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Comment on “improving the Seasonal Cycle and Interannual Variation...

By: E. Stocker; Y. Ji

Description: School of Computational Sciences, George Mason University, Fairfax, VA 22030-4444, USA. Generoso et al. (2003) suggest a method for improving current inventories of aerosol emission from biomass burning based on the Along Track Scanning Radiometer (ATSR) nighttime hot spot product. In order to show the validity and representative of the nighttime burning product for such applications, Genoroso et al. (2003) compared the ATSR nighttime products to the dai...

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Tethered Balloon Measurements of Biogenic Volatile Organic Compoun...

By: J. P. Greenberg; A. Guenther; P. Calanca; V. Tarvainen; C. Spirig

Description: Swiss Federal Research Station for Agroecology and Agriculture, Zürich, Switzerland. Measurements of biogenic volatile organic compounds (VOCs) were performed at Hyytiälä, a Boreal forest site in Southern Finland as part of the project OSOA (origin and formation of secondary organic aerosol) in August 2001. At this site, frequent formation of new particles has been observed and the role of biogenic VOCs in this process is still unclear. Tethered ...

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Aerosol Composition, Oxidative Properties, and Sources in Beijing:...

By: Q. Q. Wang; C. Chen; W. Du; P. C. Wang; D. S. Ji; P. Q. Fu; T. T. Han; X. J. Zhao; L. B. Zhou; D. R. Worsnop; W. Q. Xu; Z. F. Wang; Y. L. Sun

Description: State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China. The mitigation of air pollution in megacities remains a great challenge because of the complex sources and formation mechanisms of aerosol particles. The 2014 Asia- Pacific Economic Cooperation (APEC) summit in Beijing serves as a unique experiment to study the impacts of emission controls on...

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, 2007.; Aiken, A. C., Salcedo, D., Cubison, M. J., Huffman, J. A., DeCarlo, P. F., Ulbrich, I. M., Docherty, K. S., Sueper, D., Kimmel, J. R., Worsnop, D. R., Trimborn, A., Northway, M., Stone, E. A., Schauer, J. J., Volkamer, R. M., Fortner, E., de Foy, B., Wang, J., Laskin, A., Shutthanandan, V., ...

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Accounting for Local Meteorological Effects in the Ozone Time-seri...

By: A. Yu. Karpetchko; O. A. Tarasova

Description: Atmosphere Physics Department, Faculty of Physics, Moscow State University, Moscow, Russia. The relationship between local meteorological conditions and the surface ozone variability was studied by means of statistical modeling, using ozone and meteorological parameters measured at Lovozero (250 m a.s.l., 68.5°N, 35.0°E, Kola Peninsula) for the period of 1999-2000. The regression model of daily mean ozone concentrations on such meteorological par...

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Spatial Regression Analysis on 32 Years Total Column Ozone Data : ...

By: R. J. Van Der A; A. T. J. De Laat; J. S. Knibbe

Description: Royal Netherlands Meteorological Institute, De Bilt, the Netherlands. Multiple-regressions analysis have been performed on 32 years of total ozone column data that was spatially gridded with a 1° × 1.5° resolution. The total ozone data consists of the MSR (Multi Sensor Reanalysis; 1979–2008) and two years of assimilated SCIAMACHY ozone data (2009–2010). The two-dimensionality in this data-set allows us to perform the regressions locally and inves...

Allaart, M. A. F., Kelder, H., and Heijboer, L. C.: On the relation between ozone and potential vorticity, Geophys. Res. Lett., 20, 811–814, 1993.; Baldwin, M. P., Gray, L. J., Dunkerton, T. J., Hamilton, K., Haynes, P. H., Randel, W. J., Holton, J. R., Alexander, M. J., Hirota, I., Horinouchi, T., Jones, D. B. A., Kinnersley, J. S., Marquardt, C., Sato, K., and Takahashi, M. G. L.: The quasi-biennial oscillation, Rev. Geophys., 39, 179–229, 2001.; Bodeker, G. E., Boyd, ...

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Validation of Omi Total Ozone Retrievals from the Sao Ozone Profil...

