Marie Monier
Blaise Pascal University
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Featured researches published by Marie Monier.
Atmospheric Research | 2001
Wolfram Wobrock; Andrea I. Flossmann; Marie Monier; Jean-Marc Pichon; Laurent Cortez; Jean-François Fournol; Alfons Schwarzenböck; S. Mertes; Jost Heintzenberg; P. Laj; G. Orsi; L. Ricci; S. Fuzzi; Harry ten Brink; P. Jongejan; R. Otjes
The second field campaign of the Cloud Ice Mountain Experiment (CIME) project took place in February 1998 on the mountain Puy de Dome in the centre of France. The content of residual aerosol particles, of H2O2 and NH3 in cloud droplets was evaluated by evaporating the drops larger than 5 μm in a Counterflow Virtual Impactor (CVI) and by measuring the residual particle concentration and the released gas content. The same trace species were studied behind a round jet impactor for the complementary interstitial aerosol particles smaller than 5 μm diameter. In a second step of experiments, the ambient supercooled cloud was converted to a mixed phase cloud by seeding the cloud with ice particles by the gas release from pressurised gas bottles. A comparison between the physical and chemical characteristics of liquid drops and ice particles allows a study of the fate of the trace constituents during the presence of ice crystals in the cloud. In the present paper, an overview is given of the CIME 98 experiment and the instrumentation deployed. The meteorological situation during the experiment was analysed with the help of a cloud scale model. The microphysics processes and the behaviour of the scavenged aerosol particles before and during seeding are analysed with the detailed microphysical model ExMix. The simulation results agreed well with the observations and confirmed the assumption that the Bergeron–Findeisen process was dominating during seeding and was influencing the partitioning of aerosol particles between drops and ice crystals. The results of the CIME 98 experiment give an insight on microphysical changes, redistribution of aerosol particles and cloud chemistry during the Bergeron–Findeisen process when acting also in natural clouds.
Journal of the Atmospheric Sciences | 2006
Marie Monier; Wolfram Wobrock; Jean-François Gayet; Andrea I. Flossmann
Cirrus clouds play an important role in the earths energy balance. To quantify their impact, information is needed on their microstructure and more precisely on the number and size of the ice crystals. With the anthropogenic activity, more and more aerosol particles and water vapor are released even at the altitude where cirrus clouds are formed. Cirrus clouds formed in a polluted air mass may have different microphysical properties and, therefore, a different impact on the climate system via the changed radiative properties compared to background cirrus clouds. To study this aspect, the European project called the Interhemispheric Differences in Cirrus Properties due to Anthropogenic Emissions (INCA) measured the microphysical properties of cirrus clouds together with the physical and chemicals properties of aerosol particles in clean air (at Punta Arenas, Chile) and polluted air (at Prestwick, Scotland). The goal of the present work was to develop a detailed microphysics model for cirrus clouds for the interpretation and the generalization of the INCA observations. This model considers moist aerosol particles through the Externally Mixed (EXMIX) model, so that the chemical composition of solution droplets can be followed. Ice crystal formation is described through homogeneous or heterogeneous nucleation. The crystals then grow by deposition. With this model, the interactions between the microphysical processes, simulated ice crystal concentrations, and dimensional distributions of the INCA observations were studied, and explanations were provided for the observed differences between background and polluted cirrus clouds.
Archive | 2014
Arnaud Quérel; Pascal Lemaitre; Marie Monier; Emmanuel Porcheron; Andrea I. Flossmann
The understanding and the anticipation of the environmental fallout in case of severe nuclear accidents with radioactive releases is crucial for the environment. In this study we aim to improve our knowledge on the aerosol particles scavenging, in particular the washout by raindrops with a diameter larger than 1 mm.
Volume 5: Fusion Engineering; Student Paper Competition; Design Basis and Beyond Design Basis Events; Simple and Combined Cycles | 2012
Arnaud Quérel; Pascal Lemaitre; Marie Monier; Emmanuel Porcheron; Andrea I. Flossmann
The analysis of the radioactive aerosol scavenging by rain after the Chernobyl accident highlights some differences between the modelling studies and the environmental measurements. Part of this gap is due to the uncertainties on the scavenging efficiency of aerosol particles by raindrops, in particular for drops with a diameter larger than one millimeter. The IRSN (Institut de Radioprotection et de Surete Nucleaire) has decided to launch an experimental study to measure with a better accuracy the scavenging efficiency of large raindrops.The scavenging efficiency of aerosol has been determined by measuring precisely the mass of aerosol particles collected by a single drop after its path through an atmosphere loaded with particles.The collection efficiencies for drop diameters of 2 mm and 2.6 mm (previously unknown for atmospheric aerosols) are measured. The impact of these new data on modeling of the washout of the atmosphere by the rain is noticed.Copyright
Journal of Geophysical Research | 2004
Jean-François Gayet; J. Ovarlez; V. Shcherbakov; Johan Ström; Ulrich Schumann; Andreas Minikin; Frédérique Auriol; Andreas Petzold; Marie Monier
Atmospheric Chemistry and Physics | 2014
Muriel Joly; Pierre Amato; Laurent Deguillaume; Marie Monier; C. Hoose; Anne-Marie Delort
Journal of Geophysical Research | 2003
Klaus M. Gierens; Marie Monier; Jean-François Gayet
Atmospheric Chemistry and Physics | 2011
S. Henning; M. Ziese; Alexei Kiselev; Harald Saathoff; O. Möhler; Thomas F. Mentel; A. Buchholz; C. Spindler; V. Michaud; Marie Monier; K. Sellegri; Frank Stratmann
Atmospheric Research | 2006
Delphine Leroy; Marie Monier; Wolfram Wobrock; Andrea I. Flossmann
Atmospheric Research | 2014
Arnaud Quérel; Marie Monier; Andrea I. Flossmann; Pascal Lemaitre; Emmanuel Porcheron