Simultaneous DOAS and mist-chamber IC measurements of HONO in Houston, TX

Stutz, J.; Oh, H.-J.; Whitlow, Sallie I.; Anderson, C. H.; Dibb, Jack E.; Flynn, James; Rappenglück, Bernhard; Lefer, B. L.

doi:10.1016/j.atmosenv.2009.02.003

Cited by 83 publications

(89 citation statements)

References 44 publications

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“…HONO (g) could also be released from the surface during the morning in response to chemical and physical changes occurring at the same time as the boundary layer breakup (e.g., evaporation of dew, release from soil pore water, and/or bacterial processes) [He et al, 2006;Maljanen et al, 2013;Oswald et al, 2013;Rubio et al, 2008;Su et al, 2011]. Overall, the agreement between these two instruments is comparable to other HONO (g) measurement intercomparisons between a new technique and an established sampling method Pinto et al, 2014;Ren et al, 2010;Stutz et al, 2010]. Therefore, the HONO (g) measurements made by the AIM-IC in Bakersfield during CalNex-SJV are considered reliable.…”

Section: Intercomparison Of Hono (G) Measurements Between Aim-ic and supporting

confidence: 57%

Evidence for a nitrous acid (HONO) reservoir at the ground surface in Bakersfield, CA, during CalNex 2010

et al. 2014

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Measurements of HONO (g) were validated to be free of known interferences for wet chemical instrumentation. The accumulation of nitrite into particulate matter was found to be enhanced when gaseous mixing ratios of HONO (g) were highest. Reactive uptake of HONO (g) on to lofted dust and the ground surface, forming a reservoir, is a potential mechanism to explain these observations. The AIM-IC HONO (g) measurements were parameterized in a chemical model to calculate the ground surface daytime HONO (g) source strength at 4.5 m above the surface, found to be on the order of 1.27 ppb h À1, to determine the relative importance of a surface reservoir. If all deposited nighttime HONO (g) is reemitted the following day, up to 30% of the daytime HONO (g) source at CalNex-SJV may be accounted for. The observations of HONO (g) and NO 2 À (p) in Bakersfield, during CalNex, suggest a surface sink and source of HONO (g) . Extension of currently accepted unknown daytime HONO (g) source reactions to include a potential surface HONO (g) reservoir should therefore be sound, but quantitation of the relative contributions of each surface source toward daytime HONO (g) production remains to be resolved.

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Section: Intercomparison Of Hono (G) Measurements Between Aim-ic and supporting

confidence: 57%

Evidence for a nitrous acid (HONO) reservoir at the ground surface in Bakersfield, CA, during CalNex 2010

et al. 2014

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“…Excellent agreement between LOPAP and LP-DOAS has been obtained (slope=0.987±0.015; r 2 =0.87) . The results of the comparison generally showed consistent agreement, although there were occasionally significant differences that could be attributed to either an NO 2 artefact of the DOAS instrument or possible interferences in the chemical methods (Heland et al 2001;Kleffmann et al 2006;Stutz et al 2010). CIMS is a powerful and sensitive technique in measuring many trace gases in the atmosphere.…”

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 70%

“…Time resolution, sensitivity, the absence of any artefact and the capability to perform measurements under diverse environmental conditions are paramount of importance in the performance of analytical instruments. Given that the increasing atmospheric interest in measuring HONO, intercomparison studies of instruments have been conducted in previous field measurements Stutz et al 2010;Levy et al 2014;Pinto et al 2014). Excellent agreement between LOPAP and LP-DOAS has been obtained (slope=0.987±0.015; r 2 =0.87) .…”

Section: Responsible Editor: Gerhard Lammelmentioning

confidence: 96%

“…Thus, the DOAS instrument was less sensitive to any abrupt changes in the measured HONO concentrations compared to in situ instruments, which might explain overall lower readings from the DOAS instrument. Furthermore, the observed difference could be combined with negative interferences in DOAS retrievals, in addition to different air masses sampled Stutz et al 2010).…”

Section: Lopap/doasmentioning

confidence: 99%

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Measurements of nitrous acid (HONO) in urban area of Shanghai, China

Bernard

Cazaunau

Grosselin

et al. 2015

Environ Sci Pollut Res

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Nitrous acid (HONO), as a precursor of the hydroxyl radical (OH), plays an important role in the photochemistry of the troposphere, especially in the polluted urban atmosphere. A field campaign was conducted to measure atmospheric HONO concentration and that of other pollutants (such as NO 2 and particle mass concentration) in the autumn of 2009 at Shanghai urban areas. HONO mixing ratios were simultaneously measured by three different techniques: long path absorption photometer (LOPAP), differential optical absorption spectroscopy (DOAS) and chemical ionization mass spectrometer (CIMS). The measurements showed that the mixing ratios of HONO were highly variable and depended strongly on meteorological parameters. The HONO levels ranged from 0.5 to 7 ppb with maximum values during early morning and minimum levels during late afternoon. The three instruments reproduced consistent diurnal pattern of HONO concentrations with higher concentration during the night compared to the daylight hours. Comparison of HONO LOPAP /HONO CIMS ratios during daytime and nighttime periods exhibited a non-systematic disagreement of 0.93 and 1.16, respectively. This would indicate different chemical compositions of sampled air for the LOPAP and the CIMS instruments during daytime and nighttime periods, which have possibly affected measurements. Mean HONO concentration reported by LOPAP was 33 % higher than by DOAS on the whole period with no significant difference between daytime and nighttime periods. This revealed a systematic deviation from both instruments. The present data provides complementary information of HONO ambient levels in the atmosphere of Shanghai urban areas.

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“…Existing detection methods can be categorized as wet chemistry, mass spectrometry, and optical spectroscopy. The wet chemical detection methods are sensitive but generally rely on conversion of HONO to nitrite ion (NO − 2 ) (Appel et al, 1990;Dibb et al, 2002;Kleffmann et al, 2006) and may be susceptible to chemical interferences and sampling artifacts (Stutz et al, 2010). Recently, chemical ionization mass spectrometry with acetate ion (Roberts et al, 2010) or iodide ion chemistry has been successfully used for sensitive HONO detection.…”

mentioning

confidence: 99%

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

et al. 2016

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

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Simultaneous DOAS and mist-chamber IC measurements of HONO in Houston, TX

Cited by 83 publications

References 44 publications

Evidence for a nitrous acid (HONO) reservoir at the ground surface in Bakersfield, CA, during CalNex 2010

Evidence for a nitrous acid (HONO) reservoir at the ground surface in Bakersfield, CA, during CalNex 2010

Measurements of nitrous acid (HONO) in urban area of Shanghai, China

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

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