Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Entire DC Network
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 …