Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 30 (2015): 1470-1489, doi:10.1002/2014PA002743. The ocean circulation modifie...
Published in: | Paleoceanography |
---|---|
Main Authors: | , , , |
Format: | Report |
Language: | English |
Published: |
John Wiley & Sons
2015
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/7807 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7807 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7807 2023-05-15T18:01:03+02:00 Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation Amrhein, Daniel E. Gebbie, Geoffrey A. Marchal, Olivier Wunsch, Carl 2015-11-12 https://hdl.handle.net/1912/7807 en_US eng John Wiley & Sons https://doi.org/10.1002/2014PA002743 Paleoceanography 30 (2015): 1470-1489 https://hdl.handle.net/1912/7807 doi:10.1002/2014PA002743 Paleoceanography 30 (2015): 1470-1489 doi:10.1002/2014PA002743 Oxygen isotopes Inverse modeling Deglaciation Tracers Ocean circulation Green's function Preprint 2015 ftwhoas https://doi.org/10.1002/2014PA002743 2022-05-28T22:59:30Z Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 30 (2015): 1470-1489, doi:10.1002/2014PA002743. The ocean circulation modifies mixed layer (ML) tracer signals as they are communicated to the deep ocean by advection and mixing. We develop and apply a procedure for using tracer signals observed “upstream” (by planktonic foraminifera) and “downstream” (by benthic foraminifera) to constrain how tracer signals are modified by the intervening circulation and, by extension, to constrain properties of that circulation. A history of ML equilibrium calcite δ18O (δ18Oc) spanning the last deglaciation is inferred from a least-squares fit of eight benthic foraminiferal δ18Oc records to Green's function estimated for the modern ocean circulation. Disagreements between this history and the ML history implied by planktonic records would indicate deviations from the modern circulation. No deviations are diagnosed because the two estimates of ML δ18Oc agree within their uncertainties, but we suggest data collection and modeling procedures useful for inferring circulation changes in future studies. Uncertainties of benthic-derived ML δ18Oc are lowest in the high-latitude regions chiefly responsible for ventilating the deep ocean; additional high-resolution planktonic records constraining these regions are of particular utility. Benthic records from the Southern Ocean, where data are sparse, appear to have the most power to reduce uncertainties in benthic-derived ML δ18Oc. Understanding the spatiotemporal covariance of deglacial ML δ18Oc will also improve abilities of δ18Oc records to constrain deglacial circulation. 2016-05-12 Report Planktonic foraminifera Southern Ocean Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Southern Ocean Paleoceanography 30 11 1470 1489 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Oxygen isotopes Inverse modeling Deglaciation Tracers Ocean circulation Green's function |
spellingShingle |
Oxygen isotopes Inverse modeling Deglaciation Tracers Ocean circulation Green's function Amrhein, Daniel E. Gebbie, Geoffrey A. Marchal, Olivier Wunsch, Carl Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
topic_facet |
Oxygen isotopes Inverse modeling Deglaciation Tracers Ocean circulation Green's function |
description |
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 30 (2015): 1470-1489, doi:10.1002/2014PA002743. The ocean circulation modifies mixed layer (ML) tracer signals as they are communicated to the deep ocean by advection and mixing. We develop and apply a procedure for using tracer signals observed “upstream” (by planktonic foraminifera) and “downstream” (by benthic foraminifera) to constrain how tracer signals are modified by the intervening circulation and, by extension, to constrain properties of that circulation. A history of ML equilibrium calcite δ18O (δ18Oc) spanning the last deglaciation is inferred from a least-squares fit of eight benthic foraminiferal δ18Oc records to Green's function estimated for the modern ocean circulation. Disagreements between this history and the ML history implied by planktonic records would indicate deviations from the modern circulation. No deviations are diagnosed because the two estimates of ML δ18Oc agree within their uncertainties, but we suggest data collection and modeling procedures useful for inferring circulation changes in future studies. Uncertainties of benthic-derived ML δ18Oc are lowest in the high-latitude regions chiefly responsible for ventilating the deep ocean; additional high-resolution planktonic records constraining these regions are of particular utility. Benthic records from the Southern Ocean, where data are sparse, appear to have the most power to reduce uncertainties in benthic-derived ML δ18Oc. Understanding the spatiotemporal covariance of deglacial ML δ18Oc will also improve abilities of δ18Oc records to constrain deglacial circulation. 2016-05-12 |
format |
Report |
author |
Amrhein, Daniel E. Gebbie, Geoffrey A. Marchal, Olivier Wunsch, Carl |
author_facet |
Amrhein, Daniel E. Gebbie, Geoffrey A. Marchal, Olivier Wunsch, Carl |
author_sort |
Amrhein, Daniel E. |
title |
Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
title_short |
Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
title_full |
Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
title_fullStr |
Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
title_full_unstemmed |
Inferring surface water equilibrium calcite δ18O during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
title_sort |
inferring surface water equilibrium calcite δ18o during the last deglacial period from benthic foraminiferal records : implications for ocean circulation |
publisher |
John Wiley & Sons |
publishDate |
2015 |
url |
https://hdl.handle.net/1912/7807 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Planktonic foraminifera Southern Ocean |
genre_facet |
Planktonic foraminifera Southern Ocean |
op_source |
Paleoceanography 30 (2015): 1470-1489 doi:10.1002/2014PA002743 |
op_relation |
https://doi.org/10.1002/2014PA002743 Paleoceanography 30 (2015): 1470-1489 https://hdl.handle.net/1912/7807 doi:10.1002/2014PA002743 |
op_doi |
https://doi.org/10.1002/2014PA002743 |
container_title |
Paleoceanography |
container_volume |
30 |
container_issue |
11 |
container_start_page |
1470 |
op_container_end_page |
1489 |
_version_ |
1766170372211736576 |