The transport processes across the tropical tropopause layer (TTL) combines slow advection with both microphysical and convective processes. The bromine budget of the stratosphere can not be reconciled with ground-based, balloon or satellite bromine monoxide (BrO) measurements using long-lived bromine containing substances alone. Much recent modeling work has invested the contribution of the very short-lived bromine substances bromoform (CHBr3) and combined with dibromomethane (CH2Br2) upon the stratospheric Bry budget. In this talk we examine these very short lived (VSL) as well as long-lived bromine species including their interaction of the water vapor transport processes through the TTL. Lagrangian back trajectories are initiated in the stratosphere and convection is parameterized using the ERA-Interim detrainment rates. We present the transport of the VSL bromine in a conceptualized form and investigate sensitivities to the general chemical, microphysical and convective processes that result in VSL bromine contributing to the total stratospheric bromine budget.
Helmholtz Research Programs > PACES I (2009-2013) > TOPIC 1: The Changing Arctic and Antarctic > WP 1.2: Aerosol, Water Vapour, and Ozone Feedbacks in the Arctic Climate System