Optical Properties of Atmospherically Aged Tar Balls from the Free Troposphere

Susan Mathai1, Zezhen Cheng2, Daniel Veghte3, Silvia Bucci4, Libor Kovarik2, Claudio Mazzoleni1, Tyler Capek1, Angela Marinoni5 and Swarup China2, (1)Michigan Technological University, Physics, Houghton, MI, United States, (2)Pacific Northwest National Laboratory, Richland, WA, United States, (3)Ohio state university, Ohio, United States, (4)LMD-CNRS, Paris, France, (5)CNR Institute of Atmospheric Sciences and Climate, Bologna, Italy