Oxygen Isotopic Fractionation in Clouds: A Bin-Resolved Microphysics Model Approach

International audienceMeasurements of the ratio of oxygen-18 to oxygen-16 are often used to reconstruct past climate or to quantify phase changes. However, in most models, the evolution of the isotopic ratio is calculated using the Rayleigh parameterization. The Descam model has recently been extended to simulate isotopic fractionation from occurring condensation/evaporation processes and the mass of oxygen-18 in aerosol particles, droplets, and ice crystals explicitly as a function of their size. In a first step, isotopic calculations are implemented into the 1.5D dynamical framework where several sensitivity studies are conducted to test the evolution of the isotopic ratio as a function of the different phase changes in a convective cloud. Though an isotopic signature can be identified for different microphysical pathways, the predominant factor for the isotopic ratio in the precipitation seems to be the dynamical evolution of the considered cloud

Cloud Processing of Aerosol Particles: Consequences for Precipitation?

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AEROSOLS: Formation and reactivity--Proceedings of the second international aerosol conference, 22-26 September 1986 (W. Berlin) : . Technische Universitat, Berlin FG Luftreinhaltung (1986). 1227 pp

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/28163/1/0000615.pd

Rain Enhancement Through Cloud Seeding

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On the effect of the chemical composition of atmospheric aerosol particles on nucleation scavenging and the formation of a cloud interstitial aerosol

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On the fundamental role of Hans Pruppacher for cloud physics and cloud chemistry

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The effect on the evolution of the drop spectrum in clouds of the preconditioning of air by successive convective elements

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A Theoretical Study of the Wet Removal of Atmospheric Pollutants. Part II: The Uptake and Redistribution Of (NH 4 ) 2 SO 4 Particles and SO 2 Gas Simultaneously Scavenged by Growing Cloud Drops

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Mesoscale Meteorological Simulations In Paris: Comparisons With Observations During The Experiment Eclap

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