Vertical Profiles of Aerosol Extinction Over the Southeastern US during the Summer. NICK WAGNER, Charles Brock, Timothy Gordon, Daniel Lack, Mathews Richardson, Daniel Law, André Welti, Ann M. Middlebrook, Jin Liao, John Holloway, Jeff Peischl, Ilana Pollack, Thomas Ryerson, Martin Graus, Carsten Warneke, NOAA Earth System Research Laboratory, Boulder, CO