Measurement and Characterization of Selected Organic Gases and Aerosol
Composition during TRACE-P

PI's
E. Atlas and F. Flocke, NCAR

Proposed Investigation:

Activity 1: Gas-phase organic measurement.

1) Continue collaboration with the UCI group to maintain continuity in the
measurement of organic nitrates, HCFC's, HFCs, and selected halocarbons.

2) Using NCAR analytical protocol, measure organic nitrates, HCFC's, HFC's,
and halocarbons on a subset (5-10%) of samples (from both P3 and DC8
aircraft) collected by UCI.

3) Based on the target compound analyses, or other inflight criteria,
select representative samples for full-scan GC/MS characterization of
organic constituents

Activity 2: Aerosol organic measurements.

1) Prepare suitable sample substrates and hardware for collection of
organic aerosols using the UNH Aerosol Probe

2) In collaboration with the UNH group, collect samples for organic
analysis during selected flight segments representative of different
outflow and background regimes.

3) Using appropriate extraction, derivatization, and separation techniques,
analyze samples for selected lipid class and water soluble organic components

4) On larger volume samples, collected at ground sites, further
characterize the water soluble organic species using selective
derivatization and GC/MS/MS techniques.

Elliot Atlas                NCAR/Atmospheric Chemistry

Ph: 303-497-1425    Fax: 303-497-1477