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Nocturnal Isoprene Oxidation Over The Northeast United States In Summer And Its Impact On Reactive Nitrogen Partitioning And Secondary Organic Aerosol, S. Brown, J. Degouw, C. Warneke, T. Ryerson, W. Dubé, E. Atlas, R. Weber, Richard Peltier, J. Neuman, J. Roberts, A. Swanson, F. Flocke, S. Mckeen, J. Brioude, R. Sommariva, M. Trainer, F. Fehsenfeld, A. Ravishankara
Nocturnal Isoprene Oxidation Over The Northeast United States In Summer And Its Impact On Reactive Nitrogen Partitioning And Secondary Organic Aerosol, S. Brown, J. Degouw, C. Warneke, T. Ryerson, W. Dubé, E. Atlas, R. Weber, Richard Peltier, J. Neuman, J. Roberts, A. Swanson, F. Flocke, S. Mckeen, J. Brioude, R. Sommariva, M. Trainer, F. Fehsenfeld, A. Ravishankara
Richard E. Peltier
Isoprene is the largest single VOC emission to the atmosphere. Although it is primarily oxidized photochemi- cally during daylight hours, late-day emissions that remain in the atmosphere at sunset undergo oxidation by NO 3 in regionally polluted areas with large NO x levels. A recent aircraft study examined isoprene and its nocturnal oxidants in a series of night flights across the Northeast US, a re- gion with large emissions of both isoprene and NO x . Sub- stantial amounts of isoprene that were observed after dark were strongly anticorrelated with measured NO 3 and were the most important factor determining …
Sources Of Particulate Matter In The Northeastern United States In Summer: 1. Direct Emissions And Secondary Formation Of Organic Matter In Urban Plumes, J. A. De Gouw, C. A. Brock, E. L. Atlas, T. S. Bates, F. C. Fehsenfeld, P. D. Goldan, J. S. Holloway, W.C. Kuster, B. M. Lerner, B. M. Matthew, A. M. Middlebrook, T. B. Onasch, Richard Peltier, P. K. Quinn, C. J. Senff, A. Stohl, A. P. Sullivan, M. Trainer, C. Warneke, R. J. Weber, E. J. Williams
Sources Of Particulate Matter In The Northeastern United States In Summer: 1. Direct Emissions And Secondary Formation Of Organic Matter In Urban Plumes, J. A. De Gouw, C. A. Brock, E. L. Atlas, T. S. Bates, F. C. Fehsenfeld, P. D. Goldan, J. S. Holloway, W.C. Kuster, B. M. Lerner, B. M. Matthew, A. M. Middlebrook, T. B. Onasch, Richard Peltier, P. K. Quinn, C. J. Senff, A. Stohl, A. P. Sullivan, M. Trainer, C. Warneke, R. J. Weber, E. J. Williams
Richard E. Peltier
Ship and aircraft measurements of aerosol organic matter (OM) and water-soluble organic carbon (WSOC) were made in fresh and aged pollution plumes from major urban areas in the northeastern United States in the framework of the 2004 International Consortium for Atmospheric Research on Transport and Transformation (ICARTT) study. A large part of the variability in the data was quantitatively described by a simple parameterization from a previous study that uses measured mixing ratios of CO and either the transport age or the photochemical age of the sampled air masses. The results suggest that OM was mostly due to secondary formation …
Sources Of Particulate Matter In The Northeastern United States In Summer: 2. Evolution Of Chemical And Microphysical Properties, C. A. Brock, A. P. Sullivan, Richard E. Peltier, R. J. Weber, A. Wollny, J. A. De Gouw, A. M. Middlebrook, E. L. Atlas, A. Stohl, M. K. Trainer, O. R. Cooper, F. C. Fehsenfeld, G. J. Frost, J. S. Holloway, G. Hübler, J. A. Neuman, T. B. Ryerson, C. Warneke, J. C. Wilson
Sources Of Particulate Matter In The Northeastern United States In Summer: 2. Evolution Of Chemical And Microphysical Properties, C. A. Brock, A. P. Sullivan, Richard E. Peltier, R. J. Weber, A. Wollny, J. A. De Gouw, A. M. Middlebrook, E. L. Atlas, A. Stohl, M. K. Trainer, O. R. Cooper, F. C. Fehsenfeld, G. J. Frost, J. S. Holloway, G. Hübler, J. A. Neuman, T. B. Ryerson, C. Warneke, J. C. Wilson
Richard E. Peltier
Measurements of aerosol particle size distributions and composition and of trace and reactive gas mixing ratios were made on the NOAA WP-3D aircraft downwind of mixed urban/industrial sources in the northeastern United States (U.S.). These measurements were made in noncloudy air during July and August 2004, under conditions where cloud processing was not likely to play an important role in oxidation chemistry. Under these conditions, particulate sulfate was found to be produced with an exponential time constant of 3.5 d from the gas-phase oxidation of SO2, which was ubiquitous but inhomogeneously distributed in the pollution plumes. When submicron particle mass …
