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• 1. [Article] Abrupt change in atmospheric CO₂ during the last ice age

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gl/.

  Citation × Citation Citation Abstract Copy Title: Abrupt change in atmospheric CO₂ during the last ice age Author: Brook, Edward J., Kreutz, Karl, Ahn, Jinho, Schmittner, Andreas This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gl/. Title: Abrupt change in atmospheric CO₂ during the last ice age Author: Brook, Edward J., Kreutz, Karl, Ahn, Jinho, Schmittner, Andreas This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gl/. Close

• 2. [Article] Impact of the Ocean’s Overturning Circulation on Atmospheric CO2

  A coupled climate-carbon cycle model and ice core CO2 data from the last glacial period are used to explore the impact of changes in ocean circulation on atmospheric CO2 concentrations on millennial time ...

  Citation × Citation Citation Abstract Copy Title: Impact of the Ocean’s Overturning Circulation on Atmospheric CO2 Author: Brook, Edward J., Schmittner, Andreas, Ahn, Jinho A coupled climate-carbon cycle model and ice core CO2 data from the last glacial period are used to explore the impact of changes in ocean circulation on atmospheric CO2 concentrations on millennial time scales. In the model, stronger wind driven circulation increases atmospheric CO2. Changes in the buoyancy driven deep overturning in the Atlantic affect atmospheric CO2 only indirectly through their effect on Southern Ocean stratification. In simulations with an abrupt and complete shutdown of the Atlantic overturning, stratification in the Southern Ocean decreases due to salinification of surface waters and freshening of the deep sea. Deeper mixed layers and steeper isopycnals lead to outgassing of CO2 in the Southern Ocean and hence gradually increasing atmospheric CO2 concentrations on a multi-millennial time scale. The rise in CO2 terminates at the time of rapid resumption of deep water formation and warming in the North Atlantic, and CO2 levels subsequently gradually decrease. These model responses and a strong correlation between simulated atmospheric CO2 and Antarctic surface air temperatures with little or no time lag are consistent with newly synchronized ice core data from the last ice age. Sensitivity experiments reveal that the amplitude of the response of atmospheric CO2 is sensitive to the model background climatic state and decreases in a colder climate owing to smaller changes in the overturning. Title: Impact of the Ocean’s Overturning Circulation on Atmospheric CO2 Author: Brook, Edward J., Schmittner, Andreas, Ahn, Jinho A coupled climate-carbon cycle model and ice core CO2 data from the last glacial period are used to explore the impact of changes in ocean circulation on atmospheric CO2 concentrations on millennial time scales. In the model, stronger wind driven circulation increases atmospheric CO2. Changes in the buoyancy driven deep overturning in the Atlantic affect atmospheric CO2 only indirectly through their effect on Southern Ocean stratification. In simulations with an abrupt and complete shutdown of the Atlantic overturning, stratification in the Southern Ocean decreases due to salinification of surface waters and freshening of the deep sea. Deeper mixed layers and steeper isopycnals lead to outgassing of CO2 in the Southern Ocean and hence gradually increasing atmospheric CO2 concentrations on a multi-millennial time scale. The rise in CO2 terminates at the time of rapid resumption of deep water formation and warming in the North Atlantic, and CO2 levels subsequently gradually decrease. These model responses and a strong correlation between simulated atmospheric CO2 and Antarctic surface air temperatures with little or no time lag are consistent with newly synchronized ice core data from the last ice age. Sensitivity experiments reveal that the amplitude of the response of atmospheric CO2 is sensitive to the model background climatic state and decreases in a colder climate owing to smaller changes in the overturning. Close

• 3. [Article] Atmospheric CO₂ and climate from 65 to 30 ka B.P.

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gl/.

  Citation × Citation Citation Abstract Copy Title: Atmospheric CO₂ and climate from 65 to 30 ka B.P. Author: Ahn, Jinho, Brook, Edward J. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gl/. Title: Atmospheric CO₂ and climate from 65 to 30 ka B.P. Author: Ahn, Jinho, Brook, Edward J. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gl/. Close

• 4. [Article] On the origin and timing of rapid changes in atmospheric methane during the Last Glacial Period

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gb/index.shtml.

