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An Estimation of the 18O / 16O Ratio of Ut/Lms Ozone Based on Arte...

By: C. A. M. Brenninkmeijer; S. Gromov

Description: Max Planck Institute for Chemistry, Mainz, Germany. An issue of ozone-driven artefact production of CO in the UT/LMS air analysed in the CARIBIC-1 project is being discussed. By confronting the CO mixing / isotope ratios obtained from different analytical instrumentation, we (1) reject natural/artificial sampling and mixing effects as possible culprits of the problem, (2) ascertain the photochemical nature and quantify the strength of the effect in a ge...

Assonov, S. S. and Brenninkmeijer, C. A. M.: A new method to determine the 17O isotopic abundance in CO2 using oxygen isotope exchange with a solid oxide, Rapid Commun. Mass Spectrom., 15, 2426–2437, doi:10.1002/rcm.529, 2001.; Assonov, S. S. and Brenninkmeijer, C. A. M.: A redetermination of absolute values for 17RVPDB-CO2 and 17RVSMOW, Rapid Commun...

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Photochemical Processing of Aqueous Atmospheric Brown Carbon : Vol...

By: X. Li; J. P. D. Abbatt; A. K. Y. Lee; L. Huang; R. Zhao; F. Yang

Description: Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON, Canada. Atmospheric brown carbon (BrC) is a collective term for light absorbing organic compounds in the atmosphere. While the identification of BrC and its formation mechanisms is currently a central effort in the community, little is known about the atmospheric removal processes of aerosol BrC. As a result, we report on a series of laboratory studies of photochemic...

Alexander, D. T., Crozier, P. A., and Anderson, J. R.: Brown carbon spheres in East Asian outflow and their optical properties, Science, 321, 833–836, 2008.; Aljawhary, D., Lee, A. K. Y., and Abbatt, J. P. D.: High-resolution chemical ionization mass spectrometry (ToF-CIMS): application to study SOA composition and processing, Atmos. Meas. Tech., 6, 3211–3224, doi:10.5194/amt-6-3211-2013, 2013.; Andreae, M. O. and Gel...

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Modeling the Influence of Precursor Volatility and Molecular Struc...

By: N. M. Donahue; P. J. Adams; A. L. Robinson; S. H. Jathar

Description: Center for Atmospheric Particle Studies, Carnegie Mellon University, Pittsburgh PA, USA. We use SOA production data from an ensemble of evaporated fuels to test various SOA formation models. Except for gasoline, traditional SOA models focusing exclusively on volatile species in the fuels under-predict the observed SOA formation. These models can be improved dramatically by accounting for lower volatility species, but at the cost of a large set of free pa...

Pankow, J. F.: An absorption model of gas/particle partitioning of organic compounds in the atmosphere, Atmos. Environ., 28, 185–188, 1994.; Alnajjar, M., Cannela, B., Dettman, H., Fairbridge, C., Franz, J., Gallant, T., Gieleciak, R., Hager, D., Lay, C., Lewis, S., Ratcliff, M., Sluder, S., Storey, J., Yin, H., and Zigler, B.: Chemical and physical properties of the fuels for advanced combustion engines (FACE) research diesel fuels, Coordinating Research Council, 2010.;...

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Density Changes of Aerosol Particles as a Result of Chemical React...

By: P. Davidovits; S. T. Martin; D. R. Worsnop; Y. Rudich; J. T. Jayne; Y. Katrib

Description: Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, UK. This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of multi-layered aerosol particles as they are being altered by heterogeneous chemical reactions. A vaporization-condensation method is used to generate aerosol particles composed of...

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Wave Fluxes of Equatorial Kelvin Waves and Qbo Zonal Wind Forcing ...

By: P. Preusse; M. Ern

Description: Institute of Chemistry and Dynamics of the Geosphere (ICG-1), Forschungszentrum Jülich, Jülich, Germany. The quasi-biennial oscillation (QBO) of the zonal mean zonal wind is a dynamical phenomenon of the tropical middle atmosphere. Influences of the QBO can even be found at mid and high latitudes. It is widely accepted that the phase descent of alternating tropical easterlies and westerlies is driven by atmospheric waves of both global scale (equatorial...