Apportionment Of Primary And Secondary Organic Aerosols In Southern California During The 2005 Study Of Organic Aerosols In Riverside (Soar-1), Kenneth Docherty, Elizabeth Stone, Ingrid Ulbrich, Peter Decarlo, David C. Snyder, James Schauer, Richard Peltier, Rodney Weber, Shane Murphy, John Seinfeld, Brett Grover, Delbert Eatough, Jose Jimenez
Apportionment Of Primary And Secondary Organic Aerosols In Southern California During The 2005 Study Of Organic Aerosols In Riverside (Soar-1), Kenneth Docherty, Elizabeth Stone, Ingrid Ulbrich, Peter Decarlo, David C. Snyder, James Schauer, Richard Peltier, Rodney Weber, Shane Murphy, John Seinfeld, Brett Grover, Delbert Eatough, Jose Jimenez
Richard E. Peltier
Ambient sampling was conducted in Riverside, California during the 2005 Study of Organic Aerosols in Riverside to characterize the composition and sources of organic aerosol using a variety of state-of-the-art instrumentation and source apportionment techniques. The secondary organic aerosol (SOA) mass is estimated by elemental carbon and carbon monoxide tracer methods, water soluble organic carbon content, chemical mass balance of organic molecular markers, and positive matrix factorization of high-resolution aerosol mass spectrometer data. Estimates obtained from each of these methods indicate that the organic fraction in ambient aerosol is overwhelmingly secondary in nature during a period of several weeks with …
On The Volatility And Production Mechanisms Of Newly Formed Nitrate And Water Soluble Organic Aerosol In Mexico City, C. J. Hennigan, A. P. Sullivan, C. I. Fountoukis, A. Nenes, A. Hecobian, O. Vargas, Richard E. Peltier, A. T. Case Hanks, L. G. Huey, B. L. Lefer
On The Volatility And Production Mechanisms Of Newly Formed Nitrate And Water Soluble Organic Aerosol In Mexico City, C. J. Hennigan, A. P. Sullivan, C. I. Fountoukis, A. Nenes, A. Hecobian, O. Vargas, Richard E. Peltier, A. T. Case Hanks, L. G. Huey, B. L. Lefer
Richard E. Peltier
Measurements of atmospheric gases and fine par- ticle chemistry were made in the Mexico City Metropolitan Area (MCMA) at a site ∼ 30 km down wind of the city cen- ter. Ammonium nitrate (NH 4 NO 3 ) dominated the inorganic aerosol fraction and showed a distinct diurnal signature char- acterized by rapid morning production and a rapid mid-day concentration decrease. Between the hours of 08:00–12:45, particulate water-soluble organic carbon (WSOC) concentra- tions increased and decreased in a manner consistent with that of NO − 3 , and the two were highly correlated ( R 2 =0.88) during this time. …
A Study Of Secondary Organic Aerosol Formation In The Anthropogenic-Influenced Southeastern United States, Rodney Weber, Amy Sullivan, Richard Peltier, Armistead Russell, Bo Yan, Mei Zheng, Joost De Gouw, Carsten Warneke, Charles Brock, John Holloway, Elliot Atlas, Eric Edgerton
A Study Of Secondary Organic Aerosol Formation In The Anthropogenic-Influenced Southeastern United States, Rodney Weber, Amy Sullivan, Richard Peltier, Armistead Russell, Bo Yan, Mei Zheng, Joost De Gouw, Carsten Warneke, Charles Brock, John Holloway, Elliot Atlas, Eric Edgerton
Richard E. Peltier
The formation of secondary organic aerosol (SOA) in an anthropogenic-influenced region in the southeastern United States is investigated by a comparison with urban plumes in the northeast. The analysis is based on measurements of fine-particle organic compounds soluble in water (WSOC) as a measure of secondary organic aerosol. Aircraft measurements over a large area of northern Georgia, including the Atlanta metropolitan region, and in plumes from New York City and surrounding urban regions in the northeast show that fine-particle WSOC are spatially correlated with vehicle emission tracers (e.g., CO), yet the measurements indicate that vehicles do not directly emit significant …
No Evidence For Acid-Catalyzed Secondary Organic Aerosol Formation In Power Plant Plumes Over Metropolitan Atlanta, Georgia, Richard E. Peltier, A. P. Sullivan, R. J. Weber, A. G. Wollny, J. S. Holloway, C. A. Brock, J. A. De Gouw, E. L. Atlas
