Four people stand on an inflatable raft in a body of water holding to a large piece of scientific equipment.

GeoCal researchers excavating sediment cores from the Mel3 lake site. (Courtesy of Peter Puleo/GeoCAL)

Northwestern University
Tubes of Greenland sediment cores reveal thousands of years of climate change clues for Ph.D. students in Northwestern University’s GeoCAL, the Geoperspective on Climate and Life, laboratory.
National Science Foundation
Over time, warming events in Greenland and the North Atlantic were followed by gradual cooling. These changes correlate well with the concentration of nitrous oxide found in ice core samples. Antarctic temperature variations, on the other hand, were... Read More