James Hays

James D. Hays is a professor of Earth and environmental sciences at Columbia University's Lamont-Doherty Earth Observatory. [ [http://www.sipa.columbia.edu/academics/directory/jdh1-fac.html Faculty bio page, Columbia University, accessed April 19, 2008] ] Hays founded and led the CLIMAP project, which collected sea floor sediment data to study surface sea temperatures and paleoclimatological conditions 18,000 years ago. [ [http://archaeology.about.com/od/cterms/g/climap.htm Archaeology page on About.com website, accessed April 19, 2008] ]

Hays is probably best known as a co-author of the "Hays, Imbrie and Shackleton" paper in "Science" [cite journal
author = Hays, J.D.
coauthors = Imbrie, J.; Shackleton, N.J.
year = 1976
title = Variations in the Earth's Orbit: Pacemaker of the Ice Ages
journal = Science
volume = 194
issue = 4270
pages = 1121-1132
doi = 10.1126/science.194.4270.1121] in 1976, "Variations in the Earth's orbit: Pacemaker of the ice ages." Using ocean sediment cores, the "Science" paper verified the theories of Milutin Milanković that oscillations in climate can be correlated with Earth's orbital variations of eccentricity, axial tilt, and precession around the Sun (see Milankovitch cycles).

ee also

*Ice ages
*Geology

References