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Observationally Derived Transport Diagnostics for the Lowermost St...

By: B. N. Duncan; P. Hoor; S. E. Strahan

Description: Goddard Earth Science and Technology Center, University of Maryland, Baltimore County, Baltimore, MD 21250, USA. Transport from the surface to the lowermost stratosphere can occur on timescales of a few months or less, making it possible for short-lived tropospheric pollutants to influence stratospheric composition and chemistry. Models used to study this influence must demonstrate the credibility of their chemistry and transport in the upper tropospher...

Bey, I., Jacob, D. J.,Yantosca, R. M., et al.: Global modeling of tropospheric chemistry with assimilated meteorology: Model description and evaluation, J. Geophys. Res., 106, 23 073–23 095, 2001.; Bian, H. and Prather, M.J.: Fast-J2: Accurate simulation of stratospheric photolysis in global chemical~ models, J. Atmos. Chem., 41, 281–296, 2002.; Bloom, S. C., da Silva, A. M., Dee, D. P., et al.: The Goddard Earth Observation System Data Assimilation System, GEOS DAS Vers...

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Transport of Aerosol Pollution in the Utls During Asian Summer Mon...

By: K. Semeniuk; S. Das; M. G. Schultz; L. Pozzoli; S. Fadnavis; S. D. Ghude

Description: Indian Institute of Tropical Meteorology, Pune, India. An eight member ensemble of ECHAM5-HAMMOZ simulations for the year 2003 is analyzed to study the transport of aerosols in the Upper Troposphere and Lower Stratosphere (UTLS) during the Asian Summer Monsoon (ASM). Simulations show persistent maxima in black carbon, organic carbon, sulfate, and mineral dust aerosols within the anticyclone in the UTLS throughout the ASM (period from July to September) ...

Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle Atmosphere Dynamics, Academic Press, New York, 489 pp., 1987.; Antuña, J. C., Robock, A., Stenchikov, G. L., Thomason, L. W., and Barnes, J. E.: Lidar validation of SAGE II aerosol measurements after the 1991 Mount Pinatubo eruption, J. Geophys. Res., 107, 4194, doi:10.1029/2001JD001441, 2002.; Auvray, M., Bey, I., Llull, E., Schultz, M. G., and Rast, S.: A model in...

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Oh Initiated Heterogeneous Oxidation of Tris-2-butoxyethyl Phospha...

By: L. Huang; T. Harner; S.-m. Li; J. Liggio; Y. Liu

Description: Atmospheric Science and Technology Directorate, Science and Technology Branch, Environment Canada, Toronto, M3H 5T4, Canada. A particle-phase relative rates technique is used to investigate the heterogeneous reaction between OH radicals and tris-2-butoxyethyl phosphate (TBEP) at 298 K by combining Aerosol Time-of-Flight Mass Spectrometry (C-ToF-MS) data and Positive Matrix Factor (PMF) analysis. The derived second-order rate constants (k

Abbatt, J. P. D., Lee, A. K. Y., and Thornton, J. A.: Quantifying trace gas uptake to tropospheric aerosol: recent advances and remaining challenges, Chem. Soc. Rev., 41, 6555–6581, doi:10.1039/c2cs35052a, 2012.; Abramson, E., Imre, D., Beranek, J., Wilson, J., and Zelenyuk, A.: Experimental determination of chemical diffusion within secondary organic aerosol particles, Phys. Chem. Chem. Phys., 15, 2983–2991,

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The Genesis of Typhoon Nuri as Observed During the Tropical Cyclon...

By: M. M. Bell; L. L. Lussier III; M. T. Montgomery

Description: Naval Postgraduate School, Monterey, California, USA. Aircraft reconnaissance data collected during the Tropical Cyclone Structure 2008 field campaign are used to examine further kinematical, dynamical and thermodynamical aspects of the genesis of Typhoon Nuri. Data from the first two missions into the pre-Nuri disturbance document the transition from a tropical wave to a tropical depression. Dropwindsonde-derived tangential wind profiles at several ...

