Onset of deglacial warming in West Antarctica driven by local orbital forcing

T. J. Fudge, Eric J. Steig, Bradley R. Markle, Spruce W. Schoenemann, Qinghua Ding, Kendrick C. Taylor, Joseph R. McConnell, Edward J. Brook, Todd Anthony Sowers, James W.C. White, Richard B. Alley, Hai Cheng, Gary D. Clow, Jihong Cole-Dai, Howard Conway, Kurt M. Cuffey, Jon S. Edwards, R. Lawrence Edwards, Ross Edwards, John M. Fegyveresi & 22 others David Ferris, Joan J. Fitzpatrick, Jay Johnson, Geoffrey Hargreaves, James E. Lee, Olivia J. Maselli, William Mason, Kenneth C. McGwire, Logan E. Mitchell, Nicolai Mortensen, Peter Neff, Anais J. Orsi, Trevor J. Popp, Andrew J. Schauer, Jeffrey P. Severinghaus, Michael Sigl, Matthew K. Spencer, Bruce H. Vaughn, Donald Edward Voigt, Edwin D. Waddington, Xianfeng Wang, Gifford J. Wong

Research output: Contribution to journalArticle

146 Citations (Scopus)

Abstract

The cause of warming in the Southern Hemisphere during the most recent deglaciation remains a matter of debate. Hypotheses for a Northern Hemisphere trigger, through oceanic redistributions of heat, are based in part on the abrupt onset of warming seen in East Antarctic ice cores and dated to 18,000 years ago, which is several thousand years after high-latitude Northern Hemisphere summer insolation intensity began increasing from its minimum, approximately 24,000 years ago. An alternative explanation is that local solar insolation changes cause the Southern Hemisphere to warm independently. Here we present results from a new, annually resolved ice-core record from West Antarctica that reconciles these two views. The records show that 18,000 years ago snow accumulation in West Antarctica began increasing, coincident with increasing carbon dioxide concentrations, warming in East Antarctica and cooling in the Northern Hemisphere associated with an abrupt decrease in Atlantic meridional overturning circulation. However, significant warming in West Antarctica began at least 2,000 years earlier. Circum-Antarctic sea-ice decline, driven by increasing local insolation, is the likely cause of this warming. The marine-influenced West Antarctic records suggest a more active role for the Southern Ocean in the onset of deglaciation than is inferred from ice cores in the East Antarctic interior, which are largely isolated from sea-ice changes.

Original languageEnglish (US)
Pages (from-to)440-444
Number of pages5
JournalNature
Volume500
Issue number7463
DOIs
StatePublished - Aug 15 2013

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Ice
Ice Cover
Snow
Carbon Dioxide
Oceans and Seas
Hot Temperature