No Evidence For Acid-Catalyzed Secondary Organic Aerosol Formation In Power Plant Plumes Over Metropolitan Atlanta, Georgia, Richard E. Peltier, A. P. Sullivan, R. J. Weber, A. G. Wollny, J. S. Holloway, C. A. Brock, J. A. De Gouw, E. L. Atlas
Richard E. Peltier
Aircraft-based measurements of the water-soluble fraction of fine PM organic carbon (WSOC) and inorganic salt composition in the Atlanta, GA region were conducted in the summer of 2004. Five notable plumes of SO2, apparently from coal-fired power plants, were intercepted, and had NH4 +/SO42 molar ratios ranging from approximately 0.8 to 1.4 compared to molar ratios near 2 outside of the plumes. Sulfate aerosol concentrations increased from a regional background of 5–8 mg m 3 to as high as 19.5 mg m 3 within these plumes. No increase in WSOC concentrations was observed in plumes compared to out-of plumes within …
Investigating The Sources And Atmospheric Processing Of Fine Particles From Asia And The Northwestern United States Measured During Intex B, Richard E. Peltier, A. H. Hecobian, R. J. Weber, A. Stohl, E. L. Atlas, D. D. Riemer, D. R. Blake, E. Apel, T. Campos, T. Karl
Investigating The Sources And Atmospheric Processing Of Fine Particles From Asia And The Northwestern United States Measured During Intex B, Richard E. Peltier, A. H. Hecobian, R. J. Weber, A. Stohl, E. L. Atlas, D. D. Riemer, D. R. Blake, E. Apel, T. Campos, T. Karl
Richard E. Peltier
During the National Aeronautics and Space Ad- ministration (NASA) Intercontinental Chemical Transport Experiment, Phase B (INTEX-B), in the spring of 2006, air- borne measurements were made in the United States Pacific Northwest of the major inorganic ions and the water-soluble organic carbon (WSOC) of submicron (PM 1 . 0 ) aerosol. An atmospheric trajectory (HYSPLIT) and a Lagrangian particle dispersion model (Flexpart) quantifying source contributions for carbon monoxide (CO) were used to segregate air masses into those of primarily Asian influence ( > 75% Asian CO) or North American influence ( > 75% North American CO). Of the measured compounds, fine particle …
Airborne Measurements Of Carbonaceous Aerosol Soluble In Water Over Northeastern United States: Method Development And An Investigation Into Water-Soluble Organic Carbon Sources, A. P. Sullivan, Richard E. Peltier, C. A. Brock, J. A. De Gouw, J. S. Holloway, C. Warneke, A. G. Wollny, R. J. Weber
Airborne Measurements Of Carbonaceous Aerosol Soluble In Water Over Northeastern United States: Method Development And An Investigation Into Water-Soluble Organic Carbon Sources, A. P. Sullivan, Richard E. Peltier, C. A. Brock, J. A. De Gouw, J. S. Holloway, C. Warneke, A. G. Wollny, R. J. Weber
Richard E. Peltier
A particle-into-liquid sampler (PILS) was coupled to a total organic carbon (TOC) analyzer for 3 s integrated measurements of water-soluble organic carbon (WSOC) in PM1 ambient particles. The components of the instrument are described in detail. The PILS-TOC was deployed on the NOAA WP-3D aircraft during the NEAQS/ITCT 2004 program to investigate WSOC sources over the northeastern United States and Canada. Two main sources were identified: biomass burning emissions from fires in Alaska and northwestern Canada and emissions emanating from urban centers. Biomass burning WSOC was correlated with carbon monoxide (CO) and acetonitrile (r2 > 0.88). These plumes were intercepted in …
Concentrations And Sources Of Organic Carbon Aerosols In The Free Troposphere Over North America, Colette L. Heald, Daniel J. Jacob, Solène Turquety, Rynda C. Hudman, Rodney J. Weber, Amy P. Sullivan, Richard E. Peltier, Eliot L. Atlas, Joost A. De Gouw, Carsten Warneke, John S. Holloway, J. Andrew Neuman, John H. Seinfeld, Frank M. Flocke
Concentrations And Sources Of Organic Carbon Aerosols In The Free Troposphere Over North America, Colette L. Heald, Daniel J. Jacob, Solène Turquety, Rynda C. Hudman, Rodney J. Weber, Amy P. Sullivan, Richard E. Peltier, Eliot L. Atlas, Joost A. De Gouw, Carsten Warneke, John S. Holloway, J. Andrew Neuman, John H. Seinfeld, Frank M. Flocke
Richard E. Peltier
