Last edited by Faezshura
Wednesday, August 19, 2020 | History

2 edition of Survey of the role NOx in nonurban ozone formation found in the catalog.

Survey of the role NOx in nonurban ozone formation

J. R. Martinez

Survey of the role NOx in nonurban ozone formation

by J. R. Martinez

  • 106 Want to read
  • 7 Currently reading

Published by Office of Air Quality Planning and Standards, National Technical Information Service [distributor in Research Triangle Park, NC, Springfield, Va .
Written in

    Subjects:
  • Atmospheric nitrous oxide -- Environmental aspects -- United States.,
  • Ozone.

  • Edition Notes

    Statementby J.R. Martinez and H.B. Singh ; prepared for U.S. Environmental Protection Agency, Office of Air, Noise, and Radiation, Office of Air Quality Planning and Standards.
    ContributionsSingh, H. B., United States. Environmental Protection Agency. Office of Air Quality Planning and Standards., SRI International.
    The Physical Object
    Paginationxiii, 144 p. :
    Number of Pages144
    ID Numbers
    Open LibraryOL17653092M

    A field measurement campaign for ozone and ozone precursors (VOCs and NOx) was conducted in summer around a petroleum refinery in the Beijing rural region. Three observation sites were arranged, one at southwest of the refinery as the background, and two at northeast of the refinery as the downwind by: NOx cycle and the tropospheric ozone isotope anomaly: An experimental investigation Article (PDF Available) in Atmospheric Chemistry and Physics 13(4) April with Reads.

    ing ozone creation and destruction reactions, but substantial ozone formation in the troposphere requires both NOx and VOC precursors. Consequently, the response of ambient ozone concentrations to changes in NOx or VOC emissions depends on the relative concentrations of the two in the atmosphere as well as the intensity of insolation. The isopleth plot shows that ozone formation is a highly nonlinear process in relation to NO x and VOC. When NO x is low the rate of ozone formation increases with increasing NO x in a near-linear fashion. As NO x increases the rate of increase in ozone formation slows andeventuallyreaches alocal higherNO x.

      Nitrogen Oxides (NOx), net Ozone Depletion or Formation? «Reply #1 on: 04/02/ » "Ozone is a form of oxygen that consists of three chemically bonded oxygen atoms (O3) instead of the normal atmospheric oxygen, which consists of two oxygen atoms (O2). OZONE FORMED NOx + VOCS + Heat & Sunlight = Ozone Ground level or "bad" ozone is not emitted directly into the air, but is created by chemical reactions between oxides of nitrogen (NOx) and volatile organic compounds (VOCs) in the presence of heat and sunlight. Emissions from industrial facilities and electric utilities, motor vehicle exhaust.


Share this book
You might also like
Analysis of industrial fires

Analysis of industrial fires

James Casebere

James Casebere

Simplified Genealogy for Americans

Simplified Genealogy for Americans

Out of this world

Out of this world

Nature and meaning of sport in New Zealand

Nature and meaning of sport in New Zealand

history of the telescope

history of the telescope

Safety in construction work

Safety in construction work

Legal aspects of business administration.

Legal aspects of business administration.

Communion outside the Eucharist

Communion outside the Eucharist

CITIC PACIFIC LTD.

CITIC PACIFIC LTD.

Second Congress of the United States

Second Congress of the United States

Communication 101 Principles of Speech

Communication 101 Principles of Speech

Medieval texts and their first appearance in print.

Medieval texts and their first appearance in print.

Notes on the early coinage of Transoxiana.

Notes on the early coinage of Transoxiana.

Canteening under two flags

Canteening under two flags

Survey of the role NOx in nonurban ozone formation by J. R. Martinez Download PDF EPUB FB2

EPA/ Survey of the Role of NOX in Nonurban Ozone Formation by J.R. Martinez and H.B. Singh SRI International Ravenswood Avenue Menlo Park, California Contract No.

EPA Project Officer: Harold G. Richter Prepared for U.S. ENVIRONMENTAL PROTECTION AGENCY Office of Air, Noise, and Radiation Office of Air Quality Planning and Standards Research.

Get this from a library. Survey of the role NOx in nonurban ozone formation. [J R Martinez; H B Singh; United States. Environmental Protection Agency. Office.

A survey of information available on the role of NO(sup x) in nonurban O3 formation was prepared in (Martinez and Singh, ). This earlier survey was carried out to examine the hypothesis that NO(sup x) was the limiting precursor species with respect to photochemical formation of O3 over nonurban areas.

An earlier survey of information available on the role of NOX in nonurban 63 formation (Martinez and Singh, ) was conducted to examine the hypothesis that NOX was the limiting precursor species with respect to photochemical formation of 03 over nonurban areas.

The status of knowledge on photochemical ozone formation and the effects of nitrogen oxides and peroxyacyl nitrates on such formation has been evaluated. The literature is reviewed on nonurban ozone and nitrogen oxide concentration distributions, ozone lifetimes, nitrogen oxide lifetimes, and ozone formation in plumes as related to nitrogen oxide.

