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

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

We describe a two-channel broadband cavity enhanced absorption spectrometer (BBCEAS) for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH<sub>3</sub>COCHO), nitrous acid (HONO), nitrogen dioxide (NO<sub>2</sub>), and water (H<sub>2</sub>O). The instrum...

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Main Authors: K.-E. Min, R. A. Washenfelder, W. P. Dubé, A. O. Langford, P. M. Edwards, K. J. Zarzana, J. Stutz, K. Lu, F. Rohrer, Y. Zhang, S. S. Brown
Format: Article
Language:English
Published: Copernicus Publications 2016-02-01
Series:Atmospheric Measurement Techniques
Online Access:http://www.atmos-meas-tech.net/9/423/2016/amt-9-423-2016.pdf
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spelling doaj-9bba20289f924b0983f09d351f138be52020-11-25T01:01:36ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482016-02-019242344010.5194/amt-9-423-2016A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vaporK.-E. Min0R. A. Washenfelder1W. P. Dubé2A. O. Langford3P. M. Edwards4K. J. Zarzana5J. Stutz6K. Lu7F. Rohrer8Y. Zhang9S. S. Brown10Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USACooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USACooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USAChemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USACooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USACooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, USADepartment of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USACollege of Environmental Sciences and Engineering, Peking University, Beijing, ChinaInstitute of Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, Jülich, GermanyCollege of Environmental Sciences and Engineering, Peking University, Beijing, ChinaChemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO, USAWe describe a two-channel broadband cavity enhanced absorption spectrometer (BBCEAS) for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH<sub>3</sub>COCHO), nitrous acid (HONO), nitrogen dioxide (NO<sub>2</sub>), and water (H<sub>2</sub>O). The instrument spans 361&ndash;389 and 438&ndash;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<i>σ</i>) for retrievals of CHOCHO, HONO and NO<sub>2</sub> 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.http://www.atmos-meas-tech.net/9/423/2016/amt-9-423-2016.pdf
collection DOAJ
language English
format Article
sources DOAJ
author K.-E. Min
R. A. Washenfelder
W. P. Dubé
A. O. Langford
P. M. Edwards
K. J. Zarzana
J. Stutz
K. Lu
F. Rohrer
Y. Zhang
S. S. Brown
spellingShingle K.-E. Min
R. A. Washenfelder
W. P. Dubé
A. O. Langford
P. M. Edwards
K. J. Zarzana
J. Stutz
K. Lu
F. Rohrer
Y. Zhang
S. S. Brown
A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
Atmospheric Measurement Techniques
author_facet K.-E. Min
R. A. Washenfelder
W. P. Dubé
A. O. Langford
P. M. Edwards
K. J. Zarzana
J. Stutz
K. Lu
F. Rohrer
Y. Zhang
S. S. Brown
author_sort K.-E. Min
title A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
title_short A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
title_full A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
title_fullStr A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
title_full_unstemmed A broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
title_sort broadband cavity enhanced absorption spectrometer for aircraft measurements of glyoxal, methylglyoxal, nitrous acid, nitrogen dioxide, and water vapor
publisher Copernicus Publications
series Atmospheric Measurement Techniques
issn 1867-1381
1867-8548
publishDate 2016-02-01
description We describe a two-channel broadband cavity enhanced absorption spectrometer (BBCEAS) for aircraft measurements of glyoxal (CHOCHO), methylglyoxal (CH<sub>3</sub>COCHO), nitrous acid (HONO), nitrogen dioxide (NO<sub>2</sub>), and water (H<sub>2</sub>O). The instrument spans 361&ndash;389 and 438&ndash;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<i>σ</i>) for retrievals of CHOCHO, HONO and NO<sub>2</sub> 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.
url http://www.atmos-meas-tech.net/9/423/2016/amt-9-423-2016.pdf
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