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dc.contributor.authorStrawa, A. W.
dc.contributor.authorElleman, R.
dc.contributor.authorHallar, A. G.
dc.contributor.authorCovert, D.
dc.contributor.authorRicci, K.
dc.contributor.authorProvencal, R.
dc.contributor.authorOwano, T. W.
dc.contributor.authorJonsson, H.H.
dc.contributor.authorSchmid, B.
dc.contributor.authorLuu, A. P.
dc.contributor.authorBokarius, K.
dc.contributor.authorAndrews, E.
dc.date2006
dc.date.accessioned2014-06-11T23:18:34Z
dc.date.available2014-06-11T23:18:34Z
dc.date.issued2006
dc.identifier.urihttp://hdl.handle.net/10945/42227
dc.descriptionJournal of Geophysical Research, Vol. 111, No. D5, D05S03en_US
dc.descriptionThe article of record as published may be located at http://dx.doi.org/10.1029/2005JD006056.en_US
dc.description.abstractIn May 2003, the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Program sponsored the Aerosol Intensive Operating Period (AIOP) which was conducted over the ARM Climate Research Facility (ACRF) in central Oklahoma. One new instrument that flew in the AIOP, called Cadenza, employed a cavity ring-down technique to measure extinction coefficient and a reciprocal nephelometer technique to simultaneously measure scattering coefficient. This instrument is described in this paper, and measurements are compared to those of conventional instrumentation. Agreement between Cadenza extinction coefficient and that derived from combining nephelometer scattering and PSAP absorption (Neph + PSAP) was excellent, about 2%. Agreement between Cadenza scattering coefficient and TSI nephelometer scattering was also excellent, about 2%, well within the uncertainty of the nephelometer and Cadenza scattering measurements. Comparisons between these instruments, made for the special case of plumes, showed that Cadenza measured extinction and scattering several percent higher on average than the Neph + PSAP and nephelometer alone. This difference is likely due to differences in the instrument response time: The response time for Cadenza is 1 s while that for the nephelometer is a minimum of 8 s. Plumes, identified as originating from Siberian biomass burning, are characterized. Composite size distributions from wing-mounted probes showed that two of the plumes had significant large particle modes that resulted in high values of the effective radius. The effect of the large particle mode was not seen in the A ° ngstro¨m coefficient calculated from the in-cabin scattering measurements because of the characteristics of the aircraft inlet.en_US
dc.rightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. As such, it is in the public domain, and under the provisions of Title 17, United States Code, Section 105, may not be copyrighted.en_US
dc.titleComparison of in situ aerosol extinction and scattering coefficient measurements made during the Aerosol Intensive Operating Perioden_US
dc.contributor.departmentCenter for Interdisciplinary Remotely Piloted Aircraft Studies (CIRPAS)


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