TWP-ICE CRM INTERCOMPARISON
Dry aerosol number size distribution profile:
Comments:
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Idealized size distribution profiles based on Dornier and Egrett measurements provided by Martin Gallagher
(FSSP instrument, 0.5-um cut; CPC measurement, 10-nm cut) and Paul Williams
(CPC1 measurement, 10-nm cut; CPC2 measurement, 40-nm cut), collected on flights from 20-27 January 2006.
FSSP concentrations at ambient RH converted to approximate dry size
by assuming drop growth factors for pure ammonium sulfate (data limited to
ambient RH between 75 and 95 percent).
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Size distribution parameters for three lognormal modes adopted from
Table 7 of Allen et al. (Aerosol and trace gas measurements in the
Darwin area during the wet season, JGR 113:D06306, 2008) for active
monsoon conditions, except that the fine mode standard deviation is
limited to 0.11 in order to provide a physical solution at all altitudes shown.
A number concentration in each mode and altitude range then derived from measurements
of particles in three size cuts: larger than 0.01, 0.04, and 0.5 dry diameter.
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Any use of data in publications requires PI consent. Any errors in analysis shown here should be blamed on Ann Fridlind.
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Download text file.
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Mean profiles used to derive number concentrations in each mode:
