In 2006, a team of NCAR researchers convened in Mexico City for MIRAGE, a study of the chemical and physical transformation of air pollution in urban areas and its impact on air quality, ecosystems, and climate. Another MIRAGE field campaign kicks off this month, this time in Shanghai, China's largest city.

When you've been studying the ways of the atmosphere since the 1930s, you have many tales to tell. Joachim Kuettner has been sharing his life stories, including some lesser-known ones, in a new round of oral and video histories.