Abstract Project: AWIPEV_0035

Bj rn-Martin Sinnhuber (KIT)

The BromoPole project aims at improving our understanding of the mechanisms of polar bromine explosion and ozone depletion events and their interaction with the cryosphere through model simulations and field observations. Tropospheric ozone is after carbon dioxide and methane the most important greenhouse gas and affects air quality with implications for health and eco systems. Within BromoPole we will test a new hypothesis that accumulated bromine deposition from the gas phase onto the snow surface may play an important role for bromine explosion events. To this end we will perform new analyses of long-term snow samples taken in Ny-Alesund, together with new additional measurements on glaciers in the vicinity of Ny-Alesund. Based on this improved process understanding we will perform model simulations to investigate the impact of polar bromine chemistry on tropospheric ozone on the regional to global scale.