HR: 1340h
AN: A13C-0944 [Abstracts]
TI: Comparisons of Aerosol Phase Sulfate, Nitrate, and Ammonium Concentrations Measured by an Aerodyne
Aerosol Mass Spectrometer and a Particle Into Liquid Sampler
AU: * Bahreini, R
EM: Roya.Bahreini@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway
R/Al 7, Boulder, CO 80305
United States
AU: * Bahreini, R
EM: Roya.Bahreini@noaa.gov
AF: University of Colorado, CIRES, 216 UCB, Boulder, CO 80309
United States
AU: Matthew, B M
EM: Brendan.Matthew@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway
R/Al 7, Boulder, CO 80305
United States
AU: Matthew, B M
EM: Brendan.Matthew@noaa.gov
AF: University of Colorado, CIRES, 216 UCB, Boulder, CO 80309
United States
AU: Middlebrook, A M
EM: Ann.M.Middlebrook@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway
R/Al 7, Boulder, CO 80305
United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: NOAA Aeronomy Laboratory, 325 Broadway
R/Al 7, Boulder, CO 80305
United States
AU: Fehsenfeld, F C
EM: Fred.C.Fehsenfeld@noaa.gov
AF: University of Colorado, CIRES, 216 UCB, Boulder, CO 80309
United States
AU: Peltier, R
EM: rick.peltier@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA 30332
United States
AU: Weber, R
EM: rweber@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA 30332
United States
AU: Schulz, K
EM: Kristen.Schulz@noaa.gov
AF: NOAA-PMEL, 7600 Sand Point Way NE, Seattle, WA 98115
United States
AU: Quinn, P K
EM: Patricia.K.Quinn@noaa.gov
AF: NOAA-PMEL, 7600 Sand Point Way NE, Seattle, WA 98115
United States
AB:
The Aerodyne Aerosol Mass Spectrometer (AMS) provides mass concentration and mass distribution of non-refractory components
of submicron aerosols. However, particle transmission and collection efficiency factors have been observed to be less than
unity and dependent on size and composition of aerosols. The losses are due to particle impaction in the AMS inlet and
aerodynamic lens systems and bounce of particles on the AMS vaporizer. It is crucial then to correct the AMS measurements and
account for less than unity transmission/collection efficiency factors before the data are made available to the wider
community interested in such measurements.
Here we discuss the aircraft-based measurements, made during the International Consortium for Atmospheric Research on
Transport and Transformation (ICARTT) field study during July-August 2004, as well as ground-based measurements, made during
Mesa-2005 study during January-February 2005 in Boulder, Co. The methodology of applying size dependant and size-composition
dependant correction factors, determined in the laboratory by sampling pure ammonium nitrate as well as internally mixed
ammonium nitrate-ammonium sulfate particles, is described. Comparisons made with Particle Into Liquid Sampler (PILS)
measurements reveal that the correlations between AMS and PILS sulfate, nitrate, and ammonium concentrations improve to a
great extent after such corrections are applied.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0365 Troposphere: composition and chemistry
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005