Aircraft measurements of water-soluble organic carbon (WSOC) aerosol over NE North America during summer 2004 (ITCT-2K4) are simulated with a global chemical transport model (GEOS-Chem) to test our understanding of the sources of organic carbon (OC) aerosol in the free troposphere (FT). Elevated concentrations were observed in plumes from boreal fires in Alaska and Canada. WSOC aerosol concentrations outside of these plumes average 0.9 ± 0.9 mg C m 3 in the FT (2–6 km). The corresponding model value is 0.7 ± 0.6 mg C m 3, including 42% from biomass burning, 36% from biogenic secondary organic aerosol (SOA), and …
Single-Particle Mass Spectrometry Of Tropospheric Aerosol Particles, D. M. Murphy, D. J. Cziczo, K. D. Froyd, P. K. Hudson, B. M. Matthew, A. M. Middlebrook, Richard E. Peltier, A. Sullivan, D. S. Thomson, R. J. Weber
Single-Particle Mass Spectrometry Of Tropospheric Aerosol Particles, D. M. Murphy, D. J. Cziczo, K. D. Froyd, P. K. Hudson, B. M. Matthew, A. M. Middlebrook, Richard E. Peltier, A. Sullivan, D. S. Thomson, R. J. Weber
Richard E. Peltier
The Particle Analysis by Laser Mass Spectrometry (PALMS) instrument has measured the composition of single particles during a number of airborne and ground-based campaigns. In the regions studied, 30% to over 80% of the aerosol mass in the free troposphere was carbonaceous material. Most of this carbonaceous material was probably organic. Although there were variations in their amounts, over 90% of accumulation mode particles away from local sources were internal mixtures of sulfates and carbonaceous material. Within this internal mixing, there was variation in the pattern of carbonaceous peaks in the spectra, especially in peaks related to organic acids. Particles …
Reactive Nitrogen Transport And Photochemistry In Urban Plumes Over The North Atlantic Ocean, J. A. Neuman, D. D. Parrish, M. Trainer, T. B. Ryerson, J. S. Holloway, J. B. Nowak, A. Swanson, F. Flocke, J. M. Roberts, S. S. Brown, H. Stark, R. Sommariva, A. Stohl, Richard Peltier, R. Weber, A. G. Wollny, D. T. Sueper, G. Hubler, F. C. Fehsenfeld
Reactive Nitrogen Transport And Photochemistry In Urban Plumes Over The North Atlantic Ocean, J. A. Neuman, D. D. Parrish, M. Trainer, T. B. Ryerson, J. S. Holloway, J. B. Nowak, A. Swanson, F. Flocke, J. M. Roberts, S. S. Brown, H. Stark, R. Sommariva, A. Stohl, Richard Peltier, R. Weber, A. G. Wollny, D. T. Sueper, G. Hubler, F. C. Fehsenfeld
Richard E. Peltier
Photochemical and transport processes involving reactive nitrogen compounds were studied in plumes of urban pollutants using measurements obtained from the NOAA WP-3 aircraft during the ICARTT study in July and August 2004. Observations close to Boston and New York City were used to characterize urban emissions, and plume transport and transformation processes were studied in aged plumes located up to 1000 km downwind from the east coast of North America. Pollution was observed primarily below 1.5 km altitude in well-defined layers that were decoupled from the marine boundary layer. In aged plumes located over the North Atlantic Ocean, the nitric …
Nocturnal Odd-Oxygen Budget And Its Implications For Ozone Loss In The Lower Troposphere, S. S. Brown, J. A. Neuman, T. B. Ryerson, M. Trainer, W. P. Dubé, J. S. Holloway, C. Warneke, J. A. De Gouw, S. G. Donnelly, E. Atlas, B. Matthew, A. M. Middlebrook, Richard Peltier, R. J. Weber, A. Stohl, J. F. Meagher, F. C. Fehsenfeld, A. R. Ravishankar
Nocturnal Odd-Oxygen Budget And Its Implications For Ozone Loss In The Lower Troposphere, S. S. Brown, J. A. Neuman, T. B. Ryerson, M. Trainer, W. P. Dubé, J. S. Holloway, C. Warneke, J. A. De Gouw, S. G. Donnelly, E. Atlas, B. Matthew, A. M. Middlebrook, Richard Peltier, R. J. Weber, A. Stohl, J. F. Meagher, F. C. Fehsenfeld, A. R. Ravishankar
Richard E. Peltier
Nitrogen oxides are important to the regulation of ozone throughout the Earth’s atmosphere. Of particular interest for regional air quality is photochemical production and nocturnal destruction of O3 in the lower troposphere in high NOx(=NO + NO2) environments. Nocturnal tropospheric odd oxygen (Ox), defined as O3 + NO2 + 2NO3 + 3N2O5, is used to assess the impact of NOx emissions on nocturnal O3 loss. Recent aircraft measurements of the components of Ox and HNO3 yield a detailed accounting of the nocturnal Ox budget in a regionally polluted environment. The analysis demonstrates the role of NO3 and N2O5 reactions in …