Seminars
Year 2008
- 3rd March 2008 at 10:00 AM: Arbitrary Moment Internally-Mixed Aerosol Dynamic Equation - Anthony Wexler (University of California)
Abstract: Urban and regional air quality models and General Circulation Models require multiple moments of the aerosol size distribution to predict mass (e.g., health effects, aerosol mass balance), number (e.g., health effects, cloud activation), or intermediate and variable moments (e.g., light scattering and absorption). We will discuss the multi-component general dynamic equations relevant for multi-component internally-mixed number distributions and mass distributions. Then we will derive such equations governing multi-component condensation/evaporation for a general distribution function that may present an arbitrary moment (either integer or non-integer) or an arbitrary combination of such moments. A variant of Bott\u2019s positive definite advection scheme was employed to solve these equations. Several variants of this general distribution function were tested: sum of the mass (3rd moment) and number (0th moment) distributions; an intermediate (1.5th moment) distribution; and the sum of these mass, number and intermediate distributions. These functions were tested using different evolution scenarios (condensation or evaporation) and different size grid resolutions (fine and coarse) predicting both the mass and number distributions simultaneously, as is needed in climate models. Compared to number moment alone, accuracy improves one order of magnitude for fine grid and two orders for coarse grid. Our approach serves essentially the same purpose as the two-moment aerosol sectional (TOMAS) model of Adams and Seinfeld (2002), but involves the solution of half as many equations and storing half the variables.
- 26th March 2008 at 10:00 AM: GeoStockage du Co2 et surveillance de l'environnement - Guillemette Picard (Schlumberger)
- 7th April 2008 at 14:30: An overview of the air quality and emergency modelling system SILAM by Mikhail Sofiev (Finnish Meteorological Institute) and Data assimilation for air quality analysis and forecasting by Julius Vera (Finnish Meteorological Institute)
- 5th May 2008: Role of shallow cumulus on atmospheric boundary layer chemistry - Jordi Vila-Guerau (The Netherlands)
- 5th September 2008 at 10:00 am: In the frame of
STIC/AMSUD France/Chili/Argentine cooperation, four presentations of 20 minutes each
- SAEMC: How far have we reached? What is next? Intervenant : Laura Gallardo Affiliation: Universidad de Chile, Departamento de Geofísica et CMM, Chili.
- Past (1970 -2005) and Prospective (2005 - 2025) Trends of CO2 Emissions from the Argentinean Energy Sector Intervenant : Laura Dawidowski Affiliation: CNEA, Argentine
- Comparison of a static and a dynamic IVE on-road mobile emission inventories for the City of Buenos Aires and the Metropolitan Area Intervenant : Ariela d'Angiola Affiliation: IAI, CNEA, Argentina
- Improving Santiago's CO emissions inventory by means of inverse modeling Intervenant : Pablo Saide Affiliation: Universidad de Chile, DIMEC, CMM, Chile
- 20th November 2008 at 10:00 AM: Development of a numerical simulation system for the study of urban heat island mitigation strategies - Andrea Krpo (Ecole polytechnique fédérale de Lausanne)
- 21th November 2008 at 10:00 AM : Assessment of radioactive contamination
of environment caused by possible accidental releases at nuclear power plants
using radioactivity transport models in atmosphere - Nikolai Talerko (Institute
for Safety Problems of Nuclear Power Plants of National Academy of Sciences of
Ukraine)
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