BBAuthors: Sarwar, Golam; Advisor: -; Participants: Gantt, Brett; Foley, Kristen; Fahey, Kathleen; Spero, Tanya L.; Kang, Daiwen; Mathur, Rohit; Foroutan, Hosein; Xing, Jia; Sherwen, Tomás; Saiz-Lopez, Alfonso (2019)
Bromine and iodine chemistry has been updated in the Community Multiscale Air Quality (CMAQ) model to better capture the influence of natural emissions from the oceans on ozone concentrations. Annual simulations were performed using the hemispheric CMAQ model without and with bromine and iodine chemistry. Model results over the Northern Hemisphere show that including bromine and iodine chemistry in CMAQ not only reduces ozone concentrations within the marine boundary layer but also aloft and inland. Bromine and iodine chemistry reduces annual mean surface ozone over seawater by 25%, with lesser ozone reductions over land. The bromine and iodine chemistry decreases ozone concentration ... 
