HR: 0800h
AN: A41B-0042    [Abstracts]
TI: Distributions of, and Relationships Between, Nitric Acid and Ozone in the UT/LS Over Eastern North America During PAVE
AU: Scheuer, E
EM: eric.scheuer@unh.edu
AF: CCRC/EOS University of New Hampshire, Morse Hall 39 College Road, Durham, NH 03824 United States
AU: * Dibb, J E
EM: jack.dibb@unh.edu
AF: CCRC/EOS University of New Hampshire, Morse Hall 39 College Road, Durham, NH 03824 United States
AU: Avery, M
EM: m.a.avery@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 483, Hampton, VA 23681 United States
AB: In-situ measurements of nitric acid and ozone were made from the NASA DC-8 during the Polar Aura Validation Experiment in January/February 2005. Except in the boundary layer (where nitric acid was enhanced while ozone mixing ratios were low), there was strong correlation between these two trace gases. The positive correlations between nitric acid and ozone persisted at all scales, ranging from the 100 second resolution of the nitric acid measurements (approximately 15 horizontal km or 0.5 vertical km at typical DC-8 velocities) to the entire study region. Spatial variations in the relationship are examined to assess the impact of stratospheric circulation, stratosphere/troposphere exchange, ozone depletion, and redistribution of nitric acid (through PSC formation and sedimentation) on the observed distributions of these tracers.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0340 Middle atmosphere: composition and chemistry
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005