August 4, 2010 | During the week of June 15–18, more than 70 upper-atmosphere researchers looked back—and up—at the history and current state of research on climate change in the stratosphere, mesosphere, thermosphere, and ionosphere. The week was capped by a daylong symposium on June 19 in honor of HAO’s Ray Roble, who recently retired and is now a senior scientist emeritus.