Alexander, M. J. and Rosenlof, K. H.: Gravity-wave forcing in the stratosphere: Observational constraints from the Upper Atmosphere Research Satellite and implications for parameterization in global models, J. Geophys. Res., 108, 4587, doi:10.1029/2003JD003373, 2003.; Alexander, S. P., Tsuda, T., Kawatani, Y., and Takahashi, M.: Global distribution of atmospheric waves in the equatorial upper troposphere and lower stratosphere: COSMIC observations of wave mean flow inter...

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A Novel Downscaling Technique for the Linkage of Global and Region...

By: Y. F. Lam; J. S. Fu

Description: Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN, USA. Recently, downscaling global atmospheric model outputs (GCTM) for the USEPA Community Multiscale Air Quality (CMAQ) Initial (IC) and Boundary Conditions (BC) have become practical because of the rapid growth of computational technologies that allow global simulations to be completed within a reasonable time. The traditional method of generating IC/BC by profil...

Al-Saadi, J., Pierce, B., McQueen, J., Natarajan, M., Kuhl, D., Tang, Y. H., Schaack, T. K., and Grell, G.: Global Forecasting System (GFS) Project: Improving National chemistry forecasting and assimilation capabilities, Applications of Environmental Remote Sensing to Air Quality and Public Health, Potomac, MD, 8–9 May 2007.; Bertschi, I. T., Jaffe, D. A., Jaegle, L., Price, H. U., and Dennison, J. B.: 2002 airborne observations of trans-Pacific transport of ozone, CO, v...

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A Review of the Match Technique as Applied to Aase-2/Easoe and Sol...

By: M. R. Schoeberl; L. R. Lait; B. R. Bojkov; G. A. Morris

Description: Dept. of Physics and Astronomy, Rice University, Houston, TX, USA. We apply the NASA Goddard Trajectory Model with a series of ozonesondes to derive ozone loss rates in the lower stratosphere for the AASE-2/EASOE mission (January–March 1992) and for the SOLVE/THESEO 2000 mission (January–March 2000) in an approach similar to Match. Ozone loss rates are computed by comparing the ozone concentrations provided by ozonesondes launched at the beginning and e...

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Validation of Urban No2 Concentrations and Their Diurnal and Seaso...

By: Y. Rudich; R. Dirksen; M. Trainic; H. J. Eskes; K. F. Boersma; I. Desmedt; D. J. Jacob

Description: Harvard University, School of Engineering and Applied Sciences, 29 Oxford Street, Cambridge, MA 02138, USA. We compare a full-year (2006) record of surface air NO2 concentrations measured in Israeli cities to coinciding retrievals of tropospheric NO2 columns from satellite sensors (SCIAMACHY aboard ENVISAT and OMI aboard Aura). This provides a large statistical data set for validation of NO2 satellite measurements in urba...

Acarreta, J R., de Haan, J F., and Stammes, P.: Cloud pressure retrieval using the O2-O2 absorption band at 477 nm, J. Geophys. Res., 109, D05204, doi:10.1029/2003JD003915, 2004.; Beirle, S., Platt, U., Wenig, M., and Wagner, T.: Weekly cycle of NO2 by GOME measurements: a signature of anthropogenic sources, Atmos. Chem. Phys., 3, 2225–2232, 2003.; Bey, I., Jacob, D. J., Yantosca, R. M., Logan, J. A., Field, B. D., Fiore, A. M., Li, Q., L...

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Investigating Types and Sources of Organic Aerosol in Rocky Mounta...

By: Y. Sun; J. L. Collett Jr.; B. A. Schichtel; T. Lee; M. I. Schurman; S. M. Kreidenweis

Description: Department of Atmospheric Science, Colorado State University, Fort Collins, CO, USA. The environmental impacts of atmospheric particles are highlighted in remote areas where visibility and ecosystem health can be degraded by even relatively low particle concentrations. Submicron particle size, composition, and source apportionment were explored at Rocky Mountain National Park using a High-Resolution Time-of-Flight Aerosol Mass Spectrometer. This su...

Adler, G., Flores, J. M., Abo Riziq, A., Borrmann, S., and Rudich, Y.: Chemical, physical, and optical evolution of biomass burning aerosols: a case study, Atmos. Chem. Phys., 11, 1491–1503, doi:10.5194/acp-11-1491-2011, 2011.; Aiken, A. C., DeCarlo, P. F., and Jimenez, J. L.: Elemental analysis of organic species with electron ionization high-resolution mass spectrometry, Anal. Chem., 79, 8350–8358,

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Isoprene and Monoterpene Measurements in a Secondary Forest in Nor...

