Airborne Observations of Enhanced Marine Boundary Layer Carbon Monoxide over Remote Tropical Oceans

Tuesday, 16 December 2014
Teresa Lynn Campos1, Meghan H Stell2, Eric C Apel1, Rebecca S Hornbrook3, Alan J Hills3, Andrew John Weinheimer3, Denise Montzka1, Lisa Kaser1 and Janine Aquino4, (1)National Center for Atmospheric Research, Boulder, CO, United States, (2)National Center for Atmospheric Research, Broomfield, CO, United States, (3)NCAR, Boulder, CO, United States, (4)National Center for Atmospheric Research, Earth Observing Laboratory, Boulder, CO, United States
Recent airborne observations of tropical marine boundary layer carbon monoxide included several instances of elevated MBL CO with a notable absence of corresponding enhancements in ozone. Instances were observed during the recent CONTRAST exploration of tropical Pacific marine dynamics and composition. The lack of correlation between sampled carbon monoxide and ozone is consistent with an oceanic source of CO. Carbon monoxide vertical flux will be estimated for all CONTRAST boundary layer transects, with particular focus on these events. Complementary correlative observations of trace organics lend insight into processes defining this composition. The frequency of occurrence will be presented along with comparison to similar observations within other data sets, including TORERO (2012), and HIPPO (2009-2012).