Surface fluxes of bromoform and dibromomethane over the tropical western Pacific inferred from airborne in situ measurements

Feng, Liang; Palmer, Paul I.; Butler, Robyn; Andrews, Stephen J.; Atlas, Elliot L.; Carpenter, Lucy J.; Donets, Valeria; Harris, Neil R. P.; Salawitch, Ross J.; Pan, Laura L.; Schauffler, Sue M.

doi:https://doi.org/10.5194/acp-18-14787-2018

Articles | Volume 18, issue 20

https://doi.org/10.5194/acp-18-14787-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-18-14787-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 20

Research article

|

15 Oct 2018

Research article |

| 15 Oct 2018

Surface fluxes of bromoform and dibromomethane over the tropical western Pacific inferred from airborne in situ measurements

Liang Feng, Paul I. Palmer, Robyn Butler, Stephen J. Andrews, Elliot L. Atlas, Lucy J. Carpenter, Valeria Donets, Neil R. P. Harris, Ross J. Salawitch, Laura L. Pan, and Sue M. Schauffler

Data sets

Co-ordinated Airborne Studies in the Tropics (CAST) P. Braesicke, N. Harris, J. A. Pyle, A. Robinson, and G. Vaughan http://catalogue.ceda.ac.uk/uuid/565b6bb5a0535b438ad2fae4c852e1b3

Short summary

We infer surface fluxes of bromoform (CHBr₃) and dibromoform (CH₂Br₂) from CAST and CONTRAST aircraft observations over the western Pacific, using a tagged version of the GEOS-Chem global 3-D atmospheric chemistry model and a Maximum A Posteriori inverse model. Using the aircraft data, we estimate the regional fluxes about 20–40 % smaller than the prior inventories by Ordóñez et al. (2012). We find no evidence to support a robust linear relationship between CHBr₃ and CH₂Br₂ oceanic emissions.