Nitrogen oxides are a primary air pollutant linked to photochemical smog, acid rain, tropospheric ozone, ozone layer depletion, and global warming (Prather and Sausen, ; Skalska et al., ).

When released in the atmosphere, NO x can react photochemically with organic compounds to generate O atoms, which combine with O 2 to form ozone.

To the extent that urban plumes are isolated aloft over- Role of nitrogen oxides in nonurban ozone formation night they might be expected to contribute not only fossil Os but some pan of the potential for next-day 03 by: Ozone, NOx and CO show diurnal variations typical to an urban site.

However, high levels of ozone, exceeding 80 ppbv, are rarely observed. The day time ozone production is basically due to the. efficiency of ozone formation in VOC- NO x-air mixtures. • At low ratios (ozone formation is slow and inefficient (i.e.,VOC-limited or VOC-sensitive chemistry).

Decreasing NO x levels may result in increased ozone formation. • At high ratios (> 15 to 20 ppbC/ppb), ozone formation is limited by the availability of NO. 3 Role of NO x in O 3 production • Too little NO x: O 3 loss (HO 2+O 3, OH+O 3) rather than radical cycling (e.g.

HO 2+NO) leading to net O 3 chemical destruction. P(O 3)x ≈a few troposphere) • Intermediate NO x: efficient O 3 production via cycling of HO x and NO x radicals. P(O 3)>L(O 3) (Global free troposphere), P(O 3)↑as NO x↑ • Too much NO x: Radical.

The Role of Nitrogen Oxides in Nonurban Ozone Formation in the Planetary Boundary Layer Over N. America, W. Europe and Adjacent Areas of Ocean, Atmos.

Environ., 20, Cited by: Ozone response to VOC emissions has a smaller spatial extent in the base model, but is important to ozone formation in the core area. Daytime ozone typically exhibits strongly concave response to NO x emissions, indicating far more nonlinear ozone formation Cited by: The most important pollutants that play a role in the formation of tropospheric ozone include nitrogen oxides (NO x) and volatile organic compounds (VOCs) as well as, to a lesser but still significant extent, methane and carbon monoxide.

The pace of photochemical reactions forming ozone in File Size: 1MB. With a wealth of technical information, the book discusses atmospheric chemistry, the role of oxides of nitrogen (NOx) and volatile organic compounds (VOCs) in ozone formation, monitoring and modeling the formation and transport processes, and the potential contribution of alternative fuels to solving the tropospheric ozone problem.

Suggested Citation:"6 VOCs and NOx: Relationship to Ozone and Associated Pollutants." National Research Council. Rethinking the Ozone Problem in Urban and Regional Air Pollution.

Washington, DC: The National Academies Press. doi: / In principle, isopleths can be generated directly. OZONE FORMATION AND CONTROL STRATEGIES. The high concentrations of O3 in surface air over the United States arise from high emissions of NOx and of various reactive hydrocarbons (including alkanes, alkenes, aromatics, and multifunctional compounds).

The emission of NOx is mainly from fossil fuel combustion (section ). A modeling study is described which investigates the relationship of emissions to cloudwater acidity downwind of isolated urban and power plant emissions sources. The parameterized model employed in the study combines a gas-phase, aerosol-particle and aqueous-phase chemical mechanism with scavenging, mass transfer and meteorology in a simple Cited by: 4.

The maximum ozone concentration that can be reached in a polluted atmosphere depends not only on the absolute concentrations of volatile organic compounds and nitrogen oxides (NOx) but also on their ratio (1).

At intermediate ratios ( to ), conditions are favourable for the formation of appreciable concentrations of ozone. NOx is the byproduct of water vapor blocking one path of ozone production. An oxygen atom is temporarily stored in an unstable state on a nitrogen molecule (N2O*).

Encountering a water molecule. Ozone and nitrogen oxides (NO x) are air pollutants with known associations to adverse health effects on studies have simultaneously measured ozone and nitrogen oxides with high spatial resolution. The main aim of this paper was to assess the levels and variation of ground-level ozone, NO 2 and NO x in two Swedish cities.

An additional aim was to describe the levels of these Cited by:. The flame ionization detector: Further comments on molecular breakdown and fundamental group response, J. Gas Chromatogr., 6, –Altshuller, A. P., The role of nitrogen oxides in nonurban ozone formation in the planetary boundary layer over N America, W Europe and adjacent areas of ocean, Atmos.

Environ., 20, –Ozone, NO x and VOC [Return to Table of Contents] Ozone formation Factors affecting O 3-NO x-VOC sensitivity Uncertainty in O 3-NO x-VOC sensitivity predictions. Ozone formation is driven by two major classes of directly emitted precursors: nitrogen oxides (NO x) and volatile organic compounds (VOC).The relation between O 3, NO x and VOC is driven by complex.The role of nitrogen oxides in nonurban ozone formation in the planetary boundary layer over n America, w europe and adjacent areas of ocean.

Atmospheric Environment ()20 (2), DOI: /(86) Armistead G. Russell, Glen R. by: