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Bahreini R, Middlebrook AM, Brock CA, de Gouw JA, McKeen SA, Williams LR, Daumit KE, Lambe AT, Massoli P, Canagaratna MR, Ahmadov R, Carrasquillo AJ, Cross ES, Ervens B, Holloway JS, Hunter JF, Onasch TB, Pollack IB, Roberts JM, Ryerson TB, Warneke C, Davidovits P, Worsnop DR, Kroll JH. Mass spectral analysis of organic aerosol formed downwind of the Deepwater Horizon oil spill: field studies and laboratory confirmations. Environ Sci Technol 2012; 46:8025-8034. [PMID: 22788666 DOI: 10.1021/es301691k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In June 2010, the NOAA WP-3D aircraft conducted two survey flights around the Deepwater Horizon (DWH) oil spill. The Gulf oil spill resulted in an isolated source of secondary organic aerosol (SOA) precursors in a relatively clean environment. Measurements of aerosol composition and volatile organic species (VOCs) indicated formation of SOA from intermediate-volatility organic compounds (IVOCs) downwind of the oil spill (Science2011, 331, doi 10.1126/science.1200320). In an effort to better understand formation of SOA in this environment, we present mass spectral characteristics of SOA in the Gulf and of SOA formed in the laboratory from evaporated light crude oil. Compared to urban primary organic aerosol, high-mass-resolution analysis of the background-subtracted SOA spectra in the Gulf (for short, "Gulf SOA") showed higher contribution of C(x)H(y)O(+) relative to C(x)H(y)(+) fragments at the same nominal mass. In each transect downwind of the DWH spill site, a gradient in the degree of oxidation of the Gulf SOA was observed: more oxidized SOA (oxygen/carbon = O/C ∼0.4) was observed in the area impacted by fresher oil; less oxidized SOA (O/C ∼0.3), with contribution from fragments with a hydrocarbon backbone, was found in a broader region of more-aged surface oil. Furthermore, in the plumes originating from the more-aged oil, contribution of oxygenated fragments to SOA decreased with downwind distance. Despite differences between experimental conditions in the laboratory and the ambient environment, mass spectra of SOA formed from gas-phase oxidation of crude oil by OH radicals in a smog chamber and a flow tube reactor strongly resembled the mass spectra of Gulf SOA (r(2) > 0.94). Processes that led to the observed Gulf SOA characteristics are also likely to occur in polluted regions where VOCs and IVOCs are coemitted.
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Affiliation(s)
- R Bahreini
- Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder, Boulder, Colorado, USA.
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Ahmadov R, McKeen SA, Robinson AL, Bahreini R, Middlebrook AM, de Gouw JA, Meagher J, Hsie EY, Edgerton E, Shaw S, Trainer M. A volatility basis set model for summertime secondary organic aerosols over the eastern United States in 2006. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jd016831] [Citation(s) in RCA: 154] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Brioude J, Petron G, Frost GJ, Ahmadov R, Angevine WM, Hsie EY, Kim SW, Lee SH, McKeen SA, Trainer M, Fehsenfeld FC, Holloway JS, Peischl J, Ryerson TB, Gurney KR. A new inversion method to calculate emission inventories without a prior at mesoscale: Application to the anthropogenic CO2emission from Houston, Texas. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jd016918] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Brioude J, Kim SW, Angevine WM, Frost GJ, Lee SH, McKeen SA, Trainer M, Fehsenfeld FC, Holloway JS, Ryerson TB, Williams EJ, Petron G, Fast JD. Top-down estimate of anthropogenic emission inventories and their interannual variability in Houston using a mesoscale inverse modeling technique. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2011jd016215] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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de Gouw JA, Middlebrook AM, Warneke C, Ahmadov R, Atlas EL, Bahreini R, Blake DR, Brock CA, Brioude J, Fahey DW, Fehsenfeld FC, Holloway JS, Le Henaff M, Lueb RA, McKeen SA, Meagher JF, Murphy DM, Paris C, Parrish DD, Perring AE, Pollack IB, Ravishankara AR, Robinson AL, Ryerson TB, Schwarz JP, Spackman JR, Srinivasan A, Watts LA. Organic aerosol formation downwind from the Deepwater Horizon oil spill. Science 2011; 331:1295-9. [PMID: 21393539 DOI: 10.1126/science.1200320] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
A large fraction of atmospheric aerosols are derived from organic compounds with various volatilities. A National Oceanic and Atmospheric Administration (NOAA) WP-3D research aircraft made airborne measurements of the gaseous and aerosol composition of air over the Deepwater Horizon (DWH) oil spill in the Gulf of Mexico that occurred from April to August 2010. A narrow plume of hydrocarbons was observed downwind of DWH that is attributed to the evaporation of fresh oil on the sea surface. A much wider plume with high concentrations of organic aerosol (>25 micrograms per cubic meter) was attributed to the formation of secondary organic aerosol (SOA) from unmeasured, less volatile hydrocarbons that were emitted from a wider area around DWH. These observations provide direct and compelling evidence for the importance of formation of SOA from less volatile hydrocarbons.
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Affiliation(s)
- J A de Gouw
- Chemical Sciences Division, Earth System Research Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305, USA.
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Warneke C, McKeen SA, de Gouw JA, Goldan PD, Kuster WC, Holloway JS, Williams EJ, Lerner BM, Parrish DD, Trainer M, Fehsenfeld FC, Kato S, Atlas EL, Baker A, Blake DR. Determination of urban volatile organic compound emission ratios and comparison with an emissions database. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007930] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- C. Warneke
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - S. A. McKeen
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - J. A. de Gouw
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - P. D. Goldan
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - W. C. Kuster
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - J. S. Holloway
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - E. J. Williams
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - B. M. Lerner
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - D. D. Parrish
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - M. Trainer
- Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | | | - S. Kato
- Department of Chemistry; University of Colorado; Boulder Colorado USA
| | - E. L. Atlas
- Rosenstiel School of Marine and Atmospheric Science; University of Miami; Miami Florida USA
| | - A. Baker
- Department of Chemistry; University of California; Irvine California USA
| | - D. R. Blake
- Department of Chemistry; University of California; Irvine California USA
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Nowak JB, Neuman JA, Kozai K, Huey LG, Tanner DJ, Holloway JS, Ryerson TB, Frost GJ, McKeen SA, Fehsenfeld FC. A chemical ionization mass spectrometry technique for airborne measurements of ammonia. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007589] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J. B. Nowak
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - J. A. Neuman
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - K. Kozai
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - L. G. Huey
- School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
| | - D. J. Tanner
- School of Earth and Atmospheric Sciences; Georgia Institute of Technology; Atlanta Georgia USA
| | - J. S. Holloway
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - T. B. Ryerson
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - G. J. Frost
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - S. A. McKeen
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
| | - F. C. Fehsenfeld
- Cooperative Institute for Research in Environmental Sciences; University of Colorado; Boulder Colorado USA
- Chemical Sciences Division, Earth System Research Laboratory; NOAA; Boulder Colorado USA
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Cooper OR, Stohl A, Trainer M, Thompson AM, Witte JC, Oltmans SJ, Morris G, Pickering KE, Crawford JH, Chen G, Cohen RC, Bertram TH, Wooldridge P, Perring A, Brune WH, Merrill J, Moody JL, Tarasick D, Nédélec P, Forbes G, Newchurch MJ, Schmidlin FJ, Johnson BJ, Turquety S, Baughcum SL, Ren X, Fehsenfeld FC, Meagher JF, Spichtinger N, Brown CC, McKeen SA, McDermid IS, Leblanc T. Large upper tropospheric ozone enhancements above midlatitude North America during summer: In situ evidence from the IONS and MOZAIC ozone measurement network. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007306] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Warneke C, de Gouw JA, Stohl A, Cooper OR, Goldan PD, Kuster WC, Holloway JS, Williams EJ, Lerner BM, McKeen SA, Trainer M, Fehsenfeld FC, Atlas EL, Donnelly SG, Stroud V, Lueb A, Kato S. Biomass burning and anthropogenic sources of CO over New England in the summer 2004. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006878] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- C. Warneke
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - J. A. de Gouw
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - A. Stohl
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - O. R. Cooper
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - P. D. Goldan
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - W. C. Kuster
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - J. S. Holloway
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - E. J. Williams
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - B. M. Lerner
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - S. A. McKeen
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - M. Trainer
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - F. C. Fehsenfeld
- Chemical Sciences Division; NOAA Earth System Research Laboratory; Boulder Colorado USA
| | - E. L. Atlas
- Rosenstiel School of Marine and Atmospheric Science; University of Miami; Miami Florida USA
| | - S. G. Donnelly
- Department of Chemistry; Fort Hays State University; Fort Hays Kansas USA
| | - Verity Stroud
- National Center for Atmospheric Research; Boulder Colorado USA
| | - Amy Lueb
- National Center for Atmospheric Research; Boulder Colorado USA
| | - S. Kato
- Department of Chemistry; University of Colorado; Boulder Colorado USA
