| B.J. Huebert, A.C. Clarke, L. Zhuang, and J. Porter Department of Oceanography University of Hawaii Honolulu, HI 96822 808-956-6896 huebert@hokulea.soest.hawaii.edu |
K.J. Noone, S. Howell, and K.B. Noone Center for Atmospheric Chemistry Studies Graduate School of Oceanography University of Rhode Island Narragansett, Rl 02882 401-792-6622 |
| A. Bandy, D. Thornton, and B. Blomquist Department of Chemistry Drexel University Philadelphia, PA 19104 215-95 2640 A.BANDY/OMNET |
A. Pszenny
NOAA/AOML/OCD 4301 Rickenbacker Causeway Miami, FL 33149-1026 305-361-4388 A.PSZENNY/OMNET |
During the June, 1992 ASTEX/MAGE experimental program in the Azores we studied the evolution of marine boundary layer chemistry using a Lagrangian strategy. On two occasions we tagged air parcels by launching constant-volume balloons carrying GPS receivers from the R/V Oceanus. Perfluorinated tracers were also released into the tagged air. We then repeatedly sampled in the vicinity of the balloons from aircraft for a period of almost two days, observing the evolution of gas and aerosol chemistry, cloud microphysics, and boundary layer structure with time. The NOAA ship Malcolm Baldrige characterized the air at the end of the trajectories.
We have determined the principal terms in both the total ammonia and
non-seasalt sulfate budgets during the two days we followed a polluted European
air mass. From the ammonia budget we have estimated the surface emission of
ammonia vapor. We have also evaluated the inert tracer data, and have
confirmed that some tracer was present in the target air at the end of the
two-day trajectory.