Classic: Ralph Cicerone, Roles for Scientists (2009)

Ralph Cicerone (1943-2016), former President of the National Academy of Sciences outlines the challenges of climate change and the roles that science and scientists must play in meeting them. Series: “Roger Revelle Centennial Symposium” Source: University of California Television (UCTV) https://www.youtube.com/watch?time_continue=1&v=4cXsmckZKas Ralph Cicerone, former president of the National Academy of Sciences, has passed away at…

Newly discovered Mesospheric Polar Clouds possible indicator of Global Warming

The Aeronomy of Ice in the Mesosphere (AIM) mission is the first satellite dedicated to the study of noctilucent clouds. Noctilucent clouds, sometimes called Polar Mesospheric Clouds, were first reported in 1885. Forming at altitudes above 50 miles, they are so faint that they can only be seen from the ground in the reflected light…

Last Time Carbon Dioxide Levels Were This High: 15 Million Years Ago

By analyzing the chemistry of bubbles of ancient air trapped in Antarctic ice, scientists have been able to determine the composition of Earth’s atmosphere going back as far as 800,000 years, and they have developed a good understanding of how carbon dioxide levels have varied in the atmosphere since that time. But there has been…