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Frost GJ, McKeen SA, Trainer M, Ryerson TB, Neuman JA, Roberts JM, Swanson A, Holloway JS, Sueper DT, Fortin T, Parrish DD, Fehsenfeld FC, Flocke F, Peckham SE, Grell GA, Kowal D, Cartwright J, Auerbach N, Habermann T. Effects of changing power plant NOxemissions on ozone in the eastern United States: Proof of concept. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006354] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bao JW, Michelson SA, McKeen SA, Grell GA. Meteorological evaluation of a weather-chemistry forecasting model using observations from the TEXAS AQS 2000 field experiment. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jd005024] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Melamed ML, Solomon S, Daniel JS, Langford AO, Portmann RW, Ryerson TB, Nicks DK, McKeen SA. Measuring reactive nitrogen emissions from point sources using visible spectroscopy from aircraft. J Environ Monit 2003; 5:29-34. [PMID: 12619753 DOI: 10.1039/b204220g] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Accurate measurements of nitrogen dioxide (NO2), a key trace gas in the formation and destruction of tropospheric ozone, are important in studies of urban pollution. Nitrogen dioxide column abundances were measured during the Texas Air Quality Study 2000 using visible absorption spectroscopy from an aircraft. The method allows for quantification of the integrated total number of nitrogen dioxide molecules in the polluted atmosphere and is hence a useful tool for measuring plumes of this key trace gas. Further, we show how such remote-sensing observations can be used to obtain information on the fluxes of nitrogen dioxide into the atmosphere with unique flexibility in terms of aircraft altitude, and the height and extent of mixing of the boundary layer. Observations of nitrogen dioxide plumes downwind of power plants were used to estimate the flux of nitrogen oxide emitted from several power plants in the Houston and Dallas metropolitan areas and in North Carolina. Measurements taken over the city of Houston were also employed to infer the total flux from the city as a whole.
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Affiliation(s)
- M L Melamed
- National Oceanic and Atmospheric Administration, Aeronomy Laboratory, Boulder, Colorado, USA
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Schmoltner AM, Talukdar RK, Warren RF, Mellouki A, Goldfarb L, Gierczak T, McKeen SA, Ravishankara AR. Rate coefficients for reactions of several hydrofluorocarbons with hydroxyl and oxygen atom(1D) and their atmospheric lifetimes. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100137a023] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Goldan PD, Parrish DD, Kuster WC, Trainer M, McKeen SA, Holloway J, Jobson BT, Sueper DT, Fehsenfeld FC. Airborne measurements of isoprene, CO, and anthropogenic hydrocarbons and their implications. ACTA ACUST UNITED AC 2000. [DOI: 10.1029/1999jd900429] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jobson BT, McKeen SA, Parrish DD, Fehsenfeld FC, Blake DR, Goldstein AH, Schauffler SM, Elkins JW. Trace gas mixing ratio variability versus lifetime in the troposphere and stratosphere: Observations. ACTA ACUST UNITED AC 1999. [DOI: 10.1029/1999jd900126] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ryerson TB, Buhr MP, Frost GJ, Goldan PD, Holloway JS, Hübler G, Jobson BT, Kuster WC, McKeen SA, Parrish DD, Roberts JM, Sueper DT, Trainer M, Williams J, Fehsenfeld FC. Emissions lifetimes and ozone formation in power plant plumes. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98jd01620] [Citation(s) in RCA: 178] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jobson BT, Frost GJ, McKeen SA, Ryerson TB, Buhr MP, Parrish DD, Trainer M, Fehsenfeld FC. Hydrogen peroxide dry deposition lifetime determined from observed loss rates in a power plant plume. ACTA ACUST UNITED AC 1998. [DOI: 10.1029/98jd01619] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wennberg PO, Hanisco TF, Jaegle L, Jacob DJ, Hintsa EJ, Lanzendorf EJ, Anderson JG, Gao R, Keim ER, Donnelly SG, Negro LAD, Fahey DW, McKeen SA, Salawitch RJ, Webster CR, May RD, Herman RL, Proffitt MH, Margitan JJ, Atlas EL, Schauffler SM, Flocke F, McElroy CT, Bui TP. Hydrogen radicals, nitrogen radicals, and the production of O3 in the upper troposphere. Science 1998; 279:49-53. [PMID: 9417019 DOI: 10.1126/science.279.5347.49] [Citation(s) in RCA: 295] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The concentrations of the hydrogen radicals OH and HO2 in the middle and upper troposphere were measured simultaneously with those of NO, O3, CO, H2O, CH4, non-methane hydrocarbons, and with the ultraviolet and visible radiation field. The data allow a direct examination of the processes that produce O3 in this region of the atmosphere. Comparison of the measured concentrations of OH and HO2 with calculations based on their production from water vapor, ozone, and methane demonstrate that these sources are insufficient to explain the observed radical concentrations in the upper troposphere. The photolysis of carbonyl and peroxide compounds transported to this region from the lower troposphere may provide the source of HOx required to sustain the measured abundances of these radical species. The mechanism by which NO affects the production of O3 is also illustrated by the measurements. In the upper tropospheric air masses sampled, the production rate for ozone (determined from the measured concentrations of HO2 and NO) is calculated to be about 1 part per billion by volume each day. This production rate is faster than previously thought and implies that anthropogenic activities that add NO to the upper troposphere, such as biomass burning and aviation, will lead to production of more O3 than expected.
