HR: 1340h
AN: A13C-0939    [Abstracts]
TI: ICARTT Measurement Comparison of Dry Particle Size Distributions: NASA DC-8 vs. NOAA WP-3D
AU: * Chen, G
EM: gao.chen-1@nasa.gov
AF: NASA Langley Research Center, Mail Stop 401B, Hampton, VA 23681 United States
AU: Brock, C
EM: Charles.A.Brock@noaa.gov
AF: NOAA AL, 325 Broadway R/AL7, Boulder, CO 80305 United States
AU: Clarke, A
EM: tclarke@soest.hawaii.edu
AF: University of Hawaii, Department of Oceanography 1000 Pope Rd , Honolulu, HI 96822 United States
AU: Shinozuka, Y
EM: yohei@hawaii.edu
AF: University of Hawaii, Department of Oceanography 1000 Pope Rd , Honolulu, HI 96822 United States
AU: McNaughton, C
EM: cameronm@soest.hawaii.edu
AF: University of Hawaii, Department of Oceanography 1000 Pope Rd , Honolulu, HI 96822 United States
AU: Wollny, A
EM: awollny@al.noaa.gov
AF: University of Hawaii, Department of Oceanography 1000 Pope Rd , Honolulu, HI 96822 United States
AU: Anderson, B
EM: Bruce.E.Anderson@nasa.gov
AF: NASA Langley Research Center, Mail Stop 401B, Hampton, VA 23681 United States
AU: Thornhill, k L
EM: K.L.THORNHILL@LaRC.NASA.GOV
AF: SAIC/NASA Langley Research Center, 1 Enterprise Pkwy Suite 300, Hampton, VA 23666 United States
AU: Ryerson, T
EM: Thomas.B.Ryerson@noaa.gov
AF: NOAA AL, 325 Broadway R/AL7, Boulder, CO 80305 United States
AU: Weber, R
EM: rweber@eas.gatech.edu
AF: Georgia Institute of Technology, School of Earth & Atmospheric Sciences 311 Ferst Drive, Atlanta, GA 30332 United States
AU: Brune, W
EM: brune@essc.psu.edu
AF: Pennsylvania State University, Department of Meteorology 504 Walker Building, University Park, PA 16802 United States
AB: Particle number densities and size distributions are fundamental aerosol microphysical properties from which climatic effects and chemical transformations can be derived. For these reasons, these parameters were measured aboard the airborne platforms deployed during the NASA INTEX-NA and NOAA NEAQS ITCT 2004 field campaigns. To ensure that the resulting data sets can be used interchangeably and merged into a unified database, we have performed a detailed comparison of the aerosol measurements recorded during wing-tip to wing-tip flight maneuvers carried out during these missions. Three such inter-comparison legs between NASA DC-8 and NOAA WP-3D were conducted during joint INTEX-NA and NEAQS ITCT2004 flight operations from Portsmouth, New Hampshire in late July and early August of 2004. These flight legs, around 45 minutes in length each, provided excellent opportunities to compare two particle size distribution measurements made using quite different approaches. The comparison of the size distributions for accumulation and fine particles modes are made separately. For each mode, we present time series of integrated number and volume density, selected number and volume size distributions, and correlations between the integrated quantities. The integrated quantities (i.e., number and volume density) are highly correlated. However, there are some significant differences in the regression slopes. These differences are also reflected in the size distributions. Preliminary analysis suggests a potential high bias in the WP-3D accumulation mode measurements related to humidity effects and calibration uncertainties.
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