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Particle microphysics and chemistry in remotely observed mountain polar stratospheric clouds

Carslaw, Kenneth S. and Wirth, Martin and Tsias, A. and Luo, B.P. and Dörnbrack, Andreas and Leutbecher, Martin and Volkert, Hans and Renger, Wolfgang and Bacmeister, Julio T. and Peter, Thomas (1998) Particle microphysics and chemistry in remotely observed mountain polar stratospheric clouds. Journal of Geophysical Research: Atmospheres, 103, pp. 5785-5796. ISSN 0148-0227.

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Polar stratospheric clouds (PSCs) at 22–26 km were observed over the Norwegian mountains by airborne lidar on January 15, 1995. Simulations using a mesoscale model reveal that they were caused by mountain-induced gravity waves. The clouds had a highly detailed filamentary structure with bands as thin as 100 m in the vertical, and moved insignificantly over 4 hours, suggesting them to be quasi-stationary. The aircraft flight path was parallel or close to parallel with the wind at cloud level. Such a quasi-Lagrangian observation, together with the presence of distinct aerosol layers, allows an air parcel trajectory through the cloud to be constructed and enables the lidar images to be simulated using a microphysical box model and light scattering calculations. The results yield detailed information about particle evolution in PSCs and suggest that water ice nucleated directly from liquid HNO<sub>3</sub>/H<sub>2</sub>SO<sub>4</sub>/H<sub>2</sub>O droplets as much as 4 K below the ice frost point. The observation of solid nitric acid hydrate particles downwind of the mountains shows that such mesoscale events can generate solid PSC particles that can persist on the synoptic scale. We also draw attention to the possible role of mesoscale PSCs in chlorine activation and subsequent ozone destruction.

Document Type:Article
Additional Information:LIDO-Berichtsjahr=1999,
Title:Particle microphysics and chemistry in remotely observed mountain polar stratospheric clouds
AuthorsInstitution or Email of Authors
Carslaw, Kenneth S.MPI für Chemie, Mainz
Wirth, MartinDLR, IPA
Tsias, A.MPI für Chemie, Mainz
Luo, B.P.MPI für Chemie, Mainz
Dörnbrack, AndreasDLR, IPA
Leutbecher, MartinDLR, IPA
Volkert, HansDLR, IