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Liquid Particle Composition and Heterogeneous Reactions in a Mountain Wave Polar Stratospheric Cloud : Volume 5, Issue 5 (04/10/2005)

By Lowe, D.

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Book Id: WPLBN0003978492
Format Type: PDF Article :
File Size: Pages 34
Reproduction Date: 2015

Title: Liquid Particle Composition and Heterogeneous Reactions in a Mountain Wave Polar Stratospheric Cloud : Volume 5, Issue 5 (04/10/2005)  
Author: Lowe, D.
Volume: Vol. 5, Issue 5
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Dörnbrack, A., Lowe, D., Cairo, F., Voigt, C., Mackenzie, A. R., Schlager, H., & Mahoney, M. J. (2005). Liquid Particle Composition and Heterogeneous Reactions in a Mountain Wave Polar Stratospheric Cloud : Volume 5, Issue 5 (04/10/2005). Retrieved from http://community.ebooklibrary.org/


Description
Description: Environmental Science Dept., Lancaster University, Lancaster, UK. Mountain wave polar stratospheric clouds (PSCs) were detected on 8 February 2003 above the Scandinavian Mountains by in-situ instruments onboard the M55 Geophysica aircraft. The observations of PSC particle composition, backscatter and chlorine activation are studied with a recently developed dynamical microphysical non-equilibrium box model. Results from the microphysical model, run on quasi-lagrangian trajectories, show that the PSC is composed of supercooled ternary (H2O/HNO3/H2SO4) solutions (STS) particles, which are out of equilibrium with the gas phase. The optical properties of the PSC can well be simulated with the model. Up to 0.15 ppbv Cl2 can be released by the PSC within 2 h in reasonable agreement with the measured ClOx concentrations, but high solar zenith angles prevent a direct comparison. Equilibrium calculations commonly used in large scale chemistry transport models poorly represent the measured PSC particle composition and chlorine activation under mountain wave conditions.

Summary
Liquid particle composition and heterogeneous reactions in a mountain wave Polar Stratospheric Cloud

 

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