Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974natur.252..216c&link_type=abstract
Nature, Volume 252, Issue 5480, pp. 216-218 (1974).
Astronomy and Astrophysics
Astronomy
8
Scientific paper
THE Milankovitch hypothesis is that glaciations occur when the Northern Hemisphere receives relatively little summer heat from the Sun, because of astronomical factors that alter the orientation of the Earth's axis and the eccentricity of its orbit. A new time scale for the ocean-bed record of the past eight glaciations is provided1,2 by the magnetic reversal at the start of the Brunhes epoch, 700,000 yr ago. In addition, Vernekar's recalculated insolation tables3 are now available. For a popular account of climatic change4, I wanted to illustrate the opportunity thus provided, for a re-evaluation of the Milankovitch hypothesis.
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