Ground-based tunable diode laser measurements of formaldehyde: improvements in system performance and recent field campaigns

Alan Fried; Scott David Sewell; Bruce E. Henry; Bryan P. Wert; James R. Drummond

doi:10.1117/12.255322

21 October 1996 Ground-based tunable diode laser measurements of formaldehyde: improvements in system performance and recent field campaigns

Alan Fried, Scott David Sewell, Bruce E. Henry, Bryan P. Wert, James R. Drummond

Author Affiliations +

Proceedings Volume 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring; (1996) https://doi.org/10.1117/12.255322
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

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.

Citation Download Citation

Alan Fried, Scott David Sewell, Bruce E. Henry, Bryan P. Wert, and James R. Drummond "Ground-based tunable diode laser measurements of formaldehyde: improvements in system performance and recent field campaigns", Proc. SPIE 2834, Application of Tunable Diode and Other Infrared Sources for Atmospheric Studies and Industrial Process Monitoring, (21 October 1996); https://doi.org/10.1117/12.255322

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