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

  title={Timing of millennial-scale climate change in Antarctica and Greenland during the last glacial period.},
  author={Thomas Blunier and Edward J. Brook},
  volume={291 5501},
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… 

Relative Timing of Deglacial Climate Events in Antarctica and Greenland

A chronology from the high-accumulation Law Dome East Antarctic ice core provides strong evidence that the cooling at the start of the Antarctic Cold Reversal did not follow the abrupt warming during the northern Bølling transition around 14,500 years ago, and suggests that southern changes are not a direct response to abrupt changes in North Atlantic thermohaline circulation, as is assumed in the conventional picture of a hemispheric temperature seesaw.

Timing of millennial-scale climate change at Siple Dome, West Antarctica, during the last glacial period

Atmospheric CO2 and Climate on Millennial Time Scales During the Last Glacial Period

Evidence from marine sediment proxies indicates that CO2 concentration rose most rapidly when North Atlantic Deep Water shoaled and stratification in the Southern Ocean was reduced, implying a strong connection to Southern Ocean processes.

Expression of the bipolar see-saw in Antarctic climate records during the last deglaciation

Ice-core records of climate from Greenland and Antarctica show asynchronous temperature variations on millennial timescales during the last glacial period 1 . The warming during the transition from

Orbital and Millennial Antarctic Climate Variability over the Past 800,000 Years

It is suggested that the interplay between obliquity and precession accounts for the variable intensity of interglacial periods in ice core records.

Antarctic lakes suggest millennial reorganizations of Southern Hemisphere atmospheric and oceanic circulation

New data from closed-basin lakes in the Dry Valleys region of East Antarctica that show high-magnitude, high-frequency oscillations in surface level during the late Pleistocene synchronous with climate fluctuations elsewhere in the Southern Hemisphere suggest a coherent Southern Hemisphere pattern of climate change on millennial time scales.

Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation

[1] A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed

Low‐latitude hydrological cycle and rapid climate changes during the last deglaciation

Sea surface temperature and oxygen isotopic records from two well‐dated Indian Ocean cores covering the last deglaciation show the occurrence of two periods of increased salinity along the route of

Synchroneity of Tropical and High-Latitude Atlantic Temperatures over the Last Glacial Termination

A rapid southward shift in the atmospheric intertropical convergence zone could account for the synchroneity of tropical temperature, atmospheric methane, and high-latitude changes during the Younger Dryas.



Oxygen Isotope Profiles through the Antarctic and Greenland Ice Sheets

The Camp Century, Greenland, deep ice core reveals seasonal variations in the isotopic composition of the ice back to 8,300 years BP. This is not the case for the Byrd Station, Antarctica, deep ice

Abrupt climate change at the end of the last glacial period inferred from trapped air in polar Ice

Nitrogen and argon isotopes in trapped air in Greenland ice show that the Greenland Summit warmed 9 +/- 3 degrees C over a period of several decades, beginning 14,672 years ago, supporting a North Atlantic rather than a tropical trigger for the climate event.

Iceberg Discharges into the North Atlantic on Millennial Time Scales During the Last Glaciation

High-resolution studies of North Atlantic deep sea cores demonstrate that prominent increases in iceberg calving recurred at intervals of 2000 to 3000 years, much more frequently than the 7000-to

Atmospheric CO2 concentration from 60 to 20 kyr BP from the Taylor Dome Ice Core, Antarctica

A high‐resolution record of the atmospheric CO2 concentration from 60 to 20 thousand years before present (kyr BP) based on measurements on the ice core of Taylor Dome, Antarctica is presented. This

Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores

RECENT results1,2 from the Greenland Ice-core Project (GRIP) Summit ice core suggest that the climate in Greenland has been remarkably stable during the Holocene, but was extremely unstable for the

16°C Rapid Temperature Variation in Central Greenland 70,000 Years Ago

Variations in the29N2/28N2 ratio of air bubbles trapped in polar ice cores and their relation to variations of the 18O/16O of the ice allow past surface temperature variations and ice age–gas age


  • T. Schopf
  • Environmental Science, Geography
  • 1976
glacial-marine sedimentation: stratigraphy, paleoenvironments, and glacial history on high latitude shelves (East Greenland, West Greenland, Arctic Island Channels); and 3) Modern foraminiferal

GCM analysis of local influences on ice core δ signals

A high resolution GCM is used to examine the effect of changes in local surface climate parameters on the ice sheets that can influence the interpretation of the isotopic signal of the ice from deep

Enhanced Atlantic freshwater export during El Niño

Using two reanalysis data sets, the influence of El Niño/Southern Oscillation (ENSO) on the surface freshwater balance of the Atlantic ocean is examined. We present evidence that the transport of