By: J. H. Kim; X. Liu; K. Chance; J. Bak; D. P. Haffner

Description: Pusan National University, Busan, Korea. The accuracy of total ozone computed from the Smithsonian Astrophysical Observatory (SAO) optimal estimation (OE) ozone profile algorithm (SOE) applied to the Ozone Monitoring Instrument (OMI) is assessed through comparisons with ground-based Brewer spectrometer measurements from 2005 to 2008. We also make comparisons with the three OMI operational ozone products, derived from the NASA Total Oz...

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.; Antón, M. and Loyola, D.: Influence of cloud properties on satellite total ozone observations, J. Geophys. Res., 116, D03208, doi:10.1029/2010JD014780, 2011...

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Ccn Activity and Droplet Growth Kinetics of Fresh and Aged Monoter...

By: A. Asa-awuku; S. N. Pandis; A. Nenes; G. J. Engelhart

Description: Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, USA. The ability of secondary organic aerosol (SOA) produced from the ozonolysis of α-pinene and monoterpene mixtures (α-pinene, β-pinene, limonene and 3-carene) to become cloud droplets was investigated. A static CCN counter and a Scanning Mobility CCN Analyser (a Scanning Mobility Particle Sizer coupled with a Continuous Flow counter) were used for the CCN measur...

Asa-Awuku, A., Nenes, A., Gao, S., Flagan, R. C., and Seinfeld, J. H.: Alkene ozonolysis SOA: inferences of composition and droplet growth kinetics from Köhler theory analysis, Atmos. Chem. Phys. Discuss., 7, 8983–9011, 2007a.; Asa-Awuku, A., Sullivan, A. P., Hennigan, C. J., Weber, R. J., and Nenes, A.: Investigation of molar volume and surfactant characteristics of water-soluble organic compounds in biomass burning aerosol, Atmos. Chem. Phys., 8, 799–812, 2008.; Asa-Aw...

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Particle Hygroscopicity and Its Link to Chemical Composition in th...

By: Z. J. Wu; Y. S. Wu; A. Wiedensohler; M. Hu; J. Zheng; Z. F. Du; D. J. Shang; L. M. Zeng

Description: State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China. Simultaneous measurements of particle number size distribution, particle hygroscopic properties, and size-resolved chemical composition were made during the summer of 2014 in Beijing, China. During the measurement period, the median hygroscopicity parameters (κ) of 50, 100, 150, 2...

Medina, J., Nenes, A., Sotiropoulou, R.-E. P., Cottrell, L. D., Ziemba, L. D., Beckman, P. J., and Griffin, R. J.: Cloud condensation nuclei closure during the International Consortium for Atmospheric Research on Transport and Transformation 2004 campaign: effects of size-resolved composition, J. Geophys. Res., 112, D10S31, doi:10.1029/2006jd007588, 2007.; Mei, F., Hayes, P. L., Ortega, A., Taylor, J. W., Allan, J. D., G...

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On the Hiatus in the Acceleration of Tropical Upwelling Since the ...

By: M. Weber; J. P. Burrows; C. Gebhardt; A. Rozanov; J. Aschmann; A. M. Thompson; R. Hommel

Description: Institute of Environmental Physics, University of Bremen, Bremen, Germany. Chemistry–climate models predict an acceleration of the upwelling branch of the Brewer–Dobson circulation as a consequence of increasing global surface temperatures, resulting from elevated levels of atmospheric greenhouse gases. The observed decrease of ozone in the tropical lower stratosphere during the last decades of the 20th century is consistent with the anticipated ac...

Aschmann, J. and Sinnhuber, B.-M.: Contribution of very short-lived substances to stratospheric bromine loading: uncertainties and constraints, Atmos. Chem. Phys., 13, 1203–1219, doi:10.5194/acp-13-1203-2013, 2013.; Aschmann, J., Sinnhuber, B.-M., Atlas, E. L., and Schauffler, S. M.: Modeling the transport of very short-lived substances into the tropical upper troposphere and lower stratosphere, Atmos. Chem. Phys., 9...

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Composition of Cirrus-forming Aerosols at the Tropical Tropopause ...

