by a negative shift in SSTs and a positive shift in the planktonic delta18O some 250-kyr earlier, at ca 1150-1000 ka. This results in a permanent fall in average SSTs of around 1.5 °C. The predicted increase in aridity onshore as a result of this cooling can be identified in a number of published records from southern Africa, and may have played a role in some important evolutionary events of the mid-Pleistocene. Dataset South Atlantic Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(15.310889,15.310889,-31.465083,-31.465083) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
175-1087 Benguela Current South Atlantic Ocean COMPCORE Composite Core Joides Resolution Leg175 Ocean Drilling Program ODP |
spellingShingle |
175-1087 Benguela Current South Atlantic Ocean COMPCORE Composite Core Joides Resolution Leg175 Ocean Drilling Program ODP McClymont, Erin L Rosell-Melé, V Giraudeau, Jacques Pierre, Catherine Lloyd, Jerry M Sea surface temperature reconstruction of ODP Site 175-1087 |
topic_facet |
175-1087 Benguela Current South Atlantic Ocean COMPCORE Composite Core Joides Resolution Leg175 Ocean Drilling Program ODP |
description |
Successful application of the alkenone palaeothermometer, the UK'37 index, relies upon the assumption that fossil alkenone synthesisers responded to growth-temperature changes in a similar manner to the modern producers, chiefly the coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica. We compare coccolith and UK'37 data from ODP Site 1087 in the south-east Atlantic between 1500 and 500 ka, and show that evolutionary events and changes in species dominance within the coccolithophore populations had little impact on the UK'37 record. The relative abundances of the C37 and C38 alkenones also closely resembled those found in modern populations, and suggest a similar temperature sensitivity of UK'37 during the early and mid-Pleistocene to that found at present. These results support the application of the UK'37 index to reconstruct sea-surface temperatures (SSTs) throughout the Quaternary. The UK'37 record at ODP Site 1087 contains an SST signal that documents the emergence of the 100-kyr cycles that characterise the late Quaternary ice volume records. This is preceded by significant cooling at ODP Site 1087, marked by a negative shift in SSTs and a positive shift in the planktonic delta18O some 250-kyr earlier, at ca 1150-1000 ka. This results in a permanent fall in average SSTs of around 1.5 °C. The predicted increase in aridity onshore as a result of this cooling can be identified in a number of published records from southern Africa, and may have played a role in some important evolutionary events of the mid-Pleistocene. |
format |
Dataset |
author |
McClymont, Erin L Rosell-Melé, V Giraudeau, Jacques Pierre, Catherine Lloyd, Jerry M |
author_facet |
McClymont, Erin L Rosell-Melé, V Giraudeau, Jacques Pierre, Catherine Lloyd, Jerry M |
author_sort |
McClymont, Erin L |
title |
Sea surface temperature reconstruction of ODP Site 175-1087 |
title_short |
Sea surface temperature reconstruction of ODP Site 175-1087 |
title_full |
Sea surface temperature reconstruction of ODP Site 175-1087 |
title_fullStr |
Sea surface temperature reconstruction of ODP Site 175-1087 |
title_full_unstemmed |
Sea surface temperature reconstruction of ODP Site 175-1087 |
title_sort |
sea surface temperature reconstruction of odp site 175-1087 |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.738377 https://doi.org/10.1594/PANGAEA.738377 |
op_coverage |
LATITUDE: -31.465083 * LONGITUDE: 15.310889 * DATE/TIME START: 1997-10-03T00:00:00 * DATE/TIME END: 1997-10-03T00:00:00 |
long_lat |
ENVELOPE(15.310889,15.310889,-31.465083,-31.465083) |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Supplement to: McClymont, Erin L; Rosell-Melé, V; Giraudeau, Jacques; Pierre, Catherine; Lloyd, Jerry M (2005): Alkenone and coccolith records of the mid-Pleistocene in the south-east Atlantic: implications for the Uk37' index and South African climate. Quaternary Science Reviews, 24(14-15), 1559-1572, https://doi.org/10.1016/j.quascirev.2004.06.024 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.738377 https://doi.org/10.1594/PANGAEA.738377 |
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.738377 https://doi.org/10.1016/j.quascirev.2004.06.024 |
_version_ |
1766200379526086656 |