International Geophysical Year

The International Geophysical Year (IGY) spanned July 1957 to December 1958. Although the world was in the middle of the Cold War, 67 countries came together to undertake a comprehensive series of global geophysical activities around the globe, making the campaign a successful example of international scientific collaboration. As part of IGY, Charles Keeling from Scripps Institution of Oceanography began monitoring atmospheric carbon dioxide atop Hawaii’s Mauna Loa. Soon those measurements' upward climb would alert the world to the threat of human-caused greenhouse gases and global warming.