Now showing items 1-8 of 8

    • Airborne measurements of organosulfates over the continental U.S. 

      Liao, Jin; Froyd, Karl D; Murphy, Daniel M; Keutsch, Frank N; Yu, Ge; Wennberg, Paul O; St Clair, Jason M; Crounse, John D; Wisthaler, Armin; Mikoviny, Tomas; Jimenez, Jose L; Campuzano-Jost, Pedro; Day, Douglas A; Hu, Weiwei; Ryerson, Thomas B; Pollack, Ilana B; Peischl, Jeff; Anderson, Bruce E; Ziemba, Luke D; Blake, Donald R; Meinardi, Simone; Diskin, Glenn (John Wiley & Sons, Ltd, 2015)
      Organosulfates are important secondary organic aerosol (SOA) components and good tracers for aerosol heterogeneous reactions. However, the knowledge of their spatial distribution, formation conditions, and environmental ...
    • Atmospheric Chemistry and the Biosphere: General Discussion 

      Archibald, Alexander; Freedman, Arnold; Bejan, Lustian; Brown, Steven; Brüggemann, Martin; Carpenter, Lucy; Collins, John; Evans, Mathew; Finlayson-Pitts, Barbara; George, Christian; Hastings, Meredith; Heard, Dwayne; Hewitt, Christopher; Isaacman-VanWertz, Gabriel; Kalberer, Markus; Keutsch, Frank; Kiendler-Scharr, Astrid; Knopf, Daniel; Lelieveld, Jos; Marais, Eloise; Petzold, Andreas; Ravishankara, A.; Reid, Jonathan; Rovelli, Grazia; Scott, Catherine; Sherwen, Tomás; Shindell, Drew; Tinel, Liselotte; Unger, Nadine; Wallington, Timothy J.; Wahner, Andreas; Williams, Jonathan; Young, Timothy; Zelenyuk, Alla; Wallington, Timothy (Royal Society of Chemistry (RSC), 2017)
      Lucy Carpenter opened discussion of the paper by Christian George: Your previous work has emphasised the abiotic production of VOCs from surface ocean processes, mainly from photosensitized chemistry of surfactants. Does ...
    • Formaldehyde (HCHO) As a Hazardous Air Pollutant: Mapping Surface Air Concentrations from Satellite and Inferring Cancer Risks in the United States 

      Zhu, Lei; Jacob, Daniel; Keutsch, Frank; Mickley, Loretta; Scheffe, Richard; Strum, Madeleine; González Abad, Gonzalo; Chance, Kelly; Yang, Kai; Rappenglück, Bernhard; Millet, Dylan; Baasandorj, Munkhbayar; Jaeglé, Lyatt; Shah, Viral (American Chemical Society (ACS), 2017-05-05)
      Formaldehyde (HCHO) is the most important carcinogen in outdoor air among the 187 hazardous air pollutants (HAPs) identified by the U.S. Environmental Protection Agency (EPA), not including ozone and particulate matter. ...
    • Glyoxal Yield From Isoprene Oxidation and Relation to Formaldehyde: Chemical Mechanism, Constraints From SENEX Aircraft Observations, and Interpretation of OMI Satellite Data 

      Miller, Christopher; Jacob, Daniel; Marais, Elose; Yu, Karen; Travis, Katherine; Kim, Patrick S.; Fisher, Jenny A.; Zhu, Lei; Wolfe, Glenn M.; Hanisco, Thomas F.; Keutsch, Frank; Kaiser, Jennifer; Min, Kyung-Eun; Brown, Steven S.; Washenfelder, Rebecca A.; Gonzalez Abad, Gonzalo; Chance, Kelly (Copernicus GmbH, 2017-07-18)
      Glyoxal (CHOCHO) is produced in the atmosphere by the oxidation of volatile organic compounds (VOCs). Like formaldehyde (HCHO), another VOC oxidation product, it is measurable from space by solar backscatter. Isoprene ...
    • Molecular Composition and Volatility of Isoprene Photochemical Oxidation Secondary Organic Aerosol Under Low- and High-NOx Conditions 

      D'Ambro, Emma; Leeming, Benjamin; Liu, Jiumeng; Shilling, John; Gaston, Cassandra; Lopez-Hilfiker, Felipe; Schobesberger, Siegfried; Zaveri, Rahul; Mohr, Claudia; Lutz, Anna; Zhang, Zhenfa; Gold, Avram; Surratt, Jason; Rivera-Rios, Jean; Keutsch, Frank; Thornton, Joel (Copernicus GmbH, 2017-01-04)
      We present measurements of secondary organic aerosol (SOA) formation from isoprene photochemical oxidation in an environmental simulation chamber at a variety of oxidant conditions and using dry neutral seed particles to ...
    • Observations of VOC Emissions and Photochemical Products Over US Oil- and Gas-Producing Regions Using High-Resolution H3O+ CIMS (PTR-ToF-MS) 

      Koss, Abigail; Yuan, Bin; Warneke, Carsten; Gilman, Jessica; Lerner, Brian; Veres, Patrick; Peischl, Jeff; Eilerman, Scott; Wild, Robert; Brown, Steven; Thompson, Chelsea; Ryerson, Thomas; Hanisco, Thomas; Wolfe, Glenn; St. Clair, Jason; Thayer, Mitchell; Keutsch, Frank; Murphy, Shane; de Gouw, Joost (Copernicus GmbH, 2017-08-16)
      Abstract. VOCs related to oil and gas extraction operations in the United States were measured by H3O+ chemical ionization time-of-flight mass spectrometry (H3O+ ToF-CIMS/PTR-ToF-MS) from aircraft during the Shale Oil and ...
    • Polloneite, a New Complex Pb(-Ag)-as-Sb Sulfosalt From the Pollone Mine, Apuan Alps, Tuscany, Italy 

      Topa, Dan; Keutsch, Frank; Makovicky, Emil; Kolitsch, Uwe; Paar, Werner (Mineralogical Society, 2017-12)
      Polloneite, ideally AgPb46As26Sb23S120, is a new N = 4 member of the sartorite homologous series. It occurs in a matrix of baryte from the Pizzone level of the Pollone baryte-pyrite-(Pb-Zn-Ag) deposit at Valdicastello ...
    • Technical note: Conversion of isoprene hydroxy hydroperoxides (ISOPOOHs) on metal environmental simulation chamber walls 

      Bernhammer, Anne-Kathrin; Breitenlechner, Martin; Keutsch, Frank; Hansel, Armin (Copernicus GmbH, 2017-03-24)
      Sources and sinks of isoprene oxidation products from low-NOx isoprene chemistry have been studied at the CERN CLOUD (Cosmics Leaving Outdoor Droplets) chamber with a custom-built selective reagent ion time-of-flight mass ...