Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions
We demonstrate that the temperature signal in the planktonic foraminifera assemblage data from the North Atlantic typically does not originate from near-surface waters and argue that this has the potential to bias sea surface temperature reconstructions using transfer functions calibrated against ne...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Gesellschaft Mbh
2013
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/00181/29202/27585.pdf https://doi.org/10.5194/cp-9-859-2013 https://archimer.ifremer.fr/doc/00181/29202/ |
id |
ftarchimer:oai:archimer.ifremer.fr:29202 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:29202 2023-05-15T17:28:21+02:00 Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions Telford, R. J. Li, C. Kucera, M. 2013 application/pdf https://archimer.ifremer.fr/doc/00181/29202/27585.pdf https://doi.org/10.5194/cp-9-859-2013 https://archimer.ifremer.fr/doc/00181/29202/ eng eng Copernicus Gesellschaft Mbh https://archimer.ifremer.fr/doc/00181/29202/27585.pdf doi:10.5194/cp-9-859-2013 https://archimer.ifremer.fr/doc/00181/29202/ Author(s) 2013. CC Attribution 3.0 License info:eu-repo/semantics/openAccess restricted use CC-BY Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2013 , Vol. 9 , N. 2 , P. 859-870 text Publication info:eu-repo/semantics/article 2013 ftarchimer https://doi.org/10.5194/cp-9-859-2013 2021-09-23T20:24:10Z We demonstrate that the temperature signal in the planktonic foraminifera assemblage data from the North Atlantic typically does not originate from near-surface waters and argue that this has the potential to bias sea surface temperature reconstructions using transfer functions calibrated against near-surface temperatures if the thermal structure of the upper few hundred metres of ocean changes over time. CMIP5 climate models indicate that ocean thermal structure in the North Atlantic changed between the Last Glacial Maximum (LGM) and the pre-industrial (PI), with some regions, mainly in the tropics, of the LGM ocean lacking good thermal analogues in the PI. Transfer functions calibrated against different depths reconstruct a marked subsurface cooling in parts of the tropical North Atlantic during the last glacial, in contrast to previous studies that reconstruct only a modest cooling. These possible biases in temperature reconstructions may affect estimates of climate sensitivity based on the difference between LGM and pre-industrial climate. Quantifying these biases has the potential to alter our understanding of LGM climate and improve estimates of climate sensitivity. Article in Journal/Newspaper North Atlantic Planktonic foraminifera Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Climate of the Past 9 2 859 870 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
description |
We demonstrate that the temperature signal in the planktonic foraminifera assemblage data from the North Atlantic typically does not originate from near-surface waters and argue that this has the potential to bias sea surface temperature reconstructions using transfer functions calibrated against near-surface temperatures if the thermal structure of the upper few hundred metres of ocean changes over time. CMIP5 climate models indicate that ocean thermal structure in the North Atlantic changed between the Last Glacial Maximum (LGM) and the pre-industrial (PI), with some regions, mainly in the tropics, of the LGM ocean lacking good thermal analogues in the PI. Transfer functions calibrated against different depths reconstruct a marked subsurface cooling in parts of the tropical North Atlantic during the last glacial, in contrast to previous studies that reconstruct only a modest cooling. These possible biases in temperature reconstructions may affect estimates of climate sensitivity based on the difference between LGM and pre-industrial climate. Quantifying these biases has the potential to alter our understanding of LGM climate and improve estimates of climate sensitivity. |
format |
Article in Journal/Newspaper |
author |
Telford, R. J. Li, C. Kucera, M. |
spellingShingle |
Telford, R. J. Li, C. Kucera, M. Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions |
author_facet |
Telford, R. J. Li, C. Kucera, M. |
author_sort |
Telford, R. J. |
title |
Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions |
title_short |
Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions |
title_full |
Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions |
title_fullStr |
Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions |
title_full_unstemmed |
Mismatch between the depth habitat of planktonic foraminifera and the calibration depth of SST transfer functions may bias reconstructions |
title_sort |
mismatch between the depth habitat of planktonic foraminifera and the calibration depth of sst transfer functions may bias reconstructions |
publisher |
Copernicus Gesellschaft Mbh |
publishDate |
2013 |
url |
https://archimer.ifremer.fr/doc/00181/29202/27585.pdf https://doi.org/10.5194/cp-9-859-2013 https://archimer.ifremer.fr/doc/00181/29202/ |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
Climate Of The Past (1814-9324) (Copernicus Gesellschaft Mbh), 2013 , Vol. 9 , N. 2 , P. 859-870 |
op_relation |
https://archimer.ifremer.fr/doc/00181/29202/27585.pdf doi:10.5194/cp-9-859-2013 https://archimer.ifremer.fr/doc/00181/29202/ |
op_rights |
Author(s) 2013. CC Attribution 3.0 License info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5194/cp-9-859-2013 |
container_title |
Climate of the Past |
container_volume |
9 |
container_issue |
2 |
container_start_page |
859 |
op_container_end_page |
870 |
_version_ |
1766120972956467200 |