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Assessment and calibration of TEX86 paleothermometry in the Sea of Okhotsk and sub-polar North Pacific region: implications for paleoceanography

Assessment and calibration of TEX86 paleothermometry in the Sea of Okhotsk and sub-polar North Pacific region: implications for paleoceanography
Assessment and calibration of TEX86 paleothermometry in the Sea of Okhotsk and sub-polar North Pacific region: implications for paleoceanography
We measured TEX86 indices in surface sediments and sediment cores from marginal seas and open ocean sites in the North Pacific to test the accuracy of TEX86 paleothermometry in the region. Application of the global core top TEX86L and TEX86H calibrations in the Sea of Okhotsk and northern North Pacific sub-polar region results in over- and under-estimations of TEX86 derived SSTs in surface sediments in deep-ocean and coastal areas, respectively. Further challenges apparent in applying TEX86L and TEX86H in late Quaternary sediment cores from the Okhotsk Sea (MR06-04 PC7) and northwestern Pacific (MR00-K03 PC1) are unrealistically warm Holocene mean annual reconstructed temperatures (TEX86L) and excessively cold Glacial temperatures (TEX86H), compared with other high-latitude records and climate models. Application of a calibration based on a sub-set of deep (
0079-6611
254-266
Seki, Osamu
b60cb418-d66f-49a8-acec-caa9ec2440a1
Bendle, James A.
e506d1cd-4b05-4a83-9496-b71e0f873216
Harada, Naomi
ebeceec3-7f68-4d91-92d4-dbdc8ad8a663
Kobayashi, Madoka
52879bce-b3b1-4398-9f6e-cd29ed8eeabd
Sawada, Ken
e97b2d93-43d5-4e3c-a71e-f751082a982e
Moossen, Heiko
51ca5f42-77b0-491d-99cb-58437d58b15a
Inglis, Gordon N.
1651196d-916c-43cb-b5a0-9b3ecaf5d664
Nagao, Seiya
f4657c4a-2b56-4947-8716-ad767357d561
Sakamoto, Tatsuhiko
686c064a-33a3-4067-8337-26609971ed3d
Seki, Osamu
b60cb418-d66f-49a8-acec-caa9ec2440a1
Bendle, James A.
e506d1cd-4b05-4a83-9496-b71e0f873216
Harada, Naomi
ebeceec3-7f68-4d91-92d4-dbdc8ad8a663
Kobayashi, Madoka
52879bce-b3b1-4398-9f6e-cd29ed8eeabd
Sawada, Ken
e97b2d93-43d5-4e3c-a71e-f751082a982e
Moossen, Heiko
51ca5f42-77b0-491d-99cb-58437d58b15a
Inglis, Gordon N.
1651196d-916c-43cb-b5a0-9b3ecaf5d664
Nagao, Seiya
f4657c4a-2b56-4947-8716-ad767357d561
Sakamoto, Tatsuhiko
686c064a-33a3-4067-8337-26609971ed3d

Seki, Osamu, Bendle, James A., Harada, Naomi, Kobayashi, Madoka, Sawada, Ken, Moossen, Heiko, Inglis, Gordon N., Nagao, Seiya and Sakamoto, Tatsuhiko (2014) Assessment and calibration of TEX86 paleothermometry in the Sea of Okhotsk and sub-polar North Pacific region: implications for paleoceanography. Progress in Oceanography, 126, 254-266. (doi:10.1016/j.pocean.2014.04.013).

Record type: Article

Abstract

We measured TEX86 indices in surface sediments and sediment cores from marginal seas and open ocean sites in the North Pacific to test the accuracy of TEX86 paleothermometry in the region. Application of the global core top TEX86L and TEX86H calibrations in the Sea of Okhotsk and northern North Pacific sub-polar region results in over- and under-estimations of TEX86 derived SSTs in surface sediments in deep-ocean and coastal areas, respectively. Further challenges apparent in applying TEX86L and TEX86H in late Quaternary sediment cores from the Okhotsk Sea (MR06-04 PC7) and northwestern Pacific (MR00-K03 PC1) are unrealistically warm Holocene mean annual reconstructed temperatures (TEX86L) and excessively cold Glacial temperatures (TEX86H), compared with other high-latitude records and climate models. Application of a calibration based on a sub-set of deep (

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e-pub ahead of print date: April 2014
Published date: August 2014

Identifiers

Local EPrints ID: 437538
URI: http://eprints.soton.ac.uk/id/eprint/437538
ISSN: 0079-6611
PURE UUID: 9091932f-478d-40c8-8f3e-103d4292a03a
ORCID for Gordon N. Inglis: ORCID iD orcid.org/0000-0002-0032-4668

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Date deposited: 04 Feb 2020 17:30
Last modified: 17 Mar 2024 04:00

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Contributors

Author: Osamu Seki
Author: James A. Bendle
Author: Naomi Harada
Author: Madoka Kobayashi
Author: Ken Sawada
Author: Heiko Moossen
Author: Seiya Nagao
Author: Tatsuhiko Sakamoto

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