Analysis of Ozone and Nitric Oxide by a Chemiluminescent Method in Laboratory and Atmospheric Studies of Photochemical Smog

Stedman, Donald H.; Daby, E. E.; Stuhl, F.; Niki, H.

doi:10.1080/00022470.1972.10469635

Cited by 73 publications

(34 citation statements)

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“…By using a 'reversed' mode and supplying the instrument with pure nitric oxide, an extremely sensitive ozone detector was achieved (Stedman et al, 1972). Minimal gas sampling plumbing and faster electronics were used to increase the frequency response of ozone detection and to take advantage of this sensitivity.…”

Section: Instrumentationmentioning

confidence: 99%

Airborne measurements of the vertical flux of ozone in the boundary layer

Lenschow

Delany

Stankov

et al. 1980

Boundary-Layer Meteorol

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A fast-response chemiluminescent ozone sensor was mounted in an aircraft instrumented for air motion and temperature measurements. Measurements of the vertical flux of ozone by the eddy correlation technique were obtained after correcting for time delay and pressure sensitivity in the ozone sensor output. The observations were taken over eastern Colorado for two days in April, one a morning and the other an afternoon flight. Since the correlation coefficient of ozone and vertical velocity is small compared to, for example, temperature and vertical velocity in the lower part of the convective boundary layer, an averaging length of the order of 100 km was required to obtain a reasonably accurate estimate of the ozone flux. The measured variance of ozone appeared to be too large, probably mainly due to random noise in the sensor output, although the possibility of the production of ozone fluctuations by chemical reactions cannot be dismissed entirely. Terms in the budget equation for ozone were estimated from the aircraft measurements and the divergence of the ozone flux was found to be large compared to the flux at the surface divided by the boundary-layer height.

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Section: Instrumentationmentioning

confidence: 99%

Airborne measurements of the vertical flux of ozone in the boundary layer

Lenschow

Delany

Stankov

et al. 1980

Boundary-Layer Meteorol

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“…It was shown that both methods reveal the presence of oxidants in the atmosphere but only tend to be related quantitatively. These results provide additional data on the problem documented in New York City, 12 but without suggesting any easy solution.…”

Section: Discussionmentioning

confidence: 80%

Simultaneous Total Oxidant and Chemiluminescent Ozone Measurements in Ambient Air

Severs

1975

Journal of the Air Pollution Control Association

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“…For eddy correlation, [NO] was measured with a fast-response chemiluminescent analyzer, built at Argonne and described by Drapcho et al (1983), and the signal was recorded at a rate of 20 s -I. This sensor uses the basic concept and operation described by Stedman et al (1972), Ritter et al (1979, MacFarland (1980), andKley et al (1981). The noise level of the instrument was approximately 40 pptv of NO when [NO] was very small, near 0.1 ppbv.…”

Section: Experimental Methodsmentioning

confidence: 99%

Observations of nitric oxide fluxes over grass

et al. 1989

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Eddy correlation measurements of NO vertical flux were made periodically from October 1983 through June 1984 at a height of eight meters above grass in northeastern Illinois, U.S.A. From 207 data points, each representing a 25 rain average, 19 daytime cases and 8 nighttime cases were selected on the basis of steady, nonadvective atmospheric conditions. Each case was represented by a set of data constituting a 3 to 5 hr average. Concentrations of 03, NO, and NOv (from which NO 2 was inferred) and local atmospheric and surface conditions also were measured, to provide the information necessary to assess the relative importance of surface deposition, surface emission, and air chemistry on the observed NO flux. On the basis of a linear regression analysis applied with independent variables representing physical, chemical, and biological processes, surface uptake of NO was very small for data primarily collected in the daytime during spring, and measured deposition velocities at a height of 8 m were very small, much smaller than expected for NO2. For the same time period, the surface emission rates of elemental nitrogen in NO were in the range of 1.4 to 4.2 ng m --~ s -I for moist, unsaturated soils at temperatures near 15 °C. These emissions were partially masked in the measured fluxes by rapid in-air chemical reactions involving O_~ and NO2. The effects of rapid in-air chemical reactions involving 03 were to decrease the (upward) flux of NO with height. While the information collected at night was too limited to strongly support hypotheses concerning emissions and deposition, a pathway for NO production by reactions involving NO3 and related compounds was indicated. For daytime conditions, this production pathway is not evident, probably because of the relatively strong effects of photochemical reactions involving NO, NO_,, and 03.

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Analysis of Ozone and Nitric Oxide by a Chemiluminescent Method in Laboratory and Atmospheric Studies of Photochemical Smog

Cited by 73 publications

References 0 publications

Airborne measurements of the vertical flux of ozone in the boundary layer

Airborne measurements of the vertical flux of ozone in the boundary layer

Simultaneous Total Oxidant and Chemiluminescent Ozone Measurements in Ambient Air

Observations of nitric oxide fluxes over grass

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