A21B-0126
A Reevaluation of the Contribution of Very Short Lived Bromocarbons to Stratospheric Bromine Loading

Tuesday, 15 December 2015
Poster Hall (Moscone South)
Pam Wales1, Ross J Salawitch2, Timothy P Canty1, George H Mount3, Elena Spinei4, Raid M Suleiman5, Kelly Chance6, Richard D McPeters4, Pawan K Bhartia4, Thomas p Kurosu7, William R Simpson8, Deanna Donohoue9, Bryan J Johnson10, Douglas E Kinnison11, Simone Tilmes12, Sungyeon Choi13 and Joanna Joiner14, (1)University of Maryland College Park, College Park, MD, United States, (2)University of Maryland, College Park, MD, United States, (3)Washington State University, Pullman, WA, United States, (4)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (5)Harvard-Smithsonian Astrophys, Cambridge, MA, United States, (6)Harvard-Smithsonian, Cambridge, MA, United States, (7)NASA Jet Propulsion Laboratory, Pasadena, CA, United States, (8)University of Alaska Fairbanks, Fairbanks, AK, United States, (9)Lawrence University, Appleton, WI, United States, (10)NOAA Boulder, ESRL/GMD, Boulder, CO, United States, (11)National Center for Atmospheric Research, Boulder, CO, United States, (12)Univ. of Leeds, Leeds, United Kingdom, (13)Science Systems and Applications, Inc., Lanham, MD, United States, (14)NASA Goddard SFC, Greenbelt, MD, United States
Abstract:
The Aura Ozone Monitoring Instrument (OMI) has provided global measurements of total column BrO over the past decade. Interpreting the distribution of total column BrO between the stratosphere and troposphere depends strongly on the contribution of very short lived (VSL) bromocarbons to stratospheric inorganic bromine (Bry). Salawitch et al. (2010) suggested 7 to 12 ppt of Bry must be supplied to the lower stratosphere from the decomposition of VSL bromocarbons to accurately represent the variation of total column OMI BrO with total column O3. Here we will re-evaluate this recommendation in light of ground-based total column BrO measurements obtained over Fairbanks, Alaska using a multifunction differential optical absorption spectroscopy (MFDOAS) instrument during the spring of 2011. Additionally, we will assess how modifications to kinetics regulating the partitioning between BrO and BrONO2 proposed by Kreycy et al. (2013) affect the VSL Bry estimate as well as the modeled diurnal variation in BrO.

References

Kreycy, S. et al. Atmos. Chem. Phys. 2013, 13, 6263-6274, doi:10.5194/acp-13-6263-2013.

Salawitch, R.J. et al. Geophys. Res. Lett. 2010, 37, L21805, doi:10.1029/2010GL043798.

<< Previous Abstract | Next Abstract >>