Gergana Mouteva did an excellent job presenting her Ph.D. thesis during the first week of December. Gergana developed a method for measuring the black carbon concentration and radiocarbon content of aerosol samples. She then applied this technique to study wildland fires in Alaska and the source composition of aerosols in a polluted urban environment in Utah. Gergana was co-advised by Claudia Czimczik and Jim Randerson. A very nice result from Gergana’s Alaskan wildfire study was the development of a new approach for estimating fire carbon emissions by combining aerosol and soil profile isotope measurements. A link to her paper, published in Global Biogeochemical Cycles, can be found here.