Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774
Assessment of changes in surface ocean conditions, in particular, sea-surface temperature (SST), is essential to understand long-term changes in climate especially in regions where continental climate is strongly influenced by oceanographic processes. To evaluate changes in SST in the northeast Paci...
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1995
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Online Access: | https://dx.doi.org/10.1594/pangaea.734016 https://doi.pangaea.de/10.1594/PANGAEA.734016 |
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ftdatacite:10.1594/pangaea.734016 2023-05-15T18:28:38+02:00 Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 Prahl, Frederick G Pisias, Nicklas G Sparrow, Margaret A Sabin, Anne 1995 application/zip https://dx.doi.org/10.1594/pangaea.734016 https://doi.pangaea.de/10.1594/PANGAEA.734016 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/95pa01394 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Piston corer Trigger corer W8709A Wecoma article Supplementary Collection of Datasets Collection 1995 ftdatacite https://doi.org/10.1594/pangaea.734016 https://doi.org/10.1029/95pa01394 2022-02-09T13:23:14Z Assessment of changes in surface ocean conditions, in particular, sea-surface temperature (SST), is essential to understand long-term changes in climate especially in regions where continental climate is strongly influenced by oceanographic processes. To evaluate changes in SST in the northeast Pacific, we have analyzed long-chain alkenones of prymnesiophyte origin at 38 depths in a piston and associated trigger core collected beneath the contemporary core of the California Current System at 42°N, ~270 km off the coast of Oregon/California. The samples span 30,000 years of deposition at this location. Unsaturation patterns (UK'37) in the alkenone series display a statistically significant difference (p <<0.001) between interglacial (0.44 ± 0.02, n = 11) and glacial (0.29 ± 0.04, n = 20) intervals of the cores. Detailed examination of other compositional features of the C37, C38, C39 alkenone series and a related C36 alkenoate series measured downcore suggests the published UK'37 - temperature calibration (UK'37 = 0.034 * T + 0.039 ) , defined for cultures of a strain of Emiliania huxleyi isolated from the subarctic Pacific, provides best estimates of winter SST at our study site. This inference is purely statistical and does not imply, however, that the phytoplankton source of these biomarkers is most productive in winter or at the ocean surface. The temperature record for UK'37 implies (1) an ~4°C shift occurred in winter SST from ~7.5 ± 1.1°C at the last glacial maximum to ~11.7 ± 0.7°C in the present interglacial period, and (2) this warming trend was confined to the time frame 14-10 Ka within the glacial to interglacial transition period. These conclusions are corroborated entirely by results from an independent SST transformation of radiolarian species assemblage data obtained from the same core materials. Article in Journal/Newspaper Subarctic DataCite Metadata Store (German National Library of Science and Technology) Pacific |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Piston corer Trigger corer W8709A Wecoma |
spellingShingle |
Piston corer Trigger corer W8709A Wecoma Prahl, Frederick G Pisias, Nicklas G Sparrow, Margaret A Sabin, Anne Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 |
topic_facet |
Piston corer Trigger corer W8709A Wecoma |
description |
Assessment of changes in surface ocean conditions, in particular, sea-surface temperature (SST), is essential to understand long-term changes in climate especially in regions where continental climate is strongly influenced by oceanographic processes. To evaluate changes in SST in the northeast Pacific, we have analyzed long-chain alkenones of prymnesiophyte origin at 38 depths in a piston and associated trigger core collected beneath the contemporary core of the California Current System at 42°N, ~270 km off the coast of Oregon/California. The samples span 30,000 years of deposition at this location. Unsaturation patterns (UK'37) in the alkenone series display a statistically significant difference (p <<0.001) between interglacial (0.44 ± 0.02, n = 11) and glacial (0.29 ± 0.04, n = 20) intervals of the cores. Detailed examination of other compositional features of the C37, C38, C39 alkenone series and a related C36 alkenoate series measured downcore suggests the published UK'37 - temperature calibration (UK'37 = 0.034 * T + 0.039 ) , defined for cultures of a strain of Emiliania huxleyi isolated from the subarctic Pacific, provides best estimates of winter SST at our study site. This inference is purely statistical and does not imply, however, that the phytoplankton source of these biomarkers is most productive in winter or at the ocean surface. The temperature record for UK'37 implies (1) an ~4°C shift occurred in winter SST from ~7.5 ± 1.1°C at the last glacial maximum to ~11.7 ± 0.7°C in the present interglacial period, and (2) this warming trend was confined to the time frame 14-10 Ka within the glacial to interglacial transition period. These conclusions are corroborated entirely by results from an independent SST transformation of radiolarian species assemblage data obtained from the same core materials. |
format |
Article in Journal/Newspaper |
author |
Prahl, Frederick G Pisias, Nicklas G Sparrow, Margaret A Sabin, Anne |
author_facet |
Prahl, Frederick G Pisias, Nicklas G Sparrow, Margaret A Sabin, Anne |
author_sort |
Prahl, Frederick G |
title |
Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 |
title_short |
Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 |
title_full |
Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 |
title_fullStr |
Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 |
title_full_unstemmed |
Sea surface temperature reconstruction of sediment profile W8709A-8, supplement to: Prahl, Frederick G; Pisias, Nicklas G; Sparrow, Margaret A; Sabin, Anne (1995): Assessment of sea-surface temperature at 42°N in the California Current over the last 30,000 years. Paleoceanography, 10(4), 763-774 |
title_sort |
sea surface temperature reconstruction of sediment profile w8709a-8, supplement to: prahl, frederick g; pisias, nicklas g; sparrow, margaret a; sabin, anne (1995): assessment of sea-surface temperature at 42°n in the california current over the last 30,000 years. paleoceanography, 10(4), 763-774 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1995 |
url |
https://dx.doi.org/10.1594/pangaea.734016 https://doi.pangaea.de/10.1594/PANGAEA.734016 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_relation |
https://dx.doi.org/10.1029/95pa01394 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.734016 https://doi.org/10.1029/95pa01394 |
_version_ |
1766211173379735552 |