By: J. E. Saxton; F. Gogus; S. O. U. Korogone; D. Serça; A. C. Lewis; M. Z. Ozel; Y. Boni; J. H. Kettlewell

Description: University of York, Department of Chemistry, Heslington, York, YO10 5DD, UK. The biogenic volatile organic compound (BVOC) composition of ambient air at a rural field site near Djougou, Benin has been studied as part of the AMMA (African Monsoon Multidisciplinary Analysis) project. Ambient air was sampled during day and night during the period 2 June 2006 to 13 June 2006. Gas samples from within the forest canopy and from branch and cuvette enclosure sy...

Andreae, M. O. and Crutzen, P. J.: Atmospheric aerosols: Biogeochemical sources and role in atmospheric chemistry, Science, 276(5315), 1052–1058, 1997.; Atkinson, R. and Arey, J.: Gas-phase tropospheric chemistry of biogenic volatile organic compounds: a review, Atmos. Environ., 37, S197–S219, 2003.; Cachier, H., Buatmenard, P., Fontugne, M., and Rancher, J.: Source Terms and Source Strengths of the Carbonaceous Aerosol in the Tropics, J. Atmos. Chem., 3(4), 469–489, 198...

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Analyzing Experimental Data and Model Parameters: Implications for...

By: A. G. Carlton; S. H. Chung; K. C. Barsanti

Description: Portland State University, Portland, Oregon, USA. Despite the critical importance for air quality and climate predictions, accurate representation of secondary organic aerosol (SOA) formation remains elusive. An essential addition to the ongoing discussion of improving model predictions is an acknowledgement of the linkages between experimental conditions, parameter optimization and model output, as well as the linkage between empirically-derived...

Aumont, B., Szopa, S., and Madronich, S.: Modelling the evolution of organic carbon during its gas-phase tropospheric oxidation: development of an explicit model based on a self generating approach, Atmos. Chem. Phys., 5, 2497–2517, doi:10.5194/acp-5-2497-2005, 2005. % ### SELF-REFERENCE ###; Barsanti, K. C., Smith, J. N., and Pankow, J. F.: Application of the np plus mP modeling approach for simulating secondary orga...

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Evolution of NoX Emissions in Europe with Focus on Road Transport ...

By: L. Ntziachristos; A. Semb; S. Reis; I. S. A. Isaksen; V. Vestreng; L. Tarrasón

Description: Air Pollution Section, Research Department, Norwegian Meteorological Institute, Oslo, Norway. European emission trends of nitrogen oxides since 1880 and up to present are presented here and are linked to the evolution of road transport emissions. Road transport has been the dominating source of NOx emissions since 1970, and contributes with 40% to the total emissions in 2005. Five trend regimes have been identified between 1880 and 2005. The f...

% vor jede Referenz ACEA: DIESEL: Historical series: 1990–2006 by vehicle category, European Automobile Manufacturers' Association, 2007, data available at: http://www.acea.be, 2008.; % vor jede Referenz AQEG: Trends in Primary Nitrogen Dioxide in the UK, Air Quality Expert Group, Prepared for: Department for Environment, Food and Rural Affairs, Scottish Executive, Welsh Assembly Government, and Department of the Environment in Northern Ireland, London, UK, ISBN 978-0-85...

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Size-resolved Cloud Condensation Nuclei (Ccn) Activity and Closure...

By: Y. J. Li; B. Y. L. Lee; M. C. Yeung; C. K. Chan; J. W. Meng

Description: Division of Environment, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China. The cloud condensation nuclei (CCN) properties of atmospheric aerosols were measured on 1–30 May 2011 at the HKUST (Hong Kong University of Science and Technology) Supersite, a coastal site in Hong Kong. Size-resolved CCN activation curves, the ratio of number concentration of CCN (NCCN) to aerosol concentration (N<...

Alfarra, M. R., Paulsen, D., Gysel, M., Garforth, A. A., Dommen, J., Prévôt, A. S., Worsnop, D. R., Baltensperger, U., and Coe, H.: A mass spectrometric study of secondary organic aerosols formed from the photooxidation of anthropogenic and biogenic precursors in a reaction chamber, Atmos. Chem. Phys., 6, 5279–5293, doi:10.5194/acp-6-5279-2006, 2006.; Andreae, M. O. and Rosenfeld, D.: Aerosol-cloud-precipitation inter...

