Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period.

A precise relative chronology for Greenland and West Antarctic paleotemperature is extended to 90,000 years ago, based on correlation of atmospheric methane records from the Greenland Ice Sheet Project 2 and Byrd ice cores. Over this period, the onset of seven major millennial-scale warmings in Antarctica preceded the onset of Greenland warmings by 1500 to 3000 years. In general, Antarctic temperatures increased gradually while Greenland temperatures were decreasing or constant, and the termination of Antarctic warming was apparently coincident with the onset of rapid warming in Greenland. This pattern provides further evidence for the operation of a "bipolar see-saw" in air temperatures and an oceanic teleconnection between the hemispheres on millennial time scales.

[1]  T. Schopf.  Paleoceanography. , 2021, Science.

[2]  C. Wunsch.  On sharp spectral lines in the climate record and the millennial peak , 2000 .

[3]  T. Stocker,et al.  Enhanced Atlantic freshwater export during El Niño , 2000 .

[4]  T. Stocker,et al.  Atmospheric CO2 concentration from 60 to 20 kyr BP from the Taylor Dome Ice Core, Antarctica , 2000 .

[5]  T. Stocker,et al.  Abrupt climate change in the computer: is it real? , 2000, Proceedings of the National Academy of Sciences of the United States of America.

[6]  Brook,et al.  Abrupt climate change at the end of the last glacial period inferred from trapped air in polar Ice , 1999, Science.

[7]  M. Leuenberger,et al.  16°C Rapid Temperature Variation in Central Greenland 70,000 Years Ago , 1999 .

[8]  R. Alley,et al.  THE DEGLACIATION OF THE NORTHERN HEMISPHERE: A Global Perspective , 1999 .

[9]  Wallace S. Broecker,et al.  PALEOCEAN CIRCULATION DURING THE LAST DEGLACIATION : A BIPOLAR SEESAW ? , 1998 .

[10]  J. Jouzel,et al.  GCM analysis of local influences on ice core δ signals , 1997 .

[11]  G. Bond,et al.  Iceberg Discharges into the North Atlantic on Millennial Time Scales During the Last Glaciation , 1995, Science.

[12]  J. Jouzel,et al.  Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores , 1993, Nature.

[13]  P. Grootes.  The climatic record in polar ice sheets: edited by G. de Q. Robin. Cambridge University Press, 1983, 212p., US $65.00 (ISBN 0-521-25087-0) , 1990 .

[14]  R. Hooke.  The climatic record in polar ice sheets , 1985 .

[15]  T. Stocker.  Past and future reorganizations in the climate system , 2000 .

[16]  André Berger,et al.  Insolation values for the climate of the last 10 , 1991 .

[17]  N. Shackleton.  Oxygen isotopes, ice volume and sea level , 1987 .

[18]  W. Dansgaard,et al.  Oxygen Isotope Profiles through the Antarctic and Greenland Ice Sheets , 1972, Nature.