AMS Statement: Hurricane forecasting in the United States, B. Am. Meteorol. Soc., 88, 950–951, 2007.; Bell, M. M., Montgomery, M. T., and Emanuel, K. A.: Air-sea enthalpy and momentum exchange at major hurricane wind speeds observed during CBLAST, J. Atmos. Sci., 69, 3197–3222, 2012.; Bell, M. M., Lee, W.-C., Wolff, C., and Cai, H.: A solo-based automated quality control algorithm for airborne Doppler tail radar data, J. Appl. Meteorol. Climatol., in press, 2013.; Chang,...

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Primary and Secondary Organic Carbon Downwind of Mexico City : Vol...

By: R. A. Cary; N. S. Laulainen; X.-y. Yu

Description: Pacific Northwest National Laboratory, Richland, WA 99352, USA. In order to study particulate matter transport and transformation in the Megacity environment, fine particulate carbons were measured simultaneously at two supersites, suburban T1 and rural T2, downwind of Mexico City during the MILAGRO field campaign in March 2006. Organic carbon (OC), element carbon (EC), and total carbon (TC=OC+EC) were determined in near real-time usi...

Allen,~G A., Lawrence,~J., and Koutrakis,~P.: Field validation of a~semi-continuous method for aerosol black carbon (aethalometer) and temporal patterns of summertime hourly black carbon measurements in southwestern PA, Atmos. Environ., 33(5), 817–823, 1999.; Bauer,~J J., Yu,~X.-Y., Laulainen,~N S., et al.: Characterization of the Sunset Semi-Continuous Carbon Aerosol Analyzer, J Air Waste Management Assoc., accepted, 2009.; Birch,~M E.: Analysis of carbonaceous aerosols...

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Primary and Secondary Biomass Burning Aerosols Determined by Proto...

By: S. Fuzzi; L. Giulianelli; F. Moretti; M. C. Facchini; C. Carbone; R. Hillamo; E. Finessi; E. Tagliavini; K. Eriksson Stenström; M. Paglione; S. Saarikoski; P. Massoli; S. Carbone; D. Worsnop; A. S. H. Prévôt; E. Swietlicki; M. Canaragatna; S. Decesari

Description: National Research Council (CNR), Institute of Atmospheric Sciences and Climate (ISAC), Bologna, Italy. Atmospheric organic aerosols are generally classified as primary and secondary (POA and SOA) according to their formation processes. An actual separation, however, is challenging when the timescales of emission and gas-to-particle formation overlap. The presence of SOA formation in biomass burning plumes leads to scientific questions about whether the ...

Aiken, A. C., de Foy, B., Wiedinmyer, C., DeCarlo, P. F., Ulbrich, I. M., Wehrli, M. N., Szidat, S., Prevot, A. S. H., Noda, J., Wacker, L., Volkamer, R., Fortner, E., Wang, J., Laskin, A., Shutthanandan, V., Zheng, J., Zhang, R., Paredes-Miranda, G., Arnott, W. P., Molina, L. T., Sosa, G., Querol, X., and Jimenez, J. L.: Mexico city aerosol analysis during MILAGRO using high resolution aerosol mass spectrometry at the urban supersite (T0) – Part 2: Analysis of the bioma...

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The Millennium Water Vapour Drop in Chemistry-climate Model Simula...

By: S. Lossow; S. Brinkop; G. Stiller; P. Jöckel; M. Dameris; H. Garny

Description: Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany. This study investigates the abrupt and severe water vapour decline in the stratosphere beginning in year 2000 (the millennium water vapour drop) and other similar stratospheric water vapour drops by means of various simulations with the state-of-the-art Chemistry-Climate Model (CCM) EMAC (ECHAM/MESSy Atmospheric Chemistry Model). The CCM ...

Calvo, N., Garcia, R. R., Randel, W. J., and Marsh, D. R.: Dynamical mechanism for the increase in tropical upwelling in the lowermost tropical stratosphere during warm ENSO events, J. Atmos. Sci., 67, 2331–2340, 2010.; Deckert, R. and Dameris, M.: Higher tropical SSTs strengthen the tropical upwelling via deep convection, Geophys. Res. Lett., 35, L10813, doi:10.1029/2008GL033719, 2008.; Eichinger, R., Jöckel, P., and Lo...

