Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal

Christopher J. Fogwill; Chris Turney; Laurie Menviel; Andy Baker; Michael E. Weber; Bethany Ellis; Zoë A. Thomas; Nick R. Golledge; David Etheridge; Mauro Rubino; David P. Thornton; Tas D. van Ommen; Andrew D. Moy; S. Davies; Michael I. Bird; Niels C. Munksgaard; Camilla M. Rootes; Helen Millman; Juee Vohra; Andres Rivera; A. Mackintosh; J. Pike; Ian R. Hall; E. A. Bagshaw; Eleanor B. Rainsley; Christopher Bronk Ramsey; M. Montinari; A. G. Cage; M. R. P. Harris; R. Jones; A. Power; Jason B. Love; J. Young; Laura S. Weyrich; Alan Cooper

doi:10.31223/OSF.IO/64MVE

Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal

Christopher J. Fogwill^*, Chris Turney, Laurie Menviel, Andy Baker, Michael E. Weber, Bethany Ellis, Zoë A. Thomas, Nick R. Golledge, David Etheridge, Mauro Rubino, David P. Thornton, Tas D. van Ommen, Andrew D. Moy, S. Davies, Michael I. Bird, Niels C. Munksgaard, Camilla M. Rootes, Helen Millman, Juee Vohra, Andres RiveraA. Mackintosh, J. Pike, Ian R. Hall, E. A. Bagshaw, Eleanor B. Rainsley, Christopher Bronk Ramsey, M. Montinari, A. G. Cage, M. R. P. Harris, R. Jones, A. Power, Jason B. Love, J. Young, Laura S. Weyrich, Alan Cooper

^*Corresponding author for this work

School of Engineering & Physical Sciences

Research output: Working paper › Preprint

Abstract

Determining the feedbacks that modulate Southern Ocean carbon dynamics is key to understanding past and future climate. The global pause in rising atmospheric CO2 during the period of mid- to high-latitude southern surface cooling known as the Antarctic Cold Reversal (ACR, 14,700-12,700 years ago) provides an opportunity to disentangle competing influences. We present highly-resolved and precisely-aligned ice and marine reconstructions that capture a previously unrecognized increase in microbial diversity and ocean primary productivity during the ACR. Transient climate modeling across the last glacial suggests this period corresponds to a maximum seasonal difference in sea-ice extent. Our results indicate that this increased seasonal sea-ice variability drove changes in high-latitude light, temperature and nutrient availability, turning the southern seasonal sea-ice zone into a globally significant carbon sink.

Original language	English
Publisher	EarthArXiv
DOIs	https://doi.org/10.31223/OSF.IO/64MVE
Publication status	Published - 24 May 2019

Keywords

Antarctica
Antarctic Cold
Reversal
Blue Ice Areas
ice core biomakers
Last Glacial Transition
sea ice-carbon feedbacks
Southern Hemisphere Westerlies

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Fogwill, C. J., Turney, C., Menviel, L., Baker, A., Weber, M. E., Ellis, B., Thomas, Z. A., Golledge, N. R., Etheridge, D., Rubino, M., Thornton, D. P., van Ommen, T. D., Moy, A. D., Davies, S., Bird, M. I., Munksgaard, N. C., Rootes, C. M., Millman, H., Vohra, J., ... Cooper, A. (2019). Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal. EarthArXiv. https://doi.org/10.31223/OSF.IO/64MVE

@techreport{a5bba2eabc9d48faa3269e675e97acf7,

title = "Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal",

abstract = "Determining the feedbacks that modulate Southern Ocean carbon dynamics is key to understanding past and future climate. The global pause in rising atmospheric CO2 during the period of mid- to high-latitude southern surface cooling known as the Antarctic Cold Reversal (ACR, 14,700-12,700 years ago) provides an opportunity to disentangle competing influences. We present highly-resolved and precisely-aligned ice and marine reconstructions that capture a previously unrecognized increase in microbial diversity and ocean primary productivity during the ACR. Transient climate modeling across the last glacial suggests this period corresponds to a maximum seasonal difference in sea-ice extent. Our results indicate that this increased seasonal sea-ice variability drove changes in high-latitude light, temperature and nutrient availability, turning the southern seasonal sea-ice zone into a globally significant carbon sink.",

keywords = "Antarctica, Antarctic Cold, Reversal, Blue Ice Areas, ice core biomakers, Last Glacial Transition, sea ice-carbon feedbacks, Southern Hemisphere Westerlies",

