A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor

Min, K.-E.; Washenfelder, R. A.; Dubé, W. P.; Langford, A. O.; Edwards, P. M.; Zarzana, K. J.; Stutz, J.; Lu, K.; Rohrer, F.; Zhang, Y.; Brown, S. S.

doi:10.5194/amt-9-423-2016

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A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor

2016
By Min, K.-E. ; Washenfelder, R. A. ; Dubé, W. P. ; ...
Source: Atmospheric Measurement Techniques, 9(2), 423-440.

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Journal Title:

Atmospheric Measurement Techniques
Personal Author:

Min, K.-E. ; Washenfelder, R. A. ; Dubé, W. P. ; Langford, A. O. ; Edwards, P. M. ; ... More +

Min, K.-E. ; Washenfelder, R. A. ; Dubé, W. P. ; Langford, A. O. ; Edwards, P. M. ; Zarzana, K. J. ; Stutz, J. ; Lu, K. ; Rohrer, F. ; Zhang, Y. ; Brown, S. S. Less -
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory)

OAR (Oceanic and Atmospheric Research) ; ESRL (Earth System Research Laboratory) ; CIRES (Cooperative Institute for Research in Environmental Sciences) ; CSL (Chemical Sciences Laboratory) Less -
Description:

We describe a two-channel broadband cavity enhanced absorption spectrometer (BBCEAS) for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH3COCHO), nitrous acid (HONO), nitrogen dioxide (NO2), and water (H2O). The instrument spans 361-389 and 438-468 nm, using two light-emitting diodes (LEDs) and a single grating spectrometer with a charge-coupled device (CCD) detector. Robust performance is achieved using a custom optical mounting system, high-power LEDs with electronic on/off modulation, high-reflectivity cavity mirrors, and materials that minimize analyte surface losses. We have successfully deployed this instrument during two aircraft and two ground-based field campaigns to date. The demonstrated precision (2 sigma) for retrievals of CHOCHO, HONO and NO2 are 34, 350, and 80 parts per trillion (pptv) in 5 s. The accuracy is 5.8, 9.0, and 5.0%, limited mainly by the available absorption cross sections.
Source:

Atmospheric Measurement Techniques, 9(2), 423-440.
DOI:

https://doi.org/10.5194/amt-9-423-2016
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Journal Article
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CC BY
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Submitted
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urn:sha256:a5c00215d66eb59d25a7dc428fab1f9b11eb9e8c1c2e9ec6470760c80e42819e
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A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor

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