3nd webinar

Who? Dr. Sylvain Mailler (LMD / École nationale des Ponts et Chaussées) and Dr. Guillaume Siour (LISA / CNRS)

When? 04 September 2024, 16hs UTC (13 hs Argentina)

Where? In person: Sala 2308 – 1er Piso Pabellón 0 + Infinito. Ciudad Universitaria UBA. Ciudad Autónoma de Buenos Aires
Online: https://exactas-uba.zoom.us/j/87285022610 Meeting ID: 872 8502 2610 Passcode: coloquios

Title: Modelling atmospheric pollution: recent advances with the CHIMERE model

CHIMERE is a chemistry-transport model developed from 1997 until now by groups in the area of Paris including LMD, LISA, and, until recently, INERIS. The model is updated regularly, and a new version is released under the free GPL license every 2 or 3 years. It can be used from hemispheric to urban scale to represent anthropogenic, biogenic, and natural species, in both gaseous and condensed phases. CHIMERE is used to perform analyses of air pollution cases, future scenarios, and parameterization developments. It is also used for operational forecasts in France (PREV’AIR), Europe (CAMS), and other countries. Recent advances in the CHIMERE model, which we will discuss, include the addition of new advection schemes, new formulations for pollen emissions, and technical improvements. We will also discuss the status and prospects for using the CHIMERE model in South America.

Guillaume Siour has been a research engineer at CNRS since 2012 and works at LISA on modelling chemical and physical atmospheric processes. His PhD was defended in 2012 under the guidance of Isabelle Coll and Augustin Colette, with studies focused on the modeling and impact assessment of European megacities. His expertise is mainly based on the application and development of the chemistry transport model. He’s been involved in CHIMERE model development since 2013, particularly concerning atmospheric chemistry and emissions processes. From 2024 he is responsible for coordinating the development of the CHIMERE model. He is the author and co-author of over 70 publications.

Sylvain Mailler is a researcher at Laboratoire de Météorologie Dynamique (LMD, Paris / Palaiseau), and staff of École Nationale des Ponts et Chaussées. His PhD was defended in 2010 under the guidance of François Lott, with studies focused on the dynamical influence on the regional climate of major mountain ranges such as the Tibetan Plateau and the Andes. Since 2012, he has been working on the regional climate of the Mediterranean area and the development of the CHIMERE model, including works on the horizontal and vertical model grid, advection schemes, the representation of photolysis, and improvements in the representation of the settling speed of particles. With Laurent Menut, he has supervised the PhD thesis of Rémy Lapere, who applied the CHIMERE model to study atmospheric pollution in Santiago, Chile, and its advection to the Andean cryosphere. He is now coordinating the ChimSur International Research Network with researchers from IFAECI, Instituto Gulich (Córdoba), Universidad de Chile, LMD, and LISA.