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Record Details

Record 18 of 853
Cavity Ring-Down Measurement of Aerosol Optical Properties During the Asian Dust Above Monterey Experiment and DOE Aerosol Intensive Operating Period
Author and Affiliation:
Ricci, K.(NASA Ames Research Center, Moffett Field, CA, United States)
Strawa, A. W.(NASA Ames Research Center, Moffett Field, CA, United States)
Provencal, R.(NASA Ames Research Center, Moffett Field, CA, United States)
Castaneda, R.(NASA Ames Research Center, Moffett Field, CA, United States)
Bucholtz, A.(NASA Ames Research Center, Moffett Field, CA, United States)
Schmid, B.(NASA Ames Research Center, Moffett Field, CA, United States)
Abstract: Large 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 with an estimated precision of 0.1/Mm for 1550 nm light and 0.2/Mm 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 from 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.
Publication Date: Jan 01, 2004
Document ID:
20040043720
(Acquired Apr 07, 2004)
Subject Category: METEOROLOGY AND CLIMATOLOGY
Document Type: Preprint
Meeting Information: American Geophysical Union (AGU) Fall 2003; 2003; Unknown; Unknown
Meeting Sponsor: American Geophysical Union; Washington, DC, United States
Financial Sponsor: NASA Ames Research Center; Moffett Field, CA, United States
Organization Source: NASA Ames Research Center; Moffett Field, CA, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ABSORPTION SPECTROSCOPY; AEROSOLS; CAVITIES; DUST; IN SITU MEASUREMENT; OPTICAL MEASUREMENT; OPTICAL PROPERTIES; ALBEDO; CLIMATE; CONTINUOUS RADIATION; ESTIMATING; SCATTERING COEFFICIENTS; SMOKE; SOOT
Availability Source: Other Sources
Availability Notes: Abstract Only
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