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Investigating the Sensitivity of High-resolution Mesoscale Models ...

By: F. S. Marzano; L. Molini; K. De Sanctis; A. Parodi; R. Ferretti; M. Montopoli; F. Siccardi

Description: CETEMPS – Department of Physics, University of L'Aquila, L'Aquila, Italy. An improved methodology for investigating mesoscale model microphysics is presented and discussed for a case study. Polarimetric radar data are used to assess numerical weather prediction (NWP) model's skill in reproducing the microphysical features of severe rainfall. To this aim, an event of deep convection, developed on 20 May 2003 in the Po Valley (Italy), is analyz...

Alberoni, P. P., Andersson, T., Mezzasalma, P., Michelson, D. B., and Nanni, S.: Use of the vertical reflectivity profile for identification of anomalous propagation, Meteorol. Appl., 8, 257–266, 2001.; Bernardo, J. M. and Smith, A. F. M.: Bayesian Theory, John Wiley & Sons Ltd, New York 608 pp., 1994.; Blossey, P. N., Bretherton, C. S., Cetrone, J., and Khairoutdinov, M.: Cloud-resolving model simulations of KWAJEX: Model sensitivities and comparisons with satellite and...

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Uncertainties in Future Climate Predictions Due to Convection Para...

By: H. Tost; H. Rybka

Description: Institute for Atmospheric Physics, University of Mainz, Mainz, Germany. In the last decades several convection parameterisations have been developed to consider the impact of small-scale unresolved processes in Earth System Models associated with convective clouds. Global model simulations, which have been performed under current climate conditions with different convection schemes, significantly differ among each other in the simulated transport of tra...

Barker, H. W. and Raisanen, P.: Radiative sensitivities for cloud structural properties that are unresolved by conventional GCMs, Q. J. Roy. Meteorol. Soc., 131, 3103–3122, doi:10.1256/qj.04.174, 2005.; Allen, D. J., Rood, R. B., Thompson, A. M., and Hudson, R. D.: Three-dimensional radon 222 calculations using assimilated meteorological data and a convective mixing algorithm, J. Geophys. Res.-Atmos., 101, 6871–6881,

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On the Relationship Between Acetone and Carbon Monoxide in Differe...

By: F. Arnold; J. De Gouw; C Warneke; J. Williams; H. Fischer; M. De Reus; R. Holzinger

Description: Max Planck Institute for Chemistry, Airchemistry Department, Mainz, Germany. Carbon monoxide and acetone measurements are presented for five aircraft measurement campaigns at mid-latitudes, polar and tropical regions in the northern hemisphere. Throughout all campaigns, free tropospheric air masses, which were influenced by anthropogenic emissions, showed a similar linear relation between acetone and CO, with a slope of 21-25 pptv ...

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Characterization of Primary and Secondary Wood Combustion Products...

By: J. Orasche; Y. Huang; M. Krapf; L. Drinovec; A. S. H. Prévôt; U. Baltensperger; G. Močnik; R. Zimmermann; J. G. Slowik; E. A. Bruns; J. Dommen; I. El-haddad

Description: Laboratory of Atmospheric Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland. Residential wood burning contributes to the total atmospheric aerosol burden; however, large uncertainties remain in the magnitude and characteristics of wood burning products. Primary emissions are influenced by a variety of parameters, including appliance type, burner wood load and wood type. In addition to directly emitted particles, previous laboratory studies ...

Grieshop, A. P., Donahue, N. M., and Robinson, A. L.: Laboratory investigation of photochemical oxidation of organic aerosol from wood fires 2: analysis of aerosol mass spectrometer data, Atmos. Chem. Phys., 9, 2227–2240, doi:10.5194/acp-9-2227-2009, 2009a.; Grieshop, A. P., Logue, J. M., Donahue, N. M., and Robinson, A. L.: Laboratory investigation of photochemical oxidation of organic aerosol from wood fires 1: meas...

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Boundary Layer New Particle Formation Over East Antarctic Sea Ice...

By: M. Keywood; C. M. Gionfriddo; R. Schofield; J. Ward; A. J. Thomas; P. V. Johnston; N. R. P. Harris; A. Klekociuk; S. B. Molloy; K. Kreher; I. E. Galbally; S. R. Wilson; R. S. Humphries; A. D. Robinson; M. Tate; R. Johnson; J. R. Pierce; D. Krabbenhoft

Description: Centre for Atmospheric Chemistry, University of Wollongong, Wollongong, Australia. Aerosol observations above the Southern Ocean and Antarctic sea ice are scarce. Measurements of aerosols and atmospheric composition were made in East Antarctic pack ice on-board the Australian icebreaker Aurora Australis during the spring of 2012. One particle formation event was observed during the 32 days of observations. This event occurred on the only day...

Adams, P. J. and Seinfeld, J. H.: Predicting global aerosol size distributions in general circulation models, J. Geophys. Res., 107, 4370, doi:10.1029/2001JD001010, 2002.; Ariya, P. A., Khalizov, A., and Gidas, A.: Reactions of gaseous mercury with atomic and molecular halogens: kinetics, product studies, and atmospheric implications, J. Phys. Chem.-US A, 106, 7310–7320, doi:10...

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