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Fudge, T. J., Steig, E. J., Markle, B. R., Schoenemann, S. W., Ding, Q., Taylor, K. C., ... Wong, G. J. (2013). Onset of deglacial warming in West Antarctica driven by local orbital forcing. Nature, 500(7463), 440-444. https://doi.org/10.1038/nature12376
Fudge, T. J. ; Steig, Eric J. ; Markle, Bradley R. ; Schoenemann, Spruce W. ; Ding, Qinghua ; Taylor, Kendrick C. ; McConnell, Joseph R. ; Brook, Edward J. ; Sowers, Todd Anthony ; White, James W.C. ; Alley, Richard B. ; Cheng, Hai ; Clow, Gary D. ; Cole-Dai, Jihong ; Conway, Howard ; Cuffey, Kurt M. ; Edwards, Jon S. ; Lawrence Edwards, R. ; Edwards, Ross ; Fegyveresi, John M. ; Ferris, David ; Fitzpatrick, Joan J. ; Johnson, Jay ; Hargreaves, Geoffrey ; Lee, James E. ; Maselli, Olivia J. ; Mason, William ; McGwire, Kenneth C. ; Mitchell, Logan E. ; Mortensen, Nicolai ; Neff, Peter ; Orsi, Anais J. ; Popp, Trevor J. ; Schauer, Andrew J. ; Severinghaus, Jeffrey P. ; Sigl, Michael ; Spencer, Matthew K. ; Vaughn, Bruce H. ; Voigt, Donald Edward ; Waddington, Edwin D. ; Wang, Xianfeng ; Wong, Gifford J. / Onset of deglacial warming in West Antarctica driven by local orbital forcing. In: Nature. 2013 ; Vol. 500, No. 7463. pp. 440-444.
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abstract = "The cause of warming in the Southern Hemisphere during the most recent deglaciation remains a matter of debate. Hypotheses for a Northern Hemisphere trigger, through oceanic redistributions of heat, are based in part on the abrupt onset of warming seen in East Antarctic ice cores and dated to 18,000 years ago, which is several thousand years after high-latitude Northern Hemisphere summer insolation intensity began increasing from its minimum, approximately 24,000 years ago. An alternative explanation is that local solar insolation changes cause the Southern Hemisphere to warm independently. Here we present results from a new, annually resolved ice-core record from West Antarctica that reconciles these two views. The records show that 18,000 years ago snow accumulation in West Antarctica began increasing, coincident with increasing carbon dioxide concentrations, warming in East Antarctica and cooling in the Northern Hemisphere associated with an abrupt decrease in Atlantic meridional overturning circulation. However, significant warming in West Antarctica began at least 2,000 years earlier. Circum-Antarctic sea-ice decline, driven by increasing local insolation, is the likely cause of this warming. The marine-influenced West Antarctic records suggest a more active role for the Southern Ocean in the onset of deglaciation than is inferred from ice cores in the East Antarctic interior, which are largely isolated from sea-ice changes.",
author = "Fudge, {T. J.} and Steig, {Eric J.} and Markle, {Bradley R.} and Schoenemann, {Spruce W.} and Qinghua Ding and Taylor, {Kendrick C.} and McConnell, {Joseph R.} and Brook, {Edward J.} and Sowers, {Todd Anthony} and White, {James W.C.} and Alley, {Richard B.} and Hai Cheng and Clow, {Gary D.} and Jihong Cole-Dai and Howard Conway and Cuffey, {Kurt M.} and Edwards, {Jon S.} and {Lawrence Edwards}, R. and Ross Edwards and Fegyveresi, {John M.} and David Ferris and Fitzpatrick, {Joan J.} and Jay Johnson and Geoffrey Hargreaves and Lee, {James E.} and Maselli, {Olivia J.} and William Mason and McGwire, {Kenneth C.} and Mitchell, {Logan E.} and Nicolai Mortensen and Peter Neff and Orsi, {Anais J.} and Popp, {Trevor J.} and Schauer, {Andrew J.} and Severinghaus, {Jeffrey P.} and Michael Sigl and Spencer, {Matthew K.} and Vaughn, {Bruce H.} and Voigt, {Donald Edward} and Waddington, {Edwin D.} and Xianfeng Wang and Wong, {Gifford J.}",
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Fudge, TJ, Steig, EJ, Markle, BR, Schoenemann, SW, Ding, Q, Taylor, KC, McConnell, JR, Brook, EJ, Sowers, TA, White, JWC, Alley, RB, Cheng, H, Clow, GD, Cole-Dai, J, Conway, H, Cuffey, KM, Edwards, JS, Lawrence Edwards, R, Edwards, R, Fegyveresi, JM, Ferris, D, Fitzpatrick, JJ, Johnson, J, Hargreaves, G, Lee, JE, Maselli, OJ, Mason, W, McGwire, KC, Mitchell, LE, Mortensen, N, Neff, P, Orsi, AJ, Popp, TJ, Schauer, AJ, Severinghaus, JP, Sigl, M, Spencer, MK, Vaughn, BH, Voigt, DE, Waddington, ED, Wang, X & Wong, GJ 2013, 'Onset of deglacial warming in West Antarctica driven by local orbital forcing', Nature, vol. 500, no. 7463, pp. 440-444. https://doi.org/10.1038/nature12376

