Professor Jesse Kroll, postdoctoral associate Eben Cross and graduate student Jon Franklin are doing fieldwork this summer at a site in the Talladega National Forest in Alabama as part of the National Science Foundation’s Southeast Atmosphere Study (SAS), an umbrella study comprising five projects undertaken by scientists from 30 research institutions. The goal of the SAS is to learn more about the processes that control biosphere-atmosphere interactions affecting regional climate and air quality in the southeastern United States, one of the few places in the world that has cooled during the last century. At the field site Kroll’s team is looking at the chemical reactions between anthropogenic air pollution and the organic compounds emitted by trees. Read a news release.