Results of the Gas‐Phase Sulfur Intercomparison Experiment (GASIE): Overview of experimental setup, results and general conclusions

Stecher, Hilmar A.; Luther, George W.; MacTaggart, Douglas L.; Farwell, S. O.; Crosley, David R.; Dorko, William D.; Goldan, P. D.; Beltz, N.; Krischke, Udo; Luke, Winston T.; Thornton, D. C.; Talbot, R. W.; Lefer, B. L.; Scheuer, Eric; Benner, Richard L.; Wu, Jainguo; Saltzman, E. S.; Gallagher, Michael; Ferek, Ronald J.

doi:10.1029/97jd01362

Cited by 28 publications

(12 citation statements)

References 10 publications

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“…A modified, commercial, UV pulsed-fluorescence instrument (Thermo Environmental Instruments Inc. (TEI), Model 43S) was used to measure SO2. In a recent intercomparison the Model 43S instrument has been shown [Luke, 1997] to provide linear measurements of SO2 to levels below 0.1 ppbv for long integration periods, and to agree within 13% with other SO2 measurement techniques [Stecher et al, 1997].…”

Section: Sulfur Dioxidementioning

confidence: 95%

Emissions lifetimes and ozone formation in power plant plumes

Ryerson¹,

Buhr²,

Frost³

et al. 1998

J. Geophys. Res.

205

217

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Abstract. The concept of ozone production efficiency (OPE) per unit NOx is based on photochemical models and provides a tool with which to assess potential regional tropospheric ozone control strategies involving NOx emissions reductions. An aircraft study provided data from which power plant emissions removal rates and measurement-based estimates of OPE are estimated. This study was performed as part of the Southern Oxidants Study-1995 Nashville intensive and focuses on the evolution of NOx, SO2, and ozone concentrations in power plant plumes during transport. Two approaches are examined. A mass balance approach accounts for mixing effects within the boundary layer and is used to calculate effective boundary layer removal rates for NOx and SO2 and to estimate net OPE. Net OPE is more directly comparable to photochemical model results than previous measurement-based estimates. Derived net production efficiencies from mass balance range from 1 to 3 molecules of ozone produced per molecule of NOx emitted. A concentration ratio approach provides an estimate of removal rates of primary emissions relative to a tracer species. This approach can be combined with emissions ratio information to provide upper limit estimates of OPE that range from 2 to 7. Both approaches illustrate the dependence of ozone production on NOx source strength in these large point source plumes. The dependence of total ozone production, ozone production efficiency, and the rate of ozone production on NOx source strength is examined. These results are interpreted in light of potential ozone control strategies for the region.

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Section: Sulfur Dioxidementioning

confidence: 95%

Emissions lifetimes and ozone formation in power plant plumes

Ryerson¹,

Buhr²,

Frost³

et al. 1998

J. Geophys. Res.

205

217

View full text Add to dashboard Cite

show abstract

“…The dissolved ions in the stripping solution were quantified by ion chromatography. The mist chamber/ion chromatography (MCflC) method has been continually developed and improved over the past 10 years and has proven in various intercomparison studies to be very effective at sampling gaseous HNO3, HCOOH, CH3COOH, and SO2 [Keene et al, 1989;Talbot et al, 1990;Stecher et al, 1997].…”

Section: Gas Sampling Methods and Protocolsmentioning

confidence: 99%

Nitric acid and ammonia at a rural northeastern U.S. site

Lefer¹,

Talbot²,

Munger³

1999

J. Geophys. Res.

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“…The field site is situated about 800 m south of the Delaware Bay, 3 km west of the Atlantic Ocean, and is adjacent (<50 m) to a large salt marsh on the west. This site is the location of a previous campaign to study gas-phase sulfur (S) emissions and to perform a sulfur dioxide intercomparison experiment Stecher et al 1997). The site is occasionally impacted by sulfur dioxide emissions from a coal-fired power plant 23 km to the south-southwest.…”

Section: Methodsmentioning

confidence: 99%

Nanoparticle Chemical Composition During New Particle Formation

Bzdek

Zordan

Luther

et al. 2011

Aerosol Science and Technology

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The nano aerosol mass spectrometer (NAMS) was deployed at a coastal site in Lewes, Delaware, to measure the composition of 21 nm mass normalized (18 nm mobility) diameter nanoparticles during new particle formation (NPF) events. NAMS provides a quantitative measure of the atomic composition of individual nanoparticles. NAMS analysis of ambient particles showed only a small change in particle composition during NPF events in Lewes compared with off-event (before and/or after the event). The N mole fraction increased 15% on-event, whereas the C mole fraction decreased 25%, suggesting an enhanced inorganic component to the aerosol during NPF. The measured changes in atomic composition constrain the possible changes in molecular composition. To explore these constraints, an apportionment algorithm was applied to the atomic composition data. This algorithm partitions the atomic composition into sulfate, nitrate, and ammonium on the basis of the atomic abundance of S, N, and O and into organic matter on the basis of C and residual O after removing contributions to inorganic species. Particles were fully neutralized both on-and off-event. The nitrate to sulfate ratio during NPF ranged from 0.7 to 1.4, suggesting that ammonium nitrate is important to particle growth in this environment. Nonetheless, nanoparticles had a significant organic fraction, and upper limits for cationic amine content were determined. The relatively small changes in total particle composition on-event versus off-event suggest that observed changes in particle hygroscopicity and volatility during NPF at other locations may be linked to subtle changes in particle composition or to shifts in the character of the organic content.Received 11 February 2011; accepted 6 April 2011. The authors acknowledge Katherine M. Mullaugh for assistance during the field campaign, Elizabeth Frey of the Delaware Department of Natural Resources and Environmental Control (DNREC), and the NOAA Air Resources Laboratory (ARL) for the provision of the HYSPLIT transport and dispersion model and READY website (http://www.arl.noaa.gov/ready.php) used in this publication. Bryan R.

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Results of the Gas‐Phase Sulfur Intercomparison Experiment (GASIE): Overview of experimental setup, results and general conclusions

Cited by 28 publications

References 10 publications

Emissions lifetimes and ozone formation in power plant plumes

Emissions lifetimes and ozone formation in power plant plumes

Nitric acid and ammonia at a rural northeastern U.S. site

Nanoparticle Chemical Composition During New Particle Formation

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