Precise interpolar phasing of abrupt climate change during the last ice age
The last glacial period exhibited abrupt Dansgaard-Oeschger climatic oscillations, evidence of which is preserved in a variety of Northern Hemisphere palaeoclimate archives. Ice cores show that Antarctica cooled during the warm phases of the Greenland Dansgaard-Oeschger cycle and vice versa, suggest...
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2015
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ftcdlib:oai:escholarship.org:ark:/13030/qt8w75f0wz 2023-10-25T01:29:38+02:00 Precise interpolar phasing of abrupt climate change during the last ice age Buizert, Christo Adrian, Betty Ahn, Jinho Albert, Mary Alley, Richard B Baggenstos, Daniel Bauska, Thomas K Bay, Ryan C Bencivengo, Brian B Bentley, Charles R Brook, Edward J Chellman, Nathan J Clow, Gary D Cole-Dai, Jihong Conway, Howard Cravens, Eric Cuffey, Kurt M Dunbar, Nelia W Edwards, Jon S Fegyveresi, John M Ferris, Dave G Fitzpatrick, Joan J Fudge, TJ Gibson, Chris J Gkinis, Vasileios Goetz, Joshua J Gregory, Stephanie Hargreaves, Geoffrey M Iverson, Nels Johnson, Jay A Jones, Tyler R Kalk, Michael L Kippenhan, Matthew J Koffman, Bess G Kreutz, Karl Kuhl, Tanner W Lebar, Donald A Lee, James E Marcott, Shaun A Markle, Bradley R Maselli, Olivia J McConnell, Joseph R McGwire, Kenneth C Mitchell, Logan E Mortensen, Nicolai B Neff, Peter D Nishiizumi, Kunihiko Nunn, Richard M Orsi, Anais J Pasteris, Daniel R Pedro, Joel B Pettit, Erin C Price, P Buford Priscu, John C Rhodes, Rachael H Rosen, Julia L Schauer, Andrew J Schoenemann, Spruce W Sendelbach, Paul J Severinghaus, Jeffrey P Shturmakov, Alexander J Sigl, Michael Slawny, Kristina R Souney, Joseph M Sowers, Todd A Spencer, Matthew K Steig, Eric J Taylor, Kendrick C Twickler, Mark S Vaughn, Bruce H Voigt, Donald E Waddington, Edwin D Welten, Kees C Wendricks, Anthony W White, James WC Winstrup, Mai Wong, Gifford J Woodruff, Thomas E 661 - 665 2015-04-01 application/pdf https://escholarship.org/uc/item/8w75f0wz unknown eScholarship, University of California qt8w75f0wz https://escholarship.org/uc/item/8w75f0wz public Nature, vol 520, iss 7549 Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action WAIS Divide Project Members General Science & Technology article 2015 ftcdlib 2023-09-25T18:02:59Z The last glacial period exhibited abrupt Dansgaard-Oeschger climatic oscillations, evidence of which is preserved in a variety of Northern Hemisphere palaeoclimate archives. Ice cores show that Antarctica cooled during the warm phases of the Greenland Dansgaard-Oeschger cycle and vice versa, suggesting an interhemispheric redistribution of heat through a mechanism called the bipolar seesaw. Variations in the Atlantic meridional overturning circulation (AMOC) strength are thought to have been important, but much uncertainty remains regarding the dynamics and trigger of these abrupt events. Key information is contained in the relative phasing of hemispheric climate variations, yet the large, poorly constrained difference between gas age and ice age and the relatively low resolution of methane records from Antarctic ice cores have so far precluded methane-based synchronization at the required sub-centennial precision. Here we use a recently drilled high-accumulation Antarctic ice core to show that, on average, abrupt Greenland warming leads the corresponding Antarctic cooling onset by 218 ± 92 years (2σ) for Dansgaard-Oeschger events, including the Bølling event; Greenland cooling leads the corresponding onset of Antarctic warming by 208 ± 96 years. Our results demonstrate a north-to-south directionality of the abrupt climatic signal, which is propagated to the Southern Hemisphere high latitudes by oceanic rather than atmospheric processes. The similar interpolar phasing of warming and cooling transitions suggests that the transfer time of the climatic signal is independent of the AMOC background state. Our findings confirm a central role for ocean circulation in the bipolar seesaw and provide clear criteria for assessing hypotheses and model simulations of Dansgaard-Oeschger dynamics. Article in Journal/Newspaper Antarc* Antarctic Antarctica Dansgaard-Oeschger events Greenland ice core University of California: eScholarship Antarctic Greenland |
