A34F-01
Arctic Ozone and Bromine Chemistry: Relationships with Snow Composition and Open Lead Presence
Wednesday, 16 December 2015: 16:00
3010 (Moscone West)
Kerri Pratt1, Peter Peterson2, Mark Hartwig2, Nathaniel May3, William R Simpson4, Denis Pöhler5, Johannes Zielcke5, Udo Friess6, Stephan General6, Ulrich Platt6, Paul B Shepson7, Ignatius G Rigor8, Son V Nghiem9, Michael Steele10 and James Morison11, (1)University of Michigan Ann Arbor, Department of Chemistry and Department of Earth & Environmental Sciences, Ann Arbor, MI, United States, (2)University of Michigan Ann Arbor, Ann Arbor, MI, United States, (3)University of Michigan, Ann Arbor, MI, United States, (4)University of Alaska Fairbanks, Fairbanks, AK, United States, (5)University of Heidelberg, Institute for Environmental Physics, Heidelberg, Germany, (6)University of Heidelberg, Heidelberg, Germany, (7)Purdue University, West Lafayette, IN, United States, (8)Applied Physics Laboratory University of Washington, Kenmore, WA, United States, (9)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States, (10)Applied Physics Laboratory University of Washington, Seattle, WA, United States, (11)Polar Science Center, Seattle, WA, United States
Abstract:
Unique atmospheric bromine photochemistry has been shown to be initiated from bromide oxidation in the surface snowpack in the Arctic. With increasing first-year sea ice and lead formation in the Arctic, the snow surface across the region is changing, and there is an urgent need to characterize how the changing snow and ice surface is impacting atmospheric composition. The spatial distributions of ozone and bromine monoxide were measured during aircraft measurements during the 2012 Bromine, Ozone, and Mercury EXperiment (BROMEX) near Barrow, Alaska. Comparisons to sea ice imagery were completed, as well as measurement of melted snow pH and ionic snow composition. From the snow chemistry, we suggest the ability of various surfaces to initiate bromine activation and relate this to the observed variability in the spatial distribution of BrO. These results provide insights into future ozone and bromine chemistry in the changing Arctic region.
