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

Lowe, D. and MacKenzie, A.R. and Schlager, H. and Voigt, C. and Dörnbrack, A. and Mahoney, M.J. and Cairo, F. (2006) Liquid particle composition and heterogeneous reactions in a mountain wave Polar Stratospheric Cloud. Atmospheric Chemistry and Physics, 6, pp. 3611-3623.

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Official URL: http://www.atmos-chem-phys.net/6/3611/2006


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. PSC particle composition, backscatter and chlorine activation for this case are studied with a recently developed non-equilibrium microphysical box model for liquid aerosol. Results from the microphysical model, run on quasi-lagrangian trajectories, show that the PSC observed was composed of supercooled ternary (H2O/HNO3/H2SO4) solution (STS) particles, which are out of equilibrium with the gas phase. The measured condensed nitric acid and aerosol backscatter 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, showing the propensity of these small-scale clouds for chlorine activation. Equilibrium calculations – of the sort commonly used in large scale chemistry transport models – overestimate the measured condensed nitrate by up to a factor of 3, and overestimates chlorine activation by 10%, in this mountain wave cloud

Document Type:Article
Title:Liquid particle composition and heterogeneous reactions in a mountain wave Polar Stratospheric Cloud
AuthorsInstitution or Email of Authors
Lowe, D.Lancaster Univ., Lancaster, UK
MacKenzie, A.R.Lancaster Univ., Lancaster, UK
Mahoney, M.J.California Inst. of Technology, Pasadena, CA, USA
Cairo, F.CNR-ISAC, Rome, I
Date:6 September 2006
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 3611-3623
Keywords:Ice clouds, Halogene activation, Polar stratospheric cloud
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Low-Emission Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Helga Jesse
Deposited On:12 Dec 2006
Last Modified:11 Nov 2014 21:56

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