Rapid coupling between ice volume and polar temperature over the past 150,000 years
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Material Information

Title:
Rapid coupling between ice volume and polar temperature over the past 150,000 years
Series Title:
Nature Volume 491
Creator:
Grant, K.M.
Rohling, E.J.
Bar-Matthews, M.
Ayalon, A.
Medina-Elizalde, M.
Bronk Ramsey, C.
Satow, C.
Roberts, A.P.
Publisher:
Macmillan Publishers Limited
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Climate Change ( lcsh )
Sea Level Rise ( lcsh )
Global Warming ( lcsh )
Greenland ( lcsh )

Notes

Abstract:
Current global warming necessitates a detailed understanding of the relationships between climate and global ice volume. Highly resolved and continuous sea-level records are essential for quantifying ice-volumechanges.However, an unbiased study of the timing of past ice-volume changes, relative to polar climate change, has so far been impossible because available sea-level records either were dated by using orbital tuning or ice-core timescales, or were discontinuous in time. Here we present an independent dating of a continuous, high-resolution sea-level record1,2 in millennial-scale detail throughout the past 150,000 years. We find that the timing of ice-volume fluctuations agrees well with that of variations in Antarctic climate and especially Greenland climate.Amplitudes of ice-volumefluctuations more closely match Antarctic (rather than Greenland) climate changes. Polar climate and ice-volume changes, and their rates of change, are found to covary within centennial response times. Finally, rates of sea-level rise reached at least 1.2mper century during all major episodes of ice-volume reduction. ( English )

Record Information

Source Institution:
Florida International University
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Sea Level Rise