By: D. Baumgardner; P. Lawson; D. M. Murphy; K. D. Froyd; R. L. Herman

Description: NOAA Earth System Research Laboratory, Chemical Sciences Division, Boulder, CO, USA. The composition of residual particles from evaporated cirrus ice crystals near the tropical tropopause as well as unfrozen aerosols were measured with a single particle mass spectrometer. Subvisible cirrus residuals were predominantly composed of internal mixtures of neutralized sulfate with organic material and were chemically indistinguishable from unfrozen sulfate-or...

Abbatt, J. P. D., Benz, S., Cziczo, D. J., Kanji, Z., Lohmann, U., and Mohler, O.: Solid ammonium sulfate aerosols as ice nuclei: A pathway for cirrus cloud formation, Science, 313, 1770–1773, 2006.; Alcala, C. M. and Dessler, A. E.: Observations of deep convection in the tropics using the Tropical Rainfall Measuring Mission (TRMM) precipitation radar, J. Geophys. Res.-Atmos., 107, 4792, doi:10.1029/2002JD002457, 2002.; Archuleta, C. M., DeMott, P. J., and Kreidenweis, S...

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The Impact of Biogenic Carbon Emissions on Aerosol Absorption in M...

By: M. J. Tackett; N. Martinez; N. C. Sturchio; J. S. Gaffney; K. Steelman; T. Guilderson; L. Heraty; N. A. Marley; A. MacMillan; K. D. Hardy; A. MacHany-rivera

Description: Graduate Institute of Technology, University of Arkansas at Little Rock, Little Rock, AR, USA. In order to determine the wavelength dependence of atmospheric aerosol absorption in the Mexico City area, the absorption Ångstrom exponents (AAEs) were calculated from aerosol absorption measurements at seven wavelengths obtained with a seven-channel aethalometer during two field campaigns, the Mexico City Metropolitan Area study in April 2003 (MCMA 2003) and...

Allen, D.: Gulf Coast Aerosol Research and Characterization Program (Houston Supersite). Progress Report, August 2001, Environmental Protection Agency Technology Transfer Network Ambient Monitoring Technology Information Center, Houston Supersite Project Information, http://www.epa.gov/ttnamti1/houprog.html, 2001.; Arnott, W. P., Hamasha, K., Moosmuller, H., Sheridan, P. J., and Ogren, J. A.: Towards Aerosol Light-Absorption Measurements with a 7-Wavelength Aethalometer:...

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An Asian Emission Inventory of Anthropogenic Emission Sources for ...

By: H. Akimoto; T. Hayasaka; N. Horii; J. Kurokawa; X. Yan; K. Yamaji; T. Ohara

Description: National Institute for Environmental Studies, Tsukuba, Ibaraki, Japan. We developed a new emission inventory for Asia (Regional Emission inventory in ASia (REAS) Version 1.1) for the period 1980–2020. REAS is the first inventory to integrate historical, present, and future emissions in Asia on the basis of a consistent methodology. We present here emissions in 2000, historical emissions for 1980–2003, and projected emissions for 2010 and 2020 of SO...

Akimoto, H. and Narita, H.: Distribution of SO2, NOx, and CO2 emissions from fuel combustion and industrial activities in Asia with 1°×1° resolution, Atmos. Environ., 28, 213–225, 1994.; Akimoto, H.: Global air quality and pollution, Science, 302, 1716–1719, 2003.; Akimoto, H. and Ohara, T.: Asian Inventories, in: Emissions of Atmospheric Trace Compounds, edited by: Granier, C., Artaxo, P., Reeves, C. E., Kluwer Academic Publishers, Dordr...

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Evolution of Aerosol Optical Thickness Over Europe During the Augu...

By: A. Hodzic; J. L. Deuzé; H. Chepfer; P. Goloub; R. Vautard; P. Couvert; P. Chazette; L. Menut; A. Apituley

Description: Laboratoire de Météorologie Dynamique, Institut Pierre-Simon Laplace, Palaiseau, France. This study describes the atmospheric aerosol load encountered during the large-scale pollution episode that occurred in August 2003, by means of the aerosol optical thicknesses (AOTs) measured at 865 nm by the Polarization and Directionality of the Earth's Reflectances (POLDER) sensor and the simulation by the CHIMERE chemistry-transport model. During this period man...

