Tunable-diode-laser absorption measurements of H2O2 and HCHO during the Mauna Loa observatory photochemistry experiment.

Gervase I. Mackay; David R. Karecki; Harold I. Schiff

doi:10.1117/12.140178

12 February 1993 Tunable-diode-laser absorption measurements of H₂O₂ and HCHO during the Mauna Loa observatory photochemistry experiment.

Gervase I. Mackay, David R. Karecki, Harold I. Schiff

Author Affiliations +

Proceedings Volume 1715, Optical Methods in Atmospheric Chemistry; (1993) https://doi.org/10.1117/12.140178
Event: Environmental Sensing '92, 1992, Berlin, Germany

Abstract

The tunable diode laser absorption spectrometric technique was employed to measure H₂O₂ and HCHO during the Mauna Loa Observatory Photochemistry Experiment II fall and winter intensives. Comparisons were made between the measurements made with the TDLAS technique and several other methods. The half-hourly average mixing ratios varies between 1300 pptv and the instrument detection limit of 50 - 100 pptv for H₂O₂ and between 400 pptv and the instrument detection limit approximately 25 pptv for HCHO. Daily average mixing ratios for H₂O₂ were 550 +/- 79 pptv (fall) and 540 +/- 80 pptv (winter), and for HCHO were 130 +/- 21 pptv (fall) and 200 +/- 35 (winter). HCHO showed strong diurnal behavior with maxima in the 12:00 - 17:00 time period whereas H₂O₂ showed essentially no diurnal variation. Clean tropospheric air sampled during downslope conditions between 20:00 and 06:00 had HCHO mixing ratios averaging 80 pptv in the fall and 160 pptv in the winter. These values are considerably lower than model predictions.

Citation Download Citation

Gervase I. Mackay, David R. Karecki, and Harold I. Schiff "Tunable-diode-laser absorption measurements of H₂O₂ and HCHO during the Mauna Loa observatory photochemistry experiment.", Proc. SPIE 1715, Optical Methods in Atmospheric Chemistry, (12 February 1993); https://doi.org/10.1117/12.140178

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available