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Nitrogen Oxides Measurements in an Amazon Site and Enhancements As...

By: P. Artaxo; A. M. Cordova; M. A. F. Silva Dias; E. D. Freitas; A. Procópio; L. V. Gatti; S. Freitas; K. Longo

Description: Instituto de Pesquisas Energéticas e Nucleares (IPEN), São Paulo, Brazil. An intensive atmospheric chemistry study was carried out in a pristine Amazonian forest site (Balbina), Amazonas state, Brazil during the 2001 wet season, as part of the LBA/CLAIRE 2001 (The Large Scale Biosphere Atmosphere Experiment in Amazonia/Cooperative LBA Airborne Regional Experiment) field campaign. Measurements of nitrogen oxide (NO), nitrogen dioxide (NO2) and ...

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X-ray Computed Microtomography of Sea Ice – Comment on a Review of...

By: R. W. Obbard

Description: Thayer School of Engineering at Dartmouth College, 14 Engineering Drive, Hanover, New Hampshire 03755, USA. This comment addresses a statement made in A review of air–ice chemical and physical interactions (AICI): liquids, quasi-liquids, and solids in snow by Bartels-Rausch et al. (Atmos. Chem. Phys., 14, 1587–1633, doi:10.5194/acp-14-1587-2014, 2014). Here we rebut the assertion that X-...

Bartels-Rausch, T., Jacobi, H.-W., Kahan, T. F., Thomas, J. L., Thomson, E. S., Abbatt, J. P. D., Ammann, M., Blackford, J. R., Bluhm, H., Boxe, C., Domine, F., Frey, M. M., Gladich, I., Guzmán, M. I., Heger, D., Huthwelker, Th., Klán, P., Kuhs, W. F., Kuo, M. H., Maus, S., Moussa, S. G., McNeill, V. F., Newberg, J. T., Pettersson, J. B. C., Roeselová, M., and Sodeau, J. R.: A review of air-ice chemical and physical interactions (AICI): liquids, quasi-liquids, and solids...

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Characteristics of Atmospheric Ammonia Over Beijing, China : Volum...

By: P. Yan; X. M. Jiang; W. L. Lin; Y. M. Zhang; Z. Y. Meng; Y. Wang; X. L. Yu; X. F. Jia

Description: Key Laboratory for Atmospheric Chemistry of CMA, Center for Atmospheric Watch and Services of CMA, Chinese Academy of Meteorological Sciences, Beijing, China. Continuous measurements of atmospheric ammonia (NH3) were conducted using Ogawa passive samplers from February 2008 to July 2010 at an urban site and from January 2007 to July 2010 at a rural site in Beijing, China. NH4+ in fine particles was also collected at rural ...

Alebic-Juretic, A.: Airborne ammonia and ammonium within the Northern Adriatic area, Croatia, Environ. Pollut., 154, 439–447, 2008.; Aneja, V. P., Chauhan, J. P., and Walker, J. T.: Characterization of Atmospheric Ammonia Emissions from Swine Waste Storage and Treatment Lagoons, J. Geophys. Res., 105, 11535–11545, 2000.; Asman, W. A., Sutton, M. A., and Schjørring, J. K.: Ammonia: Emission, atmospheric transport and deposition, New Phytol., 139, 27–48, 1998.; Bari, A., F...

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Validation of Hno3, Clono2, and N2O5 from the Atmospheric Chemistr...

By: K. Strong; M. De Mazière; R. Ruhnke; K. A. Walker; T. Kerzenmacher; E. Dupuy; N. Glatthor; M. Coffey; D. Smale; T. Von Clarmann; C. Tétard; A. Kagawa; H. Küllmann; P. Raspollini; P. Duchatelet; G. Manney; P. F. Bernath; C. D. Boone; N. Jones; M. Toohey; S. Brohede; E. Mahieu; Y. Kasai; D. W. T. Griffith; M. A. Wolff; K. Jucks; D. Murtagh; J. Urban; F. Hase; Y. Mébarki; M. Höpfner; C. Piccolo; I. Kramer; C. McLinden; V. Catoire; W. H. Daffer; S. Mikuteit; C. Senten; M. Ridolfi; S. Wood; J. Kuttippurath; J. Hannigan; N. Huret; M. Santee

Description: Department of Physics, University of Toronto, Toronto, Ontario, Canada. The Atmospheric Chemistry Experiment (ACE) satellite was launched on 12 August 2003. Its two instruments measure vertical profiles of over 30 atmospheric trace gases by analyzing solar occultation spectra in the ultraviolet/visible and infrared wavelength regions. The reservoir gases HNO3, ClONO2, and N2O5 are three of the key species provid...