  Citation × Citation Citation Abstract Copy Title: On the origin and timing of rapid changes in atmospheric methane during the Last Glacial Period Author: Steig, Eric J., Harder, Susan, Brook, Edward J., Severinghaus, Jeff, Sucher, Cara M. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gb/index.shtml. Title: On the origin and timing of rapid changes in atmospheric methane during the Last Glacial Period Author: Steig, Eric J., Harder, Susan, Brook, Edward J., Severinghaus, Jeff, Sucher, Cara M. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gb/index.shtml. Close

• 5. [Article] Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/.

  Citation × Citation Citation Abstract Copy Title: Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland Author: Brook, Edward J., Bender, Michael L., Landais, Amaelle, von Fischer, Joseph C., Suwa, Makoto This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. Title: Chronology reconstruction for the disturbed bottom section of the GISP2 and the GRIP ice cores: Implications for Termination II in Greenland Author: Brook, Edward J., Bender, Michael L., Landais, Amaelle, von Fischer, Joseph C., Suwa, Makoto This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/jgr/. Close

• 6. [Article] Onset of deglacial warming in West Antarctica driven by local orbital forcing

  To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Macmillan ...

  Citation × Citation Citation Abstract Copy Title: Onset of deglacial warming in West Antarctica driven by local orbital forcing Author: Mortensen, Nicolai, Edwards, R. Lawrence, Popp, Trevor J., Brook, Edward J., Neff, Peter, Edwards, Ross, Sowers, Todd, Cole-Dai, Jihong, Markle, Bradley R., Johnson, Jay, Hargreaves, Geoffrey, Schauer, Andrew J., Cuffey, Kurt M., Fegyveresi, John M., White, James W. C., Alley, Richard B., Clow, Gary D., McGwire, Kenneth C., Ding, Qinghua, Mitchell, Logan E., Fitzpatrick, Joan J., Schoenemann, Spruce W., Steig, Eric J., Fudge, T. J., Maselli, Olivia J., Mason, William, Ferris, David, Orsi, Anais J., Edwards, Jon S., Taylor, Kendrick C., McConnell, Joseph R., Conway, Howard, Lee, James E., Cheng, Hai To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Macmillan Publishers Limited and can be found at: http://www.macmillan.com/. Title: Onset of deglacial warming in West Antarctica driven by local orbital forcing Author: Mortensen, Nicolai, Edwards, R. Lawrence, Popp, Trevor J., Brook, Edward J., Neff, Peter, Edwards, Ross, Sowers, Todd, Cole-Dai, Jihong, Markle, Bradley R., Johnson, Jay, Hargreaves, Geoffrey, Schauer, Andrew J., Cuffey, Kurt M., Fegyveresi, John M., White, James W. C., Alley, Richard B., Clow, Gary D., McGwire, Kenneth C., Ding, Qinghua, Mitchell, Logan E., Fitzpatrick, Joan J., Schoenemann, Spruce W., Steig, Eric J., Fudge, T. J., Maselli, Olivia J., Mason, William, Ferris, David, Orsi, Anais J., Edwards, Jon S., Taylor, Kendrick C., McConnell, Joseph R., Conway, Howard, Lee, James E., Cheng, Hai To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by Macmillan Publishers Limited and can be found at: http://www.macmillan.com/. Close

• 7. [Article] Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka

  This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gb/index.shtml.

  Citation × Citation Citation Abstract Copy Title: Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka Author: Brook, Edward J., Severinghaus, Jeffrey P., Grachev, Alexi M., Pisias, Nicklas G. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gb/index.shtml. Title: Relative timing and variability of atmospheric methane and GISP2 oxygen isotopes between 68 and 86 ka Author: Brook, Edward J., Severinghaus, Jeffrey P., Grachev, Alexi M., Pisias, Nicklas G. This is the publisher’s final pdf. The published article is copyrighted by the American Geophysical Union and can be found at: http://www.agu.org/journals/gb/index.shtml. Close

• 8. [Article] Precise interpolar phasing of abrupt climate change during the last ice age

  To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Nature ...

