Stratospheric BrO abundance measured by a balloon-borne submillimeterwave radiometer

Stachnik, R. A.; Millán, L.; Jarnot, R.; Monroe, R.; McLinden, C.; Kühl, S.; Puķīte, J.; Shiotani, M.; Suzuki, M.; Kasai, Y.; Goutail, F.; Pommereau, J. P.; Dorf, M.; Pfeilsticker, K.

Measurements of mixing ratio profiles of stratospheric bromine monoxide (BrO) were made using observations of BrO rotational line emission at 650.179 GHz by a balloon-borne SIS (superconductor-insulator-superconductor) submillimeterwave heterodyne limb sounder (SLS). The balloon was launched from Ft. Sumner, New Mexico (34° N) on 22 September 2011. Peak mid-day BrO abundance varied from 16 ± 2 ppt at 34 km to 6 ± 4 ppt at 16 km. Corresponding estimates of total inorganic bromine (Br y), derived from BrO vmr (volume mixing ratio) using a photochemical box model, were 21 ± 3 ppt and 11 ± 5 ppt, respectively. Inferred Br y abundance exceeds that attributable solely to decomposition of long-lived methyl bromide and other halons, and is consistent with a contribution from bromine-containing very short lived substances, Br yVSLS, of 4 ppt to 8 ppt. These results for BrO and Br y were compared with, and found to be in good agreement with, those of other recent balloon-borne and satellite instruments.



Stachnik, R. A. / Millán, L. / Jarnot, R. / et al: Stratospheric BrO abundance measured by a balloon-borne submillimeterwave radiometer. 2013. Copernicus Publications.


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