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Bromine and Iodine Chemistry in a Global Chemistry-climate Model: ...

By: S. Tilmes; D. R. Blake; D. E. Kinnison; A. Saiz-lopez; C. Ordóñez; E. L. Atlas; G. Sousa Santos; G. Brasseur; J.-f. Lamarque

Description: Laboratory for Atmospheric and Climate Science (CIAC), CSIC, Toledo, Spain. The global chemistry-climate model CAM-Chem has been extended to incorporate an expanded bromine and iodine chemistry scheme that includes natural oceanic sources of very short-lived (VSL) halocarbons, gas-phase photochemistry and heterogeneous reactions on aerosols. Ocean emissions of five VSL bromocarbons (CHBr3, CH2Br2, CH2BrCl, CHB...

Atkinson, R., Baulch, D. L., Cox, R. A., Hampson, R. F., Kerr, J. A., Rossi, M. J., and Troe, J.: Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry: Supplement VIII, Halogen Species Evaluation for Atmospheric Chemistry, J. Phys. Chem. Ref. Data, 29, 167, doi:10.1063/1.556058, 2000.; Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson Jr, R. F., Hynes, R. G., Jenkin, M. E., Kerr, J. A., Rossi, M....

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The MacC-II 2007–2008 Reanalysis: Atmospheric Dust Evaluation and ...

By: S. Basart; M. Schulz; A. Benedetti; J. M. Baldasano; C. Camino; A. Berjón; Y. Hernández; E. Cuevas; A. Mortier; M. Gil-ojeda; P. Goloub; E. Terradellas; J. J. Morcrette; B. Marticorena

Description: Izaña Atmospheric Research Center, AEMET, Santa Cruz de Tenerife, Spain. In the present work, atmospheric mineral dust from a MACC-II short reanalysis run for 2 years (2007–2008) has been evaluated over northern Africa and the Middle East using satellite aerosol products (from MISR, MODIS and OMI satellite sensors), ground-based AERONET data, in situ PM10 concentrations from AMMA, and extinction vertical profiles from two ground-based lidars ...

Abbot, D. S. and Halevy, I.: Dust aerosol important for snowball earth deglaciation, J. Climate, 23, 4121–4132, 2010.; Alados-Arboledas, L., Alcantara, A., Olmo, F. J., Martinez-Lozano, J. A., Estelles, V., Cachorro, V., Silva, A. M., Horvath, H., Gangl, M., and Diaz, A.: Aerosol columnar properties retrieved from CIMEL radiometers during VELETA 2002, Atmos. Environ., 42, 2654–2667, 2008.; Alonso-Pérez, S., Cuevas, E., Querol, X., Viana, M., and Guerra, J.: Impact of the...

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Validation of Mipas-envisat No2 Operational Data : Volume 7, Issue...

By: J.-c. Lambert; H. Fischer; B. Funke; F. Goutail; M. Van Roozendael; D. Ionov; M. López-puertas; F. Hendrick; T. Blumenstock; C. Belotti; S. Mikuteit; G. Stiller; C. Piccolo; M. Sinnhuber; N. Huret; G. Zhang; H. Oelhaf; J.-p. Pommereau; G. Wetzel; M. Pirre; M. De Mazière; A. Bazureau; R. Ruhnke; G. Maucher; A. Bracher

Description: Institut für Meteorologie und Klimaforschung (IMK), Forschungszentrum Karlsruhe, Karlsruhe, Germany. The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument was launched aboard the environmental satellite ENVISAT into its sun-synchronous orbit on 1 March 2002. The short-lived species NO2 is one of the key target products of MIPAS that are operationally retrieved from limb emission spectra measured in the stratosphere a...

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(17), 2337–2340, doi:10.1029/96GL01794, 1996.; Amekudzi, L. K., Bracher, A., Meyer, J., Rozanov, A., Bovensmann...

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Global Carbon Monoxide Products from Combined Airs, Tes and Mls Me...

By: Z. Wei; Z. Sun; F. Carminati; R. Yang; W. Lahoz; A. Tangborn; L. El Amraoui; B. Duncan; J. X. Warner; J.-l. Attié

Description: Department of Atmospheric & Oceanic Science, University of Maryland, 3433 Computer & Space Sciences Bldg, College Park, MD, USA. This study tests a novel methodology to add value to satellite data sets. This methodology, data fusion, is similar to data assimilation, except that the background model-based field is replaced by a satellite data set, in this case AIRS (Atmospheric Infrared Sounder) carbon monoxide (CO) measurements. The observational informa...

