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Dive into the research topics where Marie Monier is active.

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Featured researches published by Marie Monier.


Atmospheric Research | 2001

The Cloud Ice Mountain Experiment (CIME) 1998: experiment overview and modelling of the microphysical processes during the seeding by isentropic gas expansion

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

Development of a Detailed Microphysics Cirrus Model Tracking Aerosol Particles’ Histories for Interpretation of the Recent INCA Campaign

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

Study of Aerosol Particle Scavenging by Rain, Experiments and Modelling

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

Study of Aerosol Scavenging by Rain in Case of a Radioactive Contamination of the Atmosphere

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

Cirrus cloud microphysical and optical properties at southern and northern midlatitudes during the INCA experiment

Jean-François Gayet; J. Ovarlez; V. Shcherbakov; Johan Ström; Ulrich Schumann; Andreas Minikin; Frédérique Auriol; Andreas Petzold; Marie Monier


Atmospheric Chemistry and Physics | 2014

Quantification of ice nuclei active at near 0 C temperatures in low-altitude clouds at the Puy de Dôme atmospheric station

Muriel Joly; Pierre Amato; Laurent Deguillaume; Marie Monier; C. Hoose; Anne-Marie Delort


Journal of Geophysical Research | 2003

The deposition coefficient and its role for cirrus clouds

Klaus M. Gierens; Marie Monier; Jean-François Gayet


Atmospheric Chemistry and Physics | 2011

Hygroscopic growth and droplet activation of soot particles: uncoated, succinic or sulfuric acid coated

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

A numerical study of the effects of the aerosol particle spectrum on the development of the ice phase and precipitation formation

Delphine Leroy; Marie Monier; Wolfram Wobrock; Andrea I. Flossmann


Atmospheric Research | 2014

The importance of new collection efficiency values including the effect of rear capture for the below-cloud scavenging of aerosol particles

Arnaud Quérel; Marie Monier; Andrea I. Flossmann; Pascal Lemaitre; Emmanuel Porcheron

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Emmanuel Porcheron

Institut de radioprotection et de sûreté nucléaire

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Pascal Lemaitre

Institut de radioprotection et de sûreté nucléaire

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Arnaud Quérel

Institut de radioprotection et de sûreté nucléaire

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K. Sellegri

Blaise Pascal University

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Laurent Deguillaume

Centre national de la recherche scientifique

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Muriel Joly

Centre national de la recherche scientifique

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P. Laj

Centre national de la recherche scientifique

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