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Affiliation(s)
- PO Wennberg
- P. O. Wennberg, T. F. Hanisco, E. J. Hintsa, E. J. Lanzendorf, J. G. Anderson, Department of Chemistry and Chemical Biology and Department of Earth and Planetary Sciences, Harvard University, 12 Oxford Street, Cambridge, MA 02138, USA. L. Ja
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McKeen SA, Mount G, Eisele F, Williams E, Harder J, Goldan P, Kuster W, Liu SC, Baumann K, Tanner D, Fried A, Sewell S, Cantrell C, Shetter R. Photochemical modeling of hydroxyl and its relationship to other species during the Tropospheric OH Photochemistry Experiment. ACTA ACUST UNITED AC 1997. [DOI: 10.1029/96jd03322] [Citation(s) in RCA: 113] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Lin X, Zaucker F, Hsie EY, Trainer M, McKeen SA. Radon 222 simulations as a test of a three-dimensional regional transport model. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/96jd00100] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Liu SC, McKeen SA, Hsie EY, Lin X, Kelly KK, Bradshaw JD, Sandholm ST, Browell EV, Gregory GL, Sachse GW, Bandy AR, Thornton DC, Blake DR, Rowland FS, Newell R, Heikes BG, Singh H, Talbot RW. Model study of tropospheric trace species distributions during PEM-West A. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/95jd02277] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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McKeen SA, Liu SC, Hsie EY, Lin X, Bradshaw JD, Smyth S, Gregory GL, Blake DR. Hydrocarbon ratios during PEM-WEST A: A model perspective. ACTA ACUST UNITED AC 1996. [DOI: 10.1029/95jd02733] [Citation(s) in RCA: 125] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Lin X, Ridley BA, Walega J, Hübler GF, McKeen SA, Hsie EY, Trainer M, Fehsenfeld FC, Liu SC. Parameterization of subgrid scale convective cloud transport in a mesoscale regional chemistry model. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/94jd02398] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Talukdar R, Mellouki A, Gierczak T, Burkholder JB, McKeen SA, Ravishankara AR. Atmospheric Lifetime of CHF2Br, a Proposed Substitute for Halons. Science 1991; 252:693-5. [PMID: 17746668 DOI: 10.1126/science.252.5006.693] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
The rate coefficients, k(1), for the reaction of OH with CHF(2)Br have been measured using pulsed photolysis and discharge flow techniques at temperatures (T) between 233 and 432 K to be k(1), = (7.4 +/- 1.6) x 10(-13) exp[-(1300 +/- 100)/T] cubic centimeters per molecule per second. The ultraviolet absorption cross sections, sigma, of this molecule between 190 and 280 nanometers were measured at 296 K. The k(1), and sigma values were used in a one-dimensional model to obtain an atmospheric lifetime of approximately 7 years for CHF(2)Br. This lifetime is shorter by approximately factors of 10 and 2 than those for CF(3)Br and CF(2)ClBr, respectively. The ozone depletion potentials of the three compounds will reflect these lifetimes.
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McKeen SA, Hsie EY, Trainer M, Tallamraju R, Liu SC. A regional model study of the ozone budget in the eastern United States. ACTA ACUST UNITED AC 1991. [DOI: 10.1029/91jd00052] [Citation(s) in RCA: 107] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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McKeen SA, Hsie EY, Liu SC. A study of the dependence of rural ozone on ozone precursors in the eastern United States. ACTA ACUST UNITED AC 1991. [DOI: 10.1029/91jd01282] [Citation(s) in RCA: 96] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Trainer M, Hsie EY, McKeen SA, Tallamraju R, Parrish DD, Fehsenfeld FC, Liu SC. Impact of natural hydrocarbons on hydroxyl and peroxy radicals at a remote site. ACTA ACUST UNITED AC 1987. [DOI: 10.1029/jd092id10p11879] [Citation(s) in RCA: 212] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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