author = "Fogwill, \{Christopher J.\} and Chris Turney and Laurie Menviel and Andy Baker and Weber, \{Michael E.\} and Bethany Ellis and Thomas, \{Zo{\"e} A.\} and Golledge, \{Nick R.\} and David Etheridge and Mauro Rubino and Thornton, \{David P.\} and \{van Ommen\}, \{Tas D.\} and Moy, \{Andrew D.\} and S. Davies and Bird, \{Michael I.\} and Munksgaard, \{Niels C.\} and Rootes, \{Camilla M.\} and Helen Millman and Juee Vohra and Andres Rivera and A. Mackintosh and J. Pike and Hall, \{Ian R.\} and Bagshaw, \{E. A.\} and Rainsley, \{Eleanor B.\} and \{Bronk Ramsey\}, Christopher and M. Montinari and Cage, \{A. G.\} and Harris, \{M. R. P.\} and R. Jones and A. Power and Love, \{Jason B.\} and J. Young and Weyrich, \{Laura S.\} and Alan Cooper",

year = "2019",

month = may,

day = "24",

doi = "10.31223/OSF.IO/64MVE",

language = "English",

publisher = "EarthArXiv",

type = "WorkingPaper",

institution = "EarthArXiv",

}

Fogwill, CJ, Turney, C, Menviel, L, Baker, A, Weber, ME, Ellis, B, Thomas, ZA, Golledge, NR, Etheridge, D, Rubino, M, Thornton, DP, van Ommen, TD, Moy, AD, Davies, S, Bird, MI, Munksgaard, NC, Rootes, CM, Millman, H, Vohra, J, Rivera, A, Mackintosh, A, Pike, J, Hall, IR, Bagshaw, EA, Rainsley, EB, Bronk Ramsey, C, Montinari, M, Cage, AG, Harris, MRP, Jones, R, Power, A, Love, JB, Young, J, Weyrich, LS & Cooper, A 2019 'Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal' EarthArXiv. https://doi.org/10.31223/OSF.IO/64MVE

TY - UNPB

T1 - Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal

AU - Fogwill, Christopher J.

AU - Turney, Chris

AU - Menviel, Laurie

AU - Baker, Andy

AU - Weber, Michael E.

AU - Ellis, Bethany

AU - Thomas, Zoë A.

AU - Golledge, Nick R.

AU - Etheridge, David

AU - Rubino, Mauro

AU - Thornton, David P.

AU - van Ommen, Tas D.

AU - Moy, Andrew D.

AU - Davies, S.

AU - Bird, Michael I.

AU - Munksgaard, Niels C.

AU - Rootes, Camilla M.

AU - Millman, Helen

AU - Vohra, Juee

AU - Rivera, Andres

AU - Mackintosh, A.

AU - Pike, J.

AU - Hall, Ian R.

AU - Bagshaw, E. A.

AU - Rainsley, Eleanor B.

AU - Bronk Ramsey, Christopher

AU - Montinari, M.

AU - Cage, A. G.

AU - Harris, M. R. P.

AU - Jones, R.

AU - Power, A.

AU - Love, Jason B.

AU - Young, J.

AU - Weyrich, Laura S.

AU - Cooper, Alan

PY - 2019/5/24

Y1 - 2019/5/24

N2 - Determining the feedbacks that modulate Southern Ocean carbon dynamics is key to understanding past and future climate. The global pause in rising atmospheric CO2 during the period of mid- to high-latitude southern surface cooling known as the Antarctic Cold Reversal (ACR, 14,700-12,700 years ago) provides an opportunity to disentangle competing influences. We present highly-resolved and precisely-aligned ice and marine reconstructions that capture a previously unrecognized increase in microbial diversity and ocean primary productivity during the ACR. Transient climate modeling across the last glacial suggests this period corresponds to a maximum seasonal difference in sea-ice extent. Our results indicate that this increased seasonal sea-ice variability drove changes in high-latitude light, temperature and nutrient availability, turning the southern seasonal sea-ice zone into a globally significant carbon sink.

AB - Determining the feedbacks that modulate Southern Ocean carbon dynamics is key to understanding past and future climate. The global pause in rising atmospheric CO2 during the period of mid- to high-latitude southern surface cooling known as the Antarctic Cold Reversal (ACR, 14,700-12,700 years ago) provides an opportunity to disentangle competing influences. We present highly-resolved and precisely-aligned ice and marine reconstructions that capture a previously unrecognized increase in microbial diversity and ocean primary productivity during the ACR. Transient climate modeling across the last glacial suggests this period corresponds to a maximum seasonal difference in sea-ice extent. Our results indicate that this increased seasonal sea-ice variability drove changes in high-latitude light, temperature and nutrient availability, turning the southern seasonal sea-ice zone into a globally significant carbon sink.

KW - Antarctica

KW - Antarctic Cold

KW - Reversal

KW - Blue Ice Areas

KW - ice core biomakers

KW - Last Glacial Transition

KW - sea ice-carbon feedbacks

KW - Southern Hemisphere Westerlies

U2 - 10.31223/OSF.IO/64MVE

DO - 10.31223/OSF.IO/64MVE

M3 - Preprint

BT - Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal

PB - EarthArXiv

ER -

Marine biomarkers from ice cores reveal enhanced high-latitude Southern Ocean carbon sink during the Antarctic Cold Reversal

Abstract

Keywords

UN SDGs

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