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Montreal Protocol Benefits Simulated with Ccm Socol : Volume 12, I...

By: J. Gröbner; E. Rozanov; W. Schmutz; T. Egorova; M. Hauser

Description: PMOD/WRC, Davos, Switzerland. Ozone depletion is caused by the anthropogenic increase of halogen containing species in the atmosphere, which results in the enhancement of the concentration of reactive chlorine and bromine in the stratosphere. To reduce the influence of anthropogenic ozone-depleting substances (ODS), the Montreal Protocol was agreed by Governments in 1987, with several Amendments adopted later. In order to assess the benefits of the Mont...

Den Outer, P. N., Slaper, H., and Tax, R. B.: UV radiation in the Netherlands: Assessing long-term variability and trends in relation to ozone and clouds, J. Geophys. Res.-Atmos., 110, D02203, doi:10.1029/2004JD004824, 2005.; Egorova, T. A., Rozanov, E. V., Schlesinger, M. E., Andronova, N. G., Malyshev, S. L., Karol, I. L., and Zubov, V. A.: Assessment of the effect of the Montreal Protocol on atmospheric ozone, Geophys...

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Aerosol Indirect Forcing in a Global Model with Particle Nucleatio...

By: J. E. Penner; M. Wang

Description: Department of Atmospheric, Oceanic, and Space Sciences, University of Michigan, Ann Arbor, Michigan, USA. The number concentration of cloud condensation nuclei (CCN) formed as a result of anthropogenic emissions is a key uncertainty in the study of aerosol indirect forcing and global climate change. Here, we use a global aerosol model that includes an empirical boundary layer nucleation mechanism, the use of primary-emitted sulfate particles to represent...

Abdul-Razzak, H. and Ghan, S. J.: A parameterization of aerosol activation – 2: Multiple aerosol types, J. Geophys. Res., 105, 6837–6844, 2000.; Abdul-Razzak, H. and Ghan, S. J.: A parameterization of aerosol activation – 3: Sectional representation, J. Geophys. Res., 107, 4026, doi:10.1029/2001JD000483, 2002.; Adams, P. J. and Seinfeld, J. H.: Predicting global aerosol size distributions in general circulation models, J. Geophys. Res., 107, 4370, doi:10.1029/2001JD00101...

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Modeling Sea-salt Aerosol in a Coupled Climate and Sectional Micro...

By: O. B. Toon; T. Fan

Description: Laboratory for Atmospheric and Space Physics, Department of Atmospheric and Oceanic Sciences, University of Colorado, Boulder, USA. Sea-salt aerosol mass, optical depth, and number concentration over the global oceans have significant implications for aerosol direct and indirect climate effects. We modeled sea-salt aerosol in a coupled climate and sectional microphysical model, CAM/CARMA, with aerosol dynamics including sea salt emission,...

Andreas, E. L.: Model estimates of the effects of sea spray on air-sea heat fluxes, Mar. Sci. Inst., Univ. of Conn., Avery Point Groton, 17–28, 1990.; Andreas, E. L.: A new sea spray generation function for wind speeds up to 32 m s−1, J. Phys. Oceanogr., 28, 2175–2184, 1998.; Andreas, E. L., Edson, J. B., Monahan, E. C., Rouault, M. P., and Smith, S. D.: The spray contribution to net evaporation from the sea – a review of recent progress, Bound.-Lay. Meteorol....

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Evaluation of the Smoke Injection Height from Wild-land Fires Usin...

By: M. Sofiev; R. Vankevich; T. Ermakova

Description: Finnish Meteorological Institute, Finland. A new methodology for estimation of the smoke injection height from wild-land fires is suggested and evaluated. It is demonstrated that the approaches developed for estimating the plume rise from stacks can be formally written in terms characterising the wild-land fires: fire energy, size and temperature. However, these semi-empirical methods still perform quite poorly because the physical processes ...