Abrams, M C., Chang, A Y., Gunson, M R., Abbas, M M., Goldman, A., Irion, F W., Michelsen, H A., Newchurch, M J., Rinsland, C P., Stiller, G P., and Zander, R.: On the assessment and uncertainty of atmospheric trace gas burden measurements with high resolution infrared solar occultation spectra from space by the ATMOS experiment, Geophys. Res. Lett., 23, 2337–2340, \doi10.1029/96GL01794, 1996.; Barret, B., Ricaud, P., Santee, M L., Attié, J.-L., Urban, J., Flochmo\en, E ...

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Organosulfates and Organic Acids in Arctic Aerosols: Speciation, A...

By: J. K. Nøjgaard; Q. T. Nguyen; A. Zare; P. Tunved; R. Krejci; M. Glasius; F. Cozzi; J. Ström; K. Kristensen; H. Skov; A. M. K. Hansen; J. H. Christensen; J. Brandt

Description: Department of Chemistry and iNANO, Aarhus University, Aarhus, Denmark. Sources, composition and occurrence of secondary organic aerosols (SOA) in the Arctic were investigated at Zeppelin Mountain, Svalbard, and Station Nord, northeast Greenland, during the full annual cycle of 2008 and 2010 respectively. We focused on the speciation of three types of SOA tracers: organic acids, organosulfates and nitrooxy organosulfates from both anthropogenic an...

ACIA: Arctic Climate Impact Assessment, Overview Report, Cambridge Univ. Press, Cambridge, 140 pp., 2004.; Albrecht, B. A.: Aerosols, cloud microphysics, and fractional cloudiness, Science, 245, 1227–1230, doi:10.1126/science.245.4923.1227, 1989.; Austin, J. F.: The Blocking of middle latitude westerly winds by planetary-waves, Q. J. Roy. Meteor. Soc., 106, 327–350,

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Revisiting Twomey's Approximation for Peak Supersaturation : Volum...

By: B. J. Shipway

Description: Met Office, Exeter, UK. Twomey's seminal 1959 paper provided lower and upper bound approximations to the estimation of peak supersaturation within an updraft and thus provides the first closed expression for the number of nucleated cloud droplets. The form of this approximation is simple, but provides a surprisingly good estimate and has subsequently been employed in more sophisticated treatments of nucleation parametrization. In the ...

Abramowitz, M. and Stegun, I. A.: Handbook of Mathematical Functions, Dover, 1964.; Abdul-Razzak, H. and Ghan, S. J.: A parameterization of aerosol activation 2. Multiple aerosol types, J. Geophys. Res., 105, 6837–6844, doi:10.1029/1999JD901161, 2000.; Ackerman, A. S., Kirkpatrick, M. P., Stevens, D. E., and Toon, O. B.: The impact of humidity above stratiform clouds on indirect aerosol climate forcing, Nature, 432, 1014...

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Characterization of Gas Station Emissions During the Carebeijing 2...

By: M. Shao; M. Hu; M. Wang; R. Zhang; C.-c. Chang; T. Zhu; J. Zheng

Description: Department of Atmospheric Sciences, Texas A&M University, Texas 77843, USA. A proton transfer-reaction mass spectrometer (PTR-MS) onboard a mobile laboratory was used to conduct emission measurements at eight gas stations in Beijing during the CAREBeijing 2008 campaign. Benzene, toluene, C8-, C9-aromatics, methanol, MTBE, butenes and pentenes were the major volatile organic compounds (VOCs) detected during the measur...

