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Comparison Study of Optical Properties During the Aerosol IOP from Multiple Aircraft Platforms

Hallar, Anna NASA Ames Research Center
Strawa, Anthony Ames Research Center
Schmid, Beat Bay Area Environmental Research Institute
Andrews, Betsy NOAA/CMDL
Ogren, John NOAA/CMDL
Ferrare, Richard NASA Langley Research Center
Covert, David University of Washington
Elleman, Robert University of Washington

In May 2003, a flight mission was conducted as part of the Aerosol Intensive Operating Period (IOP) from the ARM Southern Great Plains Site in north central Oklahoma. Due to the coordinated flight paths of the CIRPAS Twin Otter and the IAP Cessna aircraft during the Aerosol IOP, several simultaneous in situ datasets are available for comparison. Four coordinated flights were accomplished.

One objective of the IOP was to measure aerosol optical properties (scattering, absorption, and extinction) using a number of different instruments. This paper will examine comparisons between the measurement of optical extinction and scattering during time periods in which the Cessna and the Twin Otter aircraft flew in formation. Observations from several instruments are discussed in this paper including Cadenza (NASA Ames Research Center), three wavelength nephelometers and absorption photometers (University of Washington and Climate Monitioring and Diagnostics Laboratory [CMDL]).

This poster will be displayed at the ARM Science Team Meeting.