  Citation × Citation Citation Abstract Copy Title: Precise interpolar phasing of abrupt climate change during the last ice age Author: Rhodes, Rachael H., Rosen, Julia L., Kalk, Michael L., Buizert, Christo, Edwards, Jon S., Adrian, Betty, Bauska, Thomas K., Marcott, Shaun A., et al., Mitchell, Logan E., Lee, James E., Brook, Edward J., Ahn, Jinho To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Nature Publishing Group and can be found at: http://www.nature.com/nature/index.html. Supporting Information can be found at: http://www.nature.com/nature/journal/v520/n7549/full/nature14401.html#/supplementary-information Title: Precise interpolar phasing of abrupt climate change during the last ice age Author: Rhodes, Rachael H., Rosen, Julia L., Kalk, Michael L., Buizert, Christo, Edwards, Jon S., Adrian, Betty, Bauska, Thomas K., Marcott, Shaun A., et al., Mitchell, Logan E., Lee, James E., Brook, Edward J., Ahn, Jinho To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Nature Publishing Group and can be found at: http://www.nature.com/nature/index.html. Supporting Information can be found at: http://www.nature.com/nature/journal/v520/n7549/full/nature14401.html#/supplementary-information Close

• 9. [Article] The WAIS Divide deep ice core WD2014 chronology - Part 2: Annual-layer counting (0-31 ka BP)

  This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can ...

  Citation × Citation Citation Abstract Copy Title: The WAIS Divide deep ice core WD2014 chronology - Part 2: Annual-layer counting (0-31 ka BP) Author: Layman, Lawrence, Brook, Edward J., Caffee, Marc W., Edwards, Ross, Ferris, David, Buizert, Christo, Cole-Dai, Jihong, Fudge, Tyler J., Woodruff, Thomas E., Taylor, Ken C., McConnell, Joseph R., Nishiizumi, Kunihiko, McGwire, Kenneth, Sigl, Michael, Muscheler, Raimund, Koffman, Bess, Iverson, Nels, Welten, Kees C., Sowers, Todd A, Rhodes, Rachael H., Maselli, Olivia J., Geng, Lei, Pasteris, Daniel R., Dunbar, Nelia W., Bisiaux, Marion, Winstrup, Mai, Adolphi, Florian This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can be found at: http://www.climate-of-the-past.net/ Title: The WAIS Divide deep ice core WD2014 chronology - Part 2: Annual-layer counting (0-31 ka BP) Author: Layman, Lawrence, Brook, Edward J., Caffee, Marc W., Edwards, Ross, Ferris, David, Buizert, Christo, Cole-Dai, Jihong, Fudge, Tyler J., Woodruff, Thomas E., Taylor, Ken C., McConnell, Joseph R., Nishiizumi, Kunihiko, McGwire, Kenneth, Sigl, Michael, Muscheler, Raimund, Koffman, Bess, Iverson, Nels, Welten, Kees C., Sowers, Todd A, Rhodes, Rachael H., Maselli, Olivia J., Geng, Lei, Pasteris, Daniel R., Dunbar, Nelia W., Bisiaux, Marion, Winstrup, Mai, Adolphi, Florian This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can be found at: http://www.climate-of-the-past.net/ Close

• 10. [Article] High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core

  This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can ...

  Citation × Citation Citation Abstract Copy Title: High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core Author: Schuepbach, S., Brook, Edward J., Blunier, T., Rosen, J., Romanini, D., Baslev-Clausen, D., Mitchell, L. E., Fain, X., Stowasser, C., Pascual, O., Chappellaz, J., Lee, J. E., Dallmayr, R. This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can be found at: http://www.clim-past.net/volumes_and_issues.html. Title: High-resolution glacial and deglacial record of atmospheric methane by continuous-flow and laser spectrometer analysis along the NEEM ice core Author: Schuepbach, S., Brook, Edward J., Blunier, T., Rosen, J., Romanini, D., Baslev-Clausen, D., Mitchell, L. E., Fain, X., Stowasser, C., Pascual, O., Chappellaz, J., Lee, J. E., Dallmayr, R. This is the publisher’s final pdf. The published article is copyrighted by the author(s) and published by Copernicus Publications on behalf of the European Geosciences Union. The published article can be found at: http://www.clim-past.net/volumes_and_issues.html. Close