Aircraft and satellite derived arctic BrO profiles of the tropospheric column ...

• Main Authors: Choi, Su-Jin, Wang, Yujie, Salawitch, Ross J, Canty, T, Joiner, J, Zeng, T, Kurosu, T P, Chance, K, Richter, Astrid, Huey, L G, Liao, Jingjuan, Neuman, J A, Nowak, J B, Dibb, J E, Weinheimer, A J, Diskin, G S, Ryerson, T B, da Silva, A, Curry, J, Kinnison, D, Tilmes, S, Levelt, P F
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2012
• Subjects: Multiple investigations; International Polar Year 2007-2008 IPY; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Arctic; Antarctic; Antarc*; International Polar Year; IPY; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.847307; https://doi.pangaea.de/10.1594/PANGAEA.847307

We derive tropospheric column BrO during the ARCTAS and ARCPAC field campaigns in spring 2008 using retrievals of total column BrO from the satellite UV nadir sensors OMI and GOME-2 using a radiative transfer model and stratospheric column BrO from a photochemical simulation. We conduct a comprehensive comparison of satellite-derived tropospheric BrO column to aircraft in-situ observations of BrO and related species. The aircraft profiles reveal that tropospheric BrO, when present during April 2008, was distributed over a broad range of altitudes rather than being confined to the planetary boundary layer (PBL). Perturbations to the total column resulting from tropospheric BrO are the same magnitude as perturbations due to longitudinal variations in the stratospheric component, so proper accounting of the stratospheric signal is essential for accurate determination of satellite-derived tropospheric BrO. We find reasonably good agreement between satellite-derived tropospheric BrO and columns found using ... : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 ...