Barry, R. G. and Chorley, R. J.: Atmosphere, Weather and Climate, 7th edn., Routledge,Taylor and Francis Group, London, New York, 1998.; Berlyand, M. E.: Sovremennye problemy atmosferno\u{i diffuzii i zagryazneniya atmosfery}, Gidrometizdat, Leningrad, 1975, (Modern Problems of Admosheric Diffusion and Atmospheric Pollution, in Russian).; Briggs, G. A.: Plume rise, in: US Atomic Energy Commission Critical Review Series T/D 25075, US Atomic Energy Commission, Germantown, ...

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Estimating Collision Efficiencies from Contact Freezing Experiment...

By: U. Lohmann; O. Stetzer; C. Marcolli; B. Nagare

Description: Institute for Atmospheric and Climate Science, ETH, Zurich Switzerland. Interactions of atmospheric aerosols with clouds influence cloud properties and modify the aerosol life cycle. Aerosol particles act as cloud condensation nuclei and ice nucleating particles or become incorporated into cloud droplets by scavenging. For an accurate description of aerosol scavenging and ice nucleation in contact mode, collision efficiency between droplets and aer...

Andronache, C.: Diffusion and electric charge contributions to below-cloud wet removal of atmospheric ultra-fine aerosol particles, J. Aerosol Sci., 35, 1467–1482, doi:10.1016/j.jaerosci.2004.07.005, 2004.; Andronache, C., Grönholm, T., Laakso, L., Phillips, V., and Venäläinen, A.: Scavenging of ultrafine particles by rainfall at a boreal site: observations and model estimations, Atmos. Chem. Phys., 6, 4739–475...

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Results from the University of Toronto Continuous Flow Diffusion C...

By: J. P. D. Abbatt; O. Möhler; Z. A. Kanji; P. J. Demott

Description: University of Toronto, Department of Chemistry, Toronto, ON, Canada. The University of Toronto continuous flow diffusion chamber (UT-CFDC) was used to study heterogeneous ice nucleation at the International Workshop on Comparing Ice Nucleation Measuring Systems (ICIS 2007) which also represented the 4th ice nucleation workshop, on 14–28 September 2007. One goal of the workshop was to inter-compare different ice nucleation measurement techniques using th...

Abbatt, J. P. D., Benz, S., Cziczo, D. J., Kanji, Z., Lohmann, U., and Mohler, O.: Solid ammonium sulfate aerosols as ice nuclei: A pathway for cirrus cloud formation, Science, {313}(5794), 1770–1773, 2006.; Andreae, M. O. and Rosenfeld, D.: Aerosol-cloud-precipitation interactions. Part 1. The nature and sources of cloud-active aerosols, Earth-Sci. Rev., {89}(1–2), 13–41, 2008.; Ansmann, A., Mattis, I., Muller, D., Wandinger, U., Radlach, M., Althausen, D., and Damoah, ...

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Long-term Field Performance of a Tunable Diode Laser Absorption Sp...

By: D. R. Bowling; J. W. C. White; J. B. Miller; B. H. Vaughn; S. M. Schaeffer

Description: Department of Biology, University of Utah, Salt Lake City, UT 84112, USA. Tunable diode laser absorption spectrometry (TDLAS) is gaining in popularity for measuring the mole fraction [CO2] and stable isotopic composition (δ13C) of carbon dioxide (CO2) in air in studies of biosphere-atmosphere gas exchange. Here we present a detailed examination of the performance of a commercially-available TDLAS located in a high-altitud...

Allison, C. E. and Francey, R. J.: Verifying Southern Hemisphere trends in atmospheric carbon dioxide stable isotopes, J. Geophys. Res., 112, D21304, doi:10.1029/2006JD007345, 2007.; Alstad, K. P., Lai, C.-T., Flanagan, L. B., and Ehleringer, J. R.: Environmental controls on the carbon isotope composition of ecosystem-respired CO2 in contrasting forest ecosystems in Canada and the USA, Tree Physiol., 27, 1361–1374, 2007.; Bakwin, P. S., Tans, P. P., White, J. ...

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