institution |
Open Polar |
collection |
University of California: eScholarship |
op_collection_id |
ftcdlib |
language |
unknown |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action WAIS Divide Project Members General Science & Technology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action WAIS Divide Project Members General Science & Technology Buizert, Christo Adrian, Betty Ahn, Jinho Albert, Mary Alley, Richard B Baggenstos, Daniel Bauska, Thomas K Bay, Ryan C Bencivengo, Brian B Bentley, Charles R Brook, Edward J Chellman, Nathan J Clow, Gary D Cole-Dai, Jihong Conway, Howard Cravens, Eric Cuffey, Kurt M Dunbar, Nelia W Edwards, Jon S Fegyveresi, John M Ferris, Dave G Fitzpatrick, Joan J Fudge, TJ Gibson, Chris J Gkinis, Vasileios Goetz, Joshua J Gregory, Stephanie Hargreaves, Geoffrey M Iverson, Nels Johnson, Jay A Jones, Tyler R Kalk, Michael L Kippenhan, Matthew J Koffman, Bess G Kreutz, Karl Kuhl, Tanner W Lebar, Donald A Lee, James E Marcott, Shaun A Markle, Bradley R Maselli, Olivia J McConnell, Joseph R McGwire, Kenneth C Mitchell, Logan E Mortensen, Nicolai B Neff, Peter D Nishiizumi, Kunihiko Nunn, Richard M Orsi, Anais J Pasteris, Daniel R Pedro, Joel B Pettit, Erin C Price, P Buford Priscu, John C Rhodes, Rachael H Rosen, Julia L Schauer, Andrew J Schoenemann, Spruce W Sendelbach, Paul J Severinghaus, Jeffrey P Shturmakov, Alexander J Sigl, Michael Slawny, Kristina R Souney, Joseph M Sowers, Todd A Spencer, Matthew K Steig, Eric J Taylor, Kendrick C Twickler, Mark S Vaughn, Bruce H Voigt, Donald E Waddington, Edwin D Welten, Kees C Wendricks, Anthony W White, James WC Winstrup, Mai Wong, Gifford J Woodruff, Thomas E Precise interpolar phasing of abrupt climate change during the last ice age |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Geology Climate Action WAIS Divide Project Members General Science & Technology |
description |
The last glacial period exhibited abrupt Dansgaard-Oeschger climatic oscillations, evidence of which is preserved in a variety of Northern Hemisphere palaeoclimate archives. Ice cores show that Antarctica cooled during the warm phases of the Greenland Dansgaard-Oeschger cycle and vice versa, suggesting an interhemispheric redistribution of heat through a mechanism called the bipolar seesaw. Variations in the Atlantic meridional overturning circulation (AMOC) strength are thought to have been important, but much uncertainty remains regarding the dynamics and trigger of these abrupt events. Key information is contained in the relative phasing of hemispheric climate variations, yet the large, poorly constrained difference between gas age and ice age and the relatively low resolution of methane records from Antarctic ice cores have so far precluded methane-based synchronization at the required sub-centennial precision. Here we use a recently drilled high-accumulation Antarctic ice core to show that, on average, abrupt Greenland warming leads the corresponding Antarctic cooling onset by 218 ± 92 years (2σ) for Dansgaard-Oeschger events, including the Bølling event; Greenland cooling leads the corresponding onset of Antarctic warming by 208 ± 96 years. Our results demonstrate a north-to-south directionality of the abrupt climatic signal, which is propagated to the Southern Hemisphere high latitudes by oceanic rather than atmospheric processes. The similar interpolar phasing of warming and cooling transitions suggests that the transfer time of the climatic signal is independent of the AMOC background state. Our findings confirm a central role for ocean circulation in the bipolar seesaw and provide clear criteria for assessing hypotheses and model simulations of Dansgaard-Oeschger dynamics. |
