In 1979, a top climate scientist said that an increase in Antarctic sea ice could lead to a new ice age.
New York Times - January 8, 1979 Excerpts: Dr. James D. Hays, of the Lamont-Dougherty Geological Observatory at Columbia University, cited the suspected relationship of ice-age onsets to cyclic changes in the orbit and spin of the earth, which imply a new cooling within the next thousand years...past changes between glacial and interglacial climate periods were abrupt -- within 300 years or much less. Dr. Hays urged a close watch be kept on earth satellites on the extent of summer ice. Most of the sea ice around Antarctica melts in summer but if it became extensive this would reflect much solar energy back into space, cooling the climate."
Experts Tell How Antarctic’s Ice Could Cause Widespread Floods – Mushy Ice Beneath Sheet – Article – NYTimes.com
Since he made this forecast, Antarctic sea ice has increased to record levels.