Performance of a Focused Cavity Aerosol Spectrometer for Measurements in the Stratosphere of Particle Size in the 0.06–2.0-µm-Diameter Range

H.H. Jonsson * Department of Engineering, University of Denver, Denver, Colorado

Search for other papers by H.H. Jonsson in
Current site
Google Scholar
PubMed
Close
,
J.C. Wilson * Department of Engineering, University of Denver, Denver, Colorado

Search for other papers by J.C. Wilson in
Current site
Google Scholar
PubMed
Close
,
C.A. Brock * Department of Engineering, University of Denver, Denver, Colorado

Search for other papers by C.A. Brock in
Current site
Google Scholar
PubMed
Close
,
R.G. Knollenberg Particle Measuring Systems, Inc., Boulder, Colorado

Search for other papers by R.G. Knollenberg in
Current site
Google Scholar
PubMed
Close
,
T.R. Newton Particle Measuring Systems, Inc., Boulder, Colorado

Search for other papers by T.R. Newton in
Current site
Google Scholar
PubMed
Close
,
J.E. Dye National Center for Atmospheric Research, Boulder, Colorado

Search for other papers by J.E. Dye in
Current site
Google Scholar
PubMed
Close
,
D. Baumgardner National Center for Atmospheric Research, Boulder, Colorado

Search for other papers by D. Baumgardner in
Current site
Google Scholar
PubMed
Close
,
S. Borrmann University of Mainz, Mainz, Germany

Search for other papers by S. Borrmann in
Current site
Google Scholar
PubMed
Close
,
G.V. Ferry NASA Ames Research Center, Moffett Field, California

Search for other papers by G.V. Ferry in
Current site
Google Scholar
PubMed
Close
,
R. Pueschel NASA Ames Research Center, Moffett Field, California

Search for other papers by R. Pueschel in
Current site
Google Scholar
PubMed
Close
,
Dave C. Woods ** NASA Langley Research Center, Hampton, Virginia

Search for other papers by Dave C. Woods in
Current site
Google Scholar
PubMed
Close
, and
Mike C. Pitts Science Applications International Corporation, Hampton, Virginia

Search for other papers by Mike C. Pitts in
Current site
Google Scholar
PubMed
Close
Restricted access

Abstract

A focused cavity aerosol spectrometer aboard a NASA ER-2 high-altitude aircraft provided high-resolution measurements of the size of the stratospheric particles in the 0.06–2.0-µm-diameter range in flights following the eruption of Mount Pinatubo in 1991. Effects of anisokinetic sampling and evaporation in the sampling system were accounted for by means adapted and specifically developed for this instrument. Calibrations with monodisperse aerosol particles provided the instrument's response matrix, which upon inversion during data reduction yielded the particle size distributions. The resultant dataset is internally consistent and generally shows agreement to within a factor of 2 with comparable measurements simultaneously obtained by a condensation nuclei counter, a forward-scattering spectrometer probe, and aerosol particle impactors, as well as with nearby extinction profiles obtained by satellite measurements and with lidar measurements of backscatter.

Abstract

A focused cavity aerosol spectrometer aboard a NASA ER-2 high-altitude aircraft provided high-resolution measurements of the size of the stratospheric particles in the 0.06–2.0-µm-diameter range in flights following the eruption of Mount Pinatubo in 1991. Effects of anisokinetic sampling and evaporation in the sampling system were accounted for by means adapted and specifically developed for this instrument. Calibrations with monodisperse aerosol particles provided the instrument's response matrix, which upon inversion during data reduction yielded the particle size distributions. The resultant dataset is internally consistent and generally shows agreement to within a factor of 2 with comparable measurements simultaneously obtained by a condensation nuclei counter, a forward-scattering spectrometer probe, and aerosol particle impactors, as well as with nearby extinction profiles obtained by satellite measurements and with lidar measurements of backscatter.

Save