Articles | Volume 17, issue 16
https://doi.org/10.5194/acp-17-9917-2017
https://doi.org/10.5194/acp-17-9917-2017
Research article
 | 
23 Aug 2017
Research article |  | 23 Aug 2017

Modeling the inorganic bromine partitioning in the tropical tropopause layer over the eastern and western Pacific Ocean

Maria A. Navarro, Alfonso Saiz-Lopez, Carlos A. Cuevas, Rafael P. Fernandez, Elliot Atlas, Xavier Rodriguez-Lloveras, Douglas Kinnison, Jean-Francois Lamarque, Simone Tilmes, Troy Thornberry, Andrew Rollins, James W. Elkins, Eric J. Hintsa, and Fred L. Moore

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Subject: Gases | Research Activity: Atmospheric Modelling and Data Analysis | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Aschmann, J., Sinnhuber, B.-M., Chipperfield, M. P., and Hossaini, R.: Impact of deep convection and dehydration on bromine loading in the upper troposphere and lower stratosphere, Atmos. Chem. Phys., 11, 2671–2687, https://doi.org/10.5194/acp-11-2671-2011, 2011.
Bauer, R., Rozanov, A., McLinden, C. A., Gordley, L. L., Lotz, W., Russell III, J. M., Walker, K. A., Zawodny, J. M., Ladstätter-Weißenmayer, A., Bovensmann, H., and Burrows, J. P.: Validation of SCIAMACHY limb NO2 profiles using solar occultation measurements, Atmos. Meas. Tech., 5, 1059–1084, https://doi.org/10.5194/amt-5-1059-2012, 2012.
Blake, N. J., Blake, D. R., Chen, T. Y., Collins, J. E., Sachse, G. W., Anderson, B. E., and Rowland, F. S.: Distribution and seasonality of selected hydrocarbons and halocarbons over the western Pacific basin during PEM-West A and PEM-West B, J. Geophys. Res.-Atmos., 102, 28315–28331, 1997.
Blake, N. J., Blake, D. R., Wingenter, O. W., Sive, B. C., McKenzie, L. M., Lopez, J. P., Simpson, I. J., Fuelberg, H. E., Sachse, G. W., and Anderson, B. E.: Influence of southern hemispheric biomass burning on midtropospheric distributions of nonmethane hydrocarbons and selected halocarbons over the remote South Pacific, J. Geophys. Res.-Atmos., 104, 16213–16232, 1999.
Blake, N. J., Blake, D. R., Simpson, I. J., Lopez, J. P., Johnston, N. A., Swanson, A. L., Katzenstein, A. S., Meinardi, S., Sive, B. C., and Colman, J. J.: Large-scale latitudinal and vertical distributions of NMHCs and selected halocarbons in the troposphere over the Pacific Ocean during the March–April 1999 Pacific Exploratory Mission (PEM-Tropics B), J. Geophys. Res.-Atmos., 106, 32627–32644, 2001.
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Short summary
Inorganic bromine (Bry) plays an important role in ozone layer depletion. Based on aircraft observations of organic bromine species and chemistry simulations, we model the Bry abundances over the Pacific tropical tropopause. Our results show BrO and Br as the dominant species during daytime hours, and BrCl and BrONO2 as the nighttime dominant species over the western and eastern Pacific, respectively. The difference in the partitioning is due to changes in the abundance of O3, NO2, and Cly.
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