Stratospheric Injection of Bromine from Very Short Lived (VSL) Sources Inferred from CONTRAST

ROSS SALAWITCH; ELLIOT ATLAS; CONTRAST SCIENCE TEAM; RAFAEL PEDRO FERNÁNDEZ

San Francisco

Conferencia; American Geophysical Union Fall Meeting - (AGU-2014); 2014

American Geophysical Union

The CONvective TRansport of Active Species in the Tropics (CONTRAST) field campaign was designed to quantify the abundance of very short lived (VSL) bromocarbons in the marine boundary layer (MBL) of the  Tropical Western Pacific, the variation with respect to altitude of these compounds from the MBL to the base of the tropopause transition layer, and the abundance of BrO that is formed as VSL bromocarbons decompose. We?ll examine the theoretical understanding of total bromine in the VSL source gases by comparing measurements from two instruments, AWAS and TOGA, to model values found using CAM-Chem. We?ll also examine the consistency between tropospheric loss of the compounds and the appearance of products using observations of BrO from two other instruments, CIMS and DOAS. Finally, implications for stratospheric supply of bromine via both Source Gas Injection and  Product Gas Injection will be described.