Arnold, S. T., Viggiano, A. A., and Morris, R. A.: Rate constants and product branching fractions for the reactions of \chem{H3O^+} and \chem{NO^+} with \chem{C_2}-\chem{C_12} alkanes, J. Phys. Chem. A, 102, 8881–8887, 1998.; Atkinson, R. and Arey, J.: Atmospheric degradation of volatile organic compounds, Chem. Rev., 103, 4605–4638, doi:10.1021/cr0206420, 2003.; Chang, C. C., OuYang, C. F., Wang, C. H., Chiang, S. W., and ...

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Enso Surface Shortwave Radiation Forcing Over the Tropical Pacific...

By: N. Hatzianastassiou; C. Matsoukas; A. Fotiadi; K. G. Pavlakis; I. Vardavas

Description: Foundation for Research and Technology-Hellas, Heraklion, Crete, Greece. We have studied the spatial and temporal variation of the downward shortwave radiation (DSR) at the surface of the Earth during ENSO events for a 21-year period over the tropical and subtropical Pacific Ocean (40° S–40° N, 90° E–75° W). The fluxes were computed using a deterministic model for atmospheric radiation transfer, along with satellite data from the ISCCP-D2 database, rean...

Kistler, R., Kalnay, E., Collins, W., Saha, S., White, G., Woollen, J., Chelliah, M., Ebisuzaki, W., Kanamitsu, M., Kousky, V., van den Dool, H., Jenne, R., and Fiorino, M.: The NCEP-NCAR 50-Year Reanalysis: Monthly Means CD ROM and Documentation, Bulletin of the American Meteorological Society, 82, 247–268, 2001.; Koepke, P., Hess, M., Schult, I., and Shettle, E. P.: Global aerosol data set, Rep. No. 243, Max-Planck Institut für Meteorologie, 44 pp., Hamburg, Germany, 1...

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Quantification of Hydroxyacetone and Glycolaldehyde Using Chemical...

By: M. R. Beaver; J. M. St. Clair; J. D. Crounse; K. M. Spencer; P. O. Wennberg; F. Paulot

Description: Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA, USA. Chemical ionization mass spectrometry (CIMS) enables online, fast, in situ detection and quantification of hydroxyacetone and glycolaldehyde. Two different CIMS approaches are demonstrated employing the strengths of single quadrupole mass spectrometry and triple quadrupole (tandem) mass spectrometry. Both methods are capable of the measurement of hydrox...

Amelynck, C., Schoon, N., and Arijs, E.: Gas phase reactions of \chem{CF_3O^- and  CF_3O^-\cdot  H_2O} with nitric, formic, and acetic acid, International J. Mass Spectrom., 203, 165–175, 2000.; Amelynck, C., Van Bavel, A. M., Schoon, N., and Arijs, E.: Gas phase reactions of \chem{CF_3O^-} and \chem{CF_3O^-\cdot  H_2O}  and their relevance to the detection of stratospheric HCl, International J. Mass Spectrom., 202, 207–216, 2000.; Atkinson, R. and Arey, J.: Gas-phase tr...

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Chemical Ozone Loss in the Arctic Winter 2002/2003 Determined with...

By: R. Lehmann; J. Davies; M. Rex; P. Von Der Gathen; M. Gerding; H. De Backer; G. O. Braathen; E. Reimer; M. Allaart; H. Dier; P. Skrivankova; V. Dorokov; S. B. Andersen; P. Viatte; T. Nagai; H. Deckelmann; C. Parrondo; D. Moore; R. Stübi; N. R. P. Harris; H. Nakane; E. Moran; G. Vaughan; E. Kyrö; H. Claude; G. Millard; Z. Litynska; V. Yushkov; M. Streibel; M. Chipperfield; H. Fast

Description: Alfred Wegener Institute for Polar and Marine Research, Research Department Potsdam, P.O. Box 600149, 14401 Potsdam, Germany. The Match technique was used to determine chemically induced ozone loss inside the stratospheric vortex during the Arctic winter 2002/2003. From end of November 2002, which is the earliest start of a Match campaign ever, until end of March 2003 approximately 800 ozonesondes were launched from 34 stations in the Arctic and mid lati...