Onset of deglacial warming in West Antarctica driven by local orbital forcing. / Fudge, T. J.; Steig, Eric J.; Markle, Bradley R.; Schoenemann, Spruce W.; Ding, Qinghua; Taylor, Kendrick C.; McConnell, Joseph R.; Brook, Edward J.; Sowers, Todd Anthony; White, James W.C.; Alley, Richard B.; Cheng, Hai; Clow, Gary D.; Cole-Dai, Jihong; Conway, Howard; Cuffey, Kurt M.; Edwards, Jon S.; Lawrence Edwards, R.; Edwards, Ross; Fegyveresi, John M.; Ferris, David; Fitzpatrick, Joan J.; Johnson, Jay; Hargreaves, Geoffrey; Lee, James E.; Maselli, Olivia J.; Mason, William; McGwire, Kenneth C.; Mitchell, Logan E.; Mortensen, Nicolai; Neff, Peter; Orsi, Anais J.; Popp, Trevor J.; Schauer, Andrew J.; Severinghaus, Jeffrey P.; Sigl, Michael; Spencer, Matthew K.; Vaughn, Bruce H.; Voigt, Donald Edward; Waddington, Edwin D.; Wang, Xianfeng; Wong, Gifford J.

In: Nature, Vol. 500, No. 7463, 15.08.2013, p. 440-444.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Onset of deglacial warming in West Antarctica driven by local orbital forcing

AU - Fudge, T. J.

AU - Steig, Eric J.

AU - Markle, Bradley R.

AU - Schoenemann, Spruce W.

AU - Ding, Qinghua

AU - Taylor, Kendrick C.

AU - McConnell, Joseph R.

AU - Brook, Edward J.

AU - Sowers, Todd Anthony

AU - White, James W.C.

AU - Alley, Richard B.

AU - Cheng, Hai

AU - Clow, Gary D.

AU - Cole-Dai, Jihong

AU - Conway, Howard

AU - Cuffey, Kurt M.

AU - Edwards, Jon S.

AU - Lawrence Edwards, R.

AU - Edwards, Ross

AU - Fegyveresi, John M.

AU - Ferris, David

AU - Fitzpatrick, Joan J.

AU - Johnson, Jay

AU - Hargreaves, Geoffrey

AU - Lee, James E.

AU - Maselli, Olivia J.

AU - Mason, William

AU - McGwire, Kenneth C.

AU - Mitchell, Logan E.

AU - Mortensen, Nicolai

AU - Neff, Peter

AU - Orsi, Anais J.

AU - Popp, Trevor J.

AU - Schauer, Andrew J.

AU - Severinghaus, Jeffrey P.

AU - Sigl, Michael

AU - Spencer, Matthew K.

AU - Vaughn, Bruce H.

AU - Voigt, Donald Edward

AU - Waddington, Edwin D.

AU - Wang, Xianfeng

AU - Wong, Gifford J.

PY - 2013/8/15

Y1 - 2013/8/15

N2 - The cause of warming in the Southern Hemisphere during the most recent deglaciation remains a matter of debate. Hypotheses for a Northern Hemisphere trigger, through oceanic redistributions of heat, are based in part on the abrupt onset of warming seen in East Antarctic ice cores and dated to 18,000 years ago, which is several thousand years after high-latitude Northern Hemisphere summer insolation intensity began increasing from its minimum, approximately 24,000 years ago. An alternative explanation is that local solar insolation changes cause the Southern Hemisphere to warm independently. Here we present results from a new, annually resolved ice-core record from West Antarctica that reconciles these two views. The records show that 18,000 years ago snow accumulation in West Antarctica began increasing, coincident with increasing carbon dioxide concentrations, warming in East Antarctica and cooling in the Northern Hemisphere associated with an abrupt decrease in Atlantic meridional overturning circulation. However, significant warming in West Antarctica began at least 2,000 years earlier. Circum-Antarctic sea-ice decline, driven by increasing local insolation, is the likely cause of this warming. The marine-influenced West Antarctic records suggest a more active role for the Southern Ocean in the onset of deglaciation than is inferred from ice cores in the East Antarctic interior, which are largely isolated from sea-ice changes.

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Fudge TJ, Steig EJ, Markle BR, Schoenemann SW, Ding Q, Taylor KC et al. Onset of deglacial warming in West Antarctica driven by local orbital forcing. Nature. 2013 Aug 15;500(7463):440-444. https://doi.org/10.1038/nature12376