Aumann, H. H., Chahine, M. T., Gautier, C., Goldberg, M., Kalnay, E., McMillin, L., Revercomb, H., Rosenkranz, P. W., Smith, W. L., Staelin, D., Strow, L., and Susskind, J.: AIRS/AMSU/HSB on the Aqua Mission: Design, Science Objectives, Data Products and Processing Systems, IEEE T. Geosci. Remote, 41, 253–264, 2003.; Beer, R.: TES on the Aura mission: scientific objectives, measurements, and analysis overview, IEEE T. Geosci. Remote, 44, 1102–1105, 2006.; Crutzen, P. J. ...

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Prompt Deliquescence and Efflorescence of Aerosol Nanoparticles : ...

By: L. M. Russell; D. Paulsen; P. R. Buseck; S. T. Martin; G. Biskos

Description: Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. Literature reports have differed on the possibilities of discontinuous and continuous (i.e., prompt and nonprompt) deliquescence and efflorescence of aerosol particles in the nanosize regime. Experiments reported herein using a hygroscopic tandem nano-differential mobility analyzer demonstrate prompt deliquescence and efflorescence of ammonium sulfate particles ha...

Allan, J. D., Alfarra, M. R., Bower, K. N., Coe, H., Jayne, J. T., Worsnop, D. R., Aalto, P. P., Kulmala, M., Hyotylainen, T., Cavalli, F., and Laaksonen, A.: Size and composition measurements of background aerosol and new particle growth in a Finnish forest during QUEST 2 using an Aerodyne Aerosol Mass Spectrometer, Atmos. Chem. Phys., 6, 315–327, 2006.; Ball, S. M., Hanson, D. R., Eisele, F. L., and McMurry, P. H.: Laboratory studies of particle nucleation: Initial res...

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Mechanism Reduction for the Formation of Secondary Organic Aerosol...

By: P. A. Makar; D. V. Michelangeli; A. G. Xia

Description: Department of Earth and Space Science and Engineering, York University, Toronto, Ontario, Canada. A detailed α-pinene oxidation mechanism was reduced systematically through the successive application of five mechanism reduction techniques. The resulting reduced mechanism preserves the ozone- and organic aerosol-forming properties of the original mechanism, while using less species. The methodologies employed included a directed relation graph met...

Whitehouse, L. E., Tomlin, A. S., and Pilling, M. J.: Systematic reduction of complex tropospheric chemical mechanisms, part ii: Lumping using a time-scale based approach, Atmos. Chem. Phys., 4, 2057–2081, 2004a.; Whitehouse, L. E., Tomlin, A. S., and Pilling, M. J.: Systematic reduction of complex tropospheric chemical mechanisms, part i: Sensitivity and time-scale analyses, Atmos. Chem. Phys., 4, 2025–2056, 2004b.; Andersson-Skold, Y. and Simpson, D.: Secondary organic...

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Effects of Total Solar Eclipse of 29 March 2006 on Surface Radiati...

By: S. Kazadzis; B. Schallhart; A. Bais; N. Kouremeti; M. Blumthaler; A. Webb; R. Kift; A. Kazantzidis

Description: Laboratory of Atmospheric Physics, Aristotle University of Thessaloniki, Greece. Solar irradiance spectral measurements were performed during a total solar eclipse. The spectral effect of the limb darkening to the global, direct irradiance and actinic flux measurements was investigated. This effect leads to wavelength dependent changes in the measured solar spectra showing a much more pronounced decrease in the radiation at the lower wavelengths. Radiat...

Bais,~A F., Gardiner,~B G., Slaper,~H., Blumthaler,~M., Bernhard,~G., McKenzie,~R.; Webb,~A R., Seckmeyer,~G., Kjeldstad,~B., Koskela,~T., Kirsch,~P J., Gröbner,~J., Kerr,~J B., Kazadzis,~S., Leszcznski,~K., Wardle,~D., Josefsson,~W., Brogniez,~C., Gillotay,~D., Reinen,~H., Weihs,~P., Svenoe,~T., Eriksen,~P., Kuik,~F., and Redondas A.: SUSPEN intercomparison of ultraviolet spectroradiometers, J. Geophys. Res.-Atmos., 106(D12), 12 509–12 525, 2001.; Beletsky, A. B., Mikha...

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