Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 45: Poster: Solid-Liquid Interfaces - Structure, Spectroscopy, Reactions and Electrochemistry
O 45.2: Poster
Dienstag, 13. März 2018, 18:15–20:30, Poster A
Characterization and Chemical Imaging of Aerosols from remote Antarctica — •Johannes Weis1,2,6, Ricardo H. M. Godoi1,3, Ana F. L. Godoi1,3, Simon Mueller1,2, Sérgio J. Gonçalves Jr.3, Heitor Evangelista4, Swarup China5, Bingbing Wang5, Alexander Laskin5, Tristan H. Harder6, and Mary K. Gilles1 — 1Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA — 2Department of Chemistry, University of California, Berkeley, CA 94720, USA — 3Department of Environmental Engineering, Federal University of Paran UFPR, Curitiba, PR, Brazil — 4LARAMG, State University of Rio de Janeiro Uerj, Rio de Janeiro, RJ, Brazil — 5William R. Wiley Environmental and Molecular Science Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, USA — 6Department of Physics, University of Würzburg, Germany
Changes in Antarctica's ice sheets and shelves are of primary concern to the regional and global climate. We hypothesize that the West Antarctic warming can be related to the aerosols transported and formed in this region. Internal composition and characteristics of single aerosol particles were investigated by means of chemical mapping via synchrotron-based scanning transmission X-ray microscopy with near edge X-ray absorption fine structure spectroscopy (STXM/NEXAFS), followed by a rule-based cluster classification. Complementary data obtained from computer-controlled scanning electron microscopy (CCSEM/EDX) allows us to go a step forward in the understanding of aerosol particles formed in Antarctica's pristine environment.