format |
Article in Journal/Newspaper |
author |
Buizert, Christo Adrian, Betty Ahn, Jinho Albert, Mary Alley, Richard B Baggenstos, Daniel Bauska, Thomas K Bay, Ryan C Bencivengo, Brian B Bentley, Charles R Brook, Edward J Chellman, Nathan J Clow, Gary D Cole-Dai, Jihong Conway, Howard Cravens, Eric Cuffey, Kurt M Dunbar, Nelia W Edwards, Jon S Fegyveresi, John M Ferris, Dave G Fitzpatrick, Joan J Fudge, TJ Gibson, Chris J Gkinis, Vasileios Goetz, Joshua J Gregory, Stephanie Hargreaves, Geoffrey M Iverson, Nels Johnson, Jay A Jones, Tyler R Kalk, Michael L Kippenhan, Matthew J Koffman, Bess G Kreutz, Karl Kuhl, Tanner W Lebar, Donald A Lee, James E Marcott, Shaun A Markle, Bradley R Maselli, Olivia J McConnell, Joseph R McGwire, Kenneth C Mitchell, Logan E Mortensen, Nicolai B Neff, Peter D Nishiizumi, Kunihiko Nunn, Richard M Orsi, Anais J Pasteris, Daniel R Pedro, Joel B Pettit, Erin C Price, P Buford Priscu, John C Rhodes, Rachael H Rosen, Julia L Schauer, Andrew J Schoenemann, Spruce W Sendelbach, Paul J Severinghaus, Jeffrey P Shturmakov, Alexander J Sigl, Michael Slawny, Kristina R Souney, Joseph M Sowers, Todd A Spencer, Matthew K Steig, Eric J Taylor, Kendrick C Twickler, Mark S Vaughn, Bruce H Voigt, Donald E Waddington, Edwin D Welten, Kees C Wendricks, Anthony W White, James WC Winstrup, Mai Wong, Gifford J Woodruff, Thomas E |
author_facet |
Buizert, Christo Adrian, Betty Ahn, Jinho Albert, Mary Alley, Richard B Baggenstos, Daniel Bauska, Thomas K Bay, Ryan C Bencivengo, Brian B Bentley, Charles R Brook, Edward J Chellman, Nathan J Clow, Gary D Cole-Dai, Jihong Conway, Howard Cravens, Eric Cuffey, Kurt M Dunbar, Nelia W Edwards, Jon S Fegyveresi, John M Ferris, Dave G Fitzpatrick, Joan J Fudge, TJ Gibson, Chris J Gkinis, Vasileios Goetz, Joshua J Gregory, Stephanie Hargreaves, Geoffrey M Iverson, Nels Johnson, Jay A Jones, Tyler R Kalk, Michael L Kippenhan, Matthew J Koffman, Bess G Kreutz, Karl Kuhl, Tanner W Lebar, Donald A Lee, James E Marcott, Shaun A Markle, Bradley R Maselli, Olivia J McConnell, Joseph R McGwire, Kenneth C Mitchell, Logan E Mortensen, Nicolai B Neff, Peter D Nishiizumi, Kunihiko Nunn, Richard M Orsi, Anais J Pasteris, Daniel R Pedro, Joel B Pettit, Erin C Price, P Buford Priscu, John C Rhodes, Rachael H Rosen, Julia L Schauer, Andrew J Schoenemann, Spruce W Sendelbach, Paul J Severinghaus, Jeffrey P Shturmakov, Alexander J Sigl, Michael Slawny, Kristina R Souney, Joseph M Sowers, Todd A Spencer, Matthew K Steig, Eric J Taylor, Kendrick C Twickler, Mark S Vaughn, Bruce H Voigt, Donald E Waddington, Edwin D Welten, Kees C Wendricks, Anthony W White, James WC Winstrup, Mai Wong, Gifford J Woodruff, Thomas E |
author_sort |
Buizert, Christo |
title |
Precise interpolar phasing of abrupt climate change during the last ice age |
title_short |
Precise interpolar phasing of abrupt climate change during the last ice age |
title_full |
Precise interpolar phasing of abrupt climate change during the last ice age |
title_fullStr |
Precise interpolar phasing of abrupt climate change during the last ice age |
title_full_unstemmed |
Precise interpolar phasing of abrupt climate change during the last ice age |
title_sort |
precise interpolar phasing of abrupt climate change during the last ice age |
publisher |
eScholarship, University of California |
publishDate |
2015 |
url |
https://escholarship.org/uc/item/8w75f0wz |
op_coverage |
661 - 665 |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events Greenland ice core |
genre_facet |
Antarc* Antarctic Antarctica Dansgaard-Oeschger events Greenland ice core |
op_source |
Nature, vol 520, iss 7549 |
op_relation |
qt8w75f0wz https://escholarship.org/uc/item/8w75f0wz |
op_rights |
public |
_version_ |
1780733699379167232 |