Becker, G., Müller, R., McKenna, D. S., Rex, M., and Carslaw, K. S.: Ozone loss rates in the Arctic stratosphere in the winter 1991/92: Modell calculations compared with Match results, Geophys. Res. Lett., 25, 4325–4328, doi:10.1029/1998GL900148, 1998.; Canty, T., Rivire, E. D., Salawitch, R. J., Berthet, G., Renard, J.-B., Pfeilsticker, K., Dorf, M., Butz, A., Bösch, H., Stimpfle, R. M., Wilmouth, D. M., Richard, E. C., Fahey, D. W., Popp, P. J., Schoeberl, M., Lait, L....

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Dependence of Cloud Fraction and Cloud Top Height on Surface Tempe...

By: T. Deutschmann; S. Beirle; M. Grzegorski; T. Wagner; U. Platt

Description: MPI for Chemistry, Mainz, Germany. Cloud climate feedback constitutes the most important uncertainty in climate modelling, and currently even its sign is still unknown. In the recently published report of the intergovernmental panel on climate change (IPCC), from 20 climate models 6 showed a positive and 14 a negative cloud radiative feedback in a doubled CO2 scenario. The radiative budget of clouds has also been investigated by experimental ...

Bergman, J. W. and Salby, M. L.: Diurnal variations of cloud cover and their relationship to climatological conditions, J. Climate, 9, 2802–2820, 1996.; Bony, S., Lau, K.-M., and Sud, Y. C.: Sea surface temperature and large-scale circulation influences on tropical greenhouse effect and cloud radiative forcing, J. Climate, 2055–2077, 1997a.; Bony, S., Sud, Y., Lau, K.-M., Susskind, J., and Saha, S.: Comparison and assessment of NASA/DAO and NCEP-NCAR reanalyses over trop...

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Different Characteristics of Char and Soot in the Atmosphere and T...

By: S. C. Lee; J. J. Cao; K. F. Ho; Z. S. an; Y. M. Han

Description: SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China. Elemental carbon (EC) is a collective term encompassing all thermally altered carbonaceous materials and can be subdivided into two classes: char and soot. Since the different classes of EC have different chemical and physical properties, their optical light-absorbing properties differ, so that it is essential to differentiate them in the environment. One year of o...

Armails, S.: Wet deposition of elemental carbon in Lithuania, Sci. Total Environ., 239, 89–93, 1999.; Andreae, M. O. and Gelencsér, A.: Black carbon or brown carbon? The nature of light-absorbing carbonaceous aerosols, Atmos. Chem. Phys., 6, 3131–3148, 2006.; Avakian, M. D., Dellinger, B., Fiedler, H., Gullet, B., Koshland, C., Marklund, S., Oberdorster, G., Safe, S., Sarofim, A., Smith, K. R., Schwartz, D., and Suk, W. A.: The origin, fate, and health effects of combust...

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Humidity-dependent Phase State of Soa Particles from Biogenic and ...

By: P. Massoli; A. T. Lambe; J. P. Koop, T.; Virtanen; D. A. Croasdale; A. Worsnop; P. Laaksonen; E. Saukko; D. R. Davidovits; D. R. Wright; T. B. Pedernera; A. Onasch

Description: Department of Physics, Tampere University of Technology, Tampere, Finland. The physical phase state (solid, semi-solid, or liquid) of secondary organic aerosol (SOA) particles has important implications for a number of atmospheric processes. We report the phase state of SOA particles spanning a wide range of oxygen to carbon ratios (O/C), used here as a surrogate for SOA oxidation level, produced in a flow tube reactor by photo-oxidation of various atmo...

Aiken, A. C., DeCarlo, P. F., Kroll, J. H., Worsnop, D. R., Huffman, J. A., Docherty, K. S., Ulbrich, I. M., Mohr, C., Kimmel, J. R., Sueper, D., Sun, Y., Zhang, Q., Trimborn, A., Northway, M., Ziemann, P. J., Canagaratna, M. R., Onasch, T. B., Alfarra, M. R., Prevot, A. S. H., Dommen, J., Duplissy, J., Metzger, A., Baltensperger, U., and Jimenez, J. L.: O/C and OM/OC Ratios of Primary, Secondary, and Ambient Organic Aerosols with High-Resolution Time-of-Flight Aerosol M...

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