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Keeling curve: An oscillating and steadily rising line graph showing the increasing concentration of atmospheric carbon dioxide as measured at Mauna Loa, Hawaii; named after Dr. Charles Keeling (Scripps Institution of Oceanography), who initiated the measurements in 1958.
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Tom Skilling is chief meteorologist at WGN-TV. His forecasts can be seen Monday through Friday on WGN-TV News at noon and 9 p.m.
WGN-TV meteorologists Steve Kahn, Richard Koeneman and Paul Dailey plus weather producer Bill Snyder contribute to this page.
