NTRS - NASA Technical Reports Server

Back to Results
In Situ Measurement of Aerosol ExtinctionAerosols are important contributors to the radiative forcing in the atmosphere. Much of the uncertainty in our knowledge of climate forcing is due to uncertainties in the radiative forcing due to aerosols as illustrated in the IPCC reports of the last ten years. Improved measurement of aerosol optical properties, therefore, is critical to an improved understanding of atmospheric radiative forcing. Additionally, attempts to reconcile in situ and remote measurements of aerosol radiative properties have generally not been successful. This is due in part to the fact that it has been impossible to measure aerosol extinction in situ in the past. In this presentation we introduce a new instrument that employs the techniques used in cavity ringdown spectroscopy to measure the aerosol extinction and scattering coefficients in situ. A prototype instrument has been designed and tested in the lab and the field. It is capable of measuring aerosol extinction coefficient to 2x10(exp -6) per meter. This prototype instrument is described and results are presented.
Document ID
Document Type
Conference Paper
Strawa, Anthony W.
(NASA Ames Research Center Moffett Field, CA United States)
Castaneda, R.
(NASA Ames Research Center Moffett Field, CA United States)
Owano, T. G.
(Informed Diagnostics, Inc. CA United States)
Bear, D.
(Informed Diagnostics, Inc. CA United States)
Gore, Warren J.
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Environment Pollution
Distribution Limits
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available