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Proceedings Paper

Ground-based tunable diode laser measurements of formaldehyde: improvements in system performance and recent field campaigns
Author(s): Alan Fried; Scott David Sewell; Bruce E. Henry; Bryan P. Wert; James R. Drummond
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Paper Abstract

Formaldehyde (HCHO) is an important reactive intermediate in atmospheric studies. Accurate measurements of HCHO are required to constrain and validate photochemical models. Despite this importance, there is still considerable uncertainty in present ambient measurements of this gas as well as in measurement-model relationships. The present paper discusses the long-term effort at NCAR to develop, employ, and validate a highly sensitive tunable diode laser absorption spectrometer (TDLAS) for ambient measurements of HCHO. A detailed analysis of measurement precision will be presented and performance improvements using rapid background subtraction, FFT filtering, and scan-by-scan demeaning will be discussed. This paper will conclude with a brief discussion of recent photochemistry and intercomparison field campaigns employing the TDLAS.

Paper Details

Date Published: 21 October 1996
PDF: 15 pages
Proc. SPIE 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring, (21 October 1996); doi: 10.1117/12.255322
Show Author Affiliations
Alan Fried, National Ctr. for Atmospheric Research (United States)
Scott David Sewell, National Ctr. for Atmospheric Research (United States)
Bruce E. Henry, National Ctr. for Atmospheric Research (United States)
Bryan P. Wert, National Ctr. for Atmospheric Research and Univ. of Colorado/Boulder (United States)
James R. Drummond, Univ. of Toronto (Canada)


Published in SPIE Proceedings Vol. 2834:
Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring
Alan Fried, Editor(s)

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