Mar. 2, 2012 - Naturalist Nights Winter Speaker Series 2012 - Presenter Jeff Deems, hydrologist and snow scientist Hosted by Aspen Center for Environmental Studies (ACES), Wilderness Workshop and Roaring Fork Audubon Society You are here:Home#River Blogs#North America#Colorado#Colorado Headwaters#Beetles, Dust and Climate Change: Changing Hydrology in the Colorado River Headwaters