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dc.contributor.authorBuizert, Christo
dc.contributor.authorAdrian, Betty
dc.contributor.authorAhn, Jinho
dc.contributor.authorAlbert, Mary
dc.contributor.authorAlley, Richard B.
dc.contributor.authorBaggenstos, Daniel
dc.contributor.authorBauska, Thomas K.
dc.contributor.authorBay, Ryan C.
dc.contributor.authorBencivengo, Brian B.
dc.contributor.authorBentley, Charles R.
dc.contributor.authorBrook, Edward J.
dc.contributor.authorChellman, Nathan J.
dc.contributor.authorClow, Gary D.
dc.contributor.authorCole-Dai, Jihong
dc.contributor.authorConway, Howard
dc.contributor.authorCravens, Eric
dc.contributor.authorCuffey, Kurt M.
dc.contributor.authorDunbar, Nelia W.
dc.contributor.authorEdwards, Jon S.
dc.contributor.authorFegyveresi, John M.
dc.contributor.authorFerris, Dave G.
dc.contributor.authorFitzpatrick, Joan J.
dc.contributor.authorFudge, T. J.
dc.contributor.authorGibson, Chris J.
dc.contributor.authorGkinis, Vasileios
dc.contributor.authorGoetz, Joshua J.
dc.contributor.authorGregory, Stephanie
dc.contributor.authorHargreaves, Geoffrey M.
dc.contributor.authorIverson, Nels
dc.contributor.authorJohnson, Jay A.
dc.contributor.authorJones, Tyler R.
dc.contributor.authorKalk, Michael L.
dc.contributor.authorKippenhan, Matthew J.
dc.contributor.authorKoffman, Bess G.
dc.contributor.authorKreutz, Karl
dc.contributor.authorKuhl, Tanner W.
dc.contributor.authorLebar, Donald A.
dc.contributor.authorLee, James E.
dc.contributor.authorMarcott, Shaun A.
dc.contributor.authorMarkle, Bradley R.
dc.contributor.authorMaselli, Olivia J.
dc.contributor.authorMcConnell, Joseph R.
dc.contributor.authorMcGwire, Kenneth C.
dc.contributor.authorMitchell, Logan E.
dc.contributor.authorMortensen, Nicolai B.
dc.contributor.authorNeff, Peter D.
dc.contributor.authorNishiizumi, Kunihiko
dc.contributor.authorNunn, Richard M.
dc.contributor.authorOrsi, Anais J.
dc.contributor.authorPasteris, Daniel R.
dc.contributor.authorPedro, Joel B.
dc.contributor.authorPettit, Erin C.
dc.contributor.authorPrice, P. Buford
dc.contributor.authorPriscu, John C.
dc.contributor.authorRhodes, Rachael H.
dc.contributor.authorRosen, Julia L.
dc.contributor.authorSchauer, Andrew J.
dc.contributor.authorSchoenemann, Spruce W.
dc.contributor.authorSendelbach, Paul J.
dc.contributor.authorSeveringhaus, Jeffrey P.
dc.contributor.authorShturmakov, Alexander J.
dc.contributor.authorSigl, Michael
dc.contributor.authorSlawny, Kristina R.
dc.contributor.authorSouney, Joseph M.
dc.contributor.authorSowers, Todd A.
dc.contributor.authorSpencer, Matthew K.
dc.contributor.authorSteig, Eric J.
dc.contributor.authorTaylor, Kendrick C.
dc.contributor.authorTwickler, Mark S.
dc.contributor.authorVaughn, Bruce H.
dc.contributor.authorVoigt, Donald E.
dc.contributor.authorWaddington, Edwin D.
dc.contributor.authorWelten, Kees C.
dc.contributor.authorWendricks, Anthony W.
dc.contributor.authorWhite, James W. C.
dc.contributor.authorWinstrup, Mai
dc.contributor.authorWong, Gifford J.
dc.contributor.authorWoodruff, Thomas E.
dc.identifier.citationWAIS Divide Project Members, and John C. Priscu. "Precise interpolar phasing of abrupt climate change during the last ice age." Nature 520, no. 7549 (April 2015): 661-665. DOI: .en_US
dc.description.abstractThe last glacial period exhibited abrupt Dansgaard–Oeschger climatic oscillations, evidence of which is preserved in a variety of Northern Hemisphere palaeoclimate archives1. Ice cores show that Antarctica cooled during the warm phases of the Greenland Dansgaard–Oeschger cycle and vice versa2, 3, suggesting an interhemispheric redistribution of heat through a mechanism called the bipolar seesaw4, 5, 6. 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 events7, 8, 9. 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 precision2, 3, 10. 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.en_US
dc.description.sponsorshipNational Science Foundation Office of Polar Programs also funded the WAIS Divide Science Coordination Office at the Desert Research Institute of Nevadaen_US
dc.titlePrecise interpolar phasing of abrupt climate change during the last ice ageen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.universityMontana State University - Bozemanen_US

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