Articles | Volume 22, issue 22
Research article
15 Nov 2022
Research article |  | 15 Nov 2022

Comparison of model and ground observations finds snowpack and blowing snow aerosols both contribute to Arctic tropospheric reactive bromine

William F. Swanson, Chris D. Holmes, William R. Simpson, Kaitlyn Confer, Louis Marelle, Jennie L. Thomas, Lyatt Jaeglé, Becky Alexander, Shuting Zhai, Qianjie Chen, Xuan Wang, and Tomás Sherwen

Data sets

Atmospheric measurements via Multiple Axis Differential Optical Absorption Spectroscopy (MAXDOAS), Utqiagvik (Barrow), Alaska 2012-2018 William Simpson

The Collaborative O-Buoy Project: Deployment of a Network of Arctic Ocean Chemical Sensors for the IPY and beyond Donald Perovich, Patricia Matrai, Paul Shepson, William Simpson, and Francisco Chavez

Model code and software

GEOS-Chem 12.9.3 The International GEOS-Chem User Community

Short summary
Radical bromine molecules are seen at higher concentrations during the Arctic spring. We use the global model GEOS-Chem to test whether snowpack and wind-blown snow sources can explain high bromine concentrations. We run this model for the entire year of 2015 and compare results to observations of bromine from floating platforms on the Arctic Ocean and at Utqiaġvik. We find that the model performs best when both sources are enabled but may overestimate bromine production in summer and fall.
Final-revised paper