Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial

Chris S.M. Turney; Richard T. Jones; Steven J. Phipps; Zoë Thomas; Alan Hogg; A. Peter Kershaw; Christopher J. Fogwill; Jonathan Palmer; Christopher Bronk Ramsey; Florian Adolphi; Raimund Muscheler; Konrad A. Hughen; Richard A. Staff; Mark Grosvenor; Nicholas R. Golledge; Sune Olander Rasmussen; David K. Hutchinson; Simon Haberle; Andrew Lorrey; Gretel Boswijk; Alan Cooper

doi:10.1038/s41467-017-00577-6

Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial

Chris S.M. Turney^*, Richard T. Jones, Steven J. Phipps, Zoë Thomas, Alan Hogg, A. Peter Kershaw, Christopher J. Fogwill, Jonathan Palmer, Christopher Bronk Ramsey, Florian Adolphi, Raimund Muscheler, Konrad A. Hughen, Richard A. Staff, Mark Grosvenor, Nicholas R. Golledge, Sune Olander Rasmussen, David K. Hutchinson, Simon Haberle, Andrew Lorrey, Gretel BoswijkAlan Cooper

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the 'bipolar seesaw'). Here we exploit a bidecadally resolved ¹⁴C data set obtained from New Zealand kauri (Agathis australis) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment ¹⁴C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train.

Original language	English
Article number	520
Journal	Nature Communications
Volume	8
Issue number	1
DOIs	https://doi.org/10.1038/s41467-017-00577-6
Publication status	Published - 1 Dec 2017
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Biochemistry,Genetics and Molecular Biology
General Physics and Astronomy

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10.1038/s41467-017-00577-6

Cite this

Turney, C. S. M., Jones, R. T., Phipps, S. J., Thomas, Z., Hogg, A., Kershaw, A. P., Fogwill, C. J., Palmer, J., Bronk Ramsey, C., Adolphi, F., Muscheler, R., Hughen, K. A., Staff, R. A., Grosvenor, M., Golledge, N. R., Rasmussen, S. O., Hutchinson, D. K., Haberle, S., Lorrey, A., ... Cooper, A. (2017). Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial. Nature Communications, 8(1), Article 520. https://doi.org/10.1038/s41467-017-00577-6

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title = "Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial",

abstract = "Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the 'bipolar seesaw'). Here we exploit a bidecadally resolved 14C data set obtained from New Zealand kauri (Agathis australis) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train.",

author = "Turney, {Chris S.M.} and Jones, {Richard T.} and Phipps, {Steven J.} and Zo{\"e} Thomas and Alan Hogg and Kershaw, {A. Peter} and Fogwill, {Christopher J.} and Jonathan Palmer and {Bronk Ramsey}, Christopher and Florian Adolphi and Raimund Muscheler and Hughen, {Konrad A.} and Staff, {Richard A.} and Mark Grosvenor and Golledge, {Nicholas R.} and Rasmussen, {Sune Olander} and Hutchinson, {David K.} and Simon Haberle and Andrew Lorrey and Gretel Boswijk and Alan Cooper",

note = "Publisher Copyright: {\textcopyright} 2017 The Author(s).",

year = "2017",

month = dec,

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doi = "10.1038/s41467-017-00577-6",

language = "English",

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Turney, CSM, Jones, RT, Phipps, SJ, Thomas, Z, Hogg, A, Kershaw, AP, Fogwill, CJ, Palmer, J, Bronk Ramsey, C, Adolphi, F, Muscheler, R, Hughen, KA, Staff, RA, Grosvenor, M, Golledge, NR, Rasmussen, SO, Hutchinson, DK, Haberle, S, Lorrey, A, Boswijk, G & Cooper, A 2017, 'Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial', Nature Communications, vol. 8, no. 1, 520. https://doi.org/10.1038/s41467-017-00577-6

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T1 - Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial

AU - Turney, Chris S.M.

AU - Jones, Richard T.

AU - Phipps, Steven J.

AU - Thomas, Zoë

AU - Hogg, Alan

AU - Kershaw, A. Peter

AU - Fogwill, Christopher J.

AU - Palmer, Jonathan

AU - Bronk Ramsey, Christopher

AU - Adolphi, Florian

AU - Muscheler, Raimund

AU - Hughen, Konrad A.

AU - Staff, Richard A.

AU - Grosvenor, Mark

AU - Golledge, Nicholas R.

AU - Rasmussen, Sune Olander

AU - Hutchinson, David K.

AU - Haberle, Simon

AU - Lorrey, Andrew

AU - Boswijk, Gretel

AU - Cooper, Alan

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the 'bipolar seesaw'). Here we exploit a bidecadally resolved 14C data set obtained from New Zealand kauri (Agathis australis) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train.

AB - Contrasting Greenland and Antarctic temperatures during the last glacial period (115,000 to 11,650 years ago) are thought to have been driven by imbalances in the rates of formation of North Atlantic and Antarctic Deep Water (the 'bipolar seesaw'). Here we exploit a bidecadally resolved 14C data set obtained from New Zealand kauri (Agathis australis) to undertake high-precision alignment of key climate data sets spanning iceberg-rafted debris event Heinrich 3 and Greenland Interstadial (GI) 5.1 in the North Atlantic (~30,400 to 28,400 years ago). We observe no divergence between the kauri and Atlantic marine sediment 14C data sets, implying limited changes in deep water formation. However, a Southern Ocean (Atlantic-sector) iceberg rafted debris event appears to have occurred synchronously with GI-5.1 warming and decreased precipitation over the western equatorial Pacific and Atlantic. An ensemble of transient meltwater simulations shows that Antarctic-sourced salinity anomalies can generate climate changes that are propagated globally via an atmospheric Rossby wave train.

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U2 - 10.1038/s41467-017-00577-6

DO - 10.1038/s41467-017-00577-6

M3 - Article

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AN - SCOPUS:85029301605

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VL - 8

JO - Nature Communications

JF - Nature Communications

IS - 1

M1 - 520

ER -

Rapid global ocean-atmosphere response to Southern Ocean freshening during the last glacial

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