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Airborne Cavity Ring-Down Measurement of Aerosol Extinction and Scattering During the Aerosol IOPLarge uncertainties in the effects of aerosols on climate require improved in-situ measurements of extinction coefficient and single-scattering albedo. This paper describes preliminary results from Cadenza, a new continuous wave cavity ring-down (CW-CRD) instrument designed to address these uncertainties. Cadenza measures the aerosol extinction coefficient for 675 nm and 1550 nm light, and simultaneously measures the scattering coefficient at 675 nm. In the past year Cadenza was deployed in the Asian Dust Above Monterey (ADAM) and DOE Aerosol Intensive Operating Period (IOP) field projects. During these flights Cadenza produced measurements of aerosol extinction in the range from 0.2 to 300 Mm-1 with an estimated precision of 0.1 Min-1 for 1550 nm light and 0.2 Mm-1 for 675 nm light. Cadenza data from the ADAM and Aerosol IOP missions compared favorably with data from the other instruments aboard the CIRPAS Twin Otter aircraft and participating in those projects.= We present comparisons between the Cadenza measurements and those friom a TSI nephelometer, Particle Soot Absorption Photometer (PSAP), and the AATS 14 sun-photometer. Measurements of the optical properties of smoke and dust plumes sampled during these campaigns are presented and estimates of heating rates due to these plumes are made.
Document ID
20040045267
Acquisition Source
Headquarters
Document Type
Preprint (Draft being sent to journal)
Authors
Strawa, A. W.
(NASA Ames Research Center Moffett Field, CA, United States)
Ricci, K.
(NASA Ames Research Center Moffett Field, CA, United States)
Provencal, R.
(NASA Ames Research Center Moffett Field, CA, United States)
Schmid, B.
(NASA Ames Research Center Moffett Field, CA, United States)
Covert, D.
(NASA Ames Research Center Moffett Field, CA, United States)
Elleman, R.
(NASA Ames Research Center Moffett Field, CA, United States)
Arnott, P.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2003
Subject Category
Meteorology And Climatology
Meeting Information
Meeting: DOE Aerosol Working Group
Location: Sonoma, CA
Country: United States
Start Date: December 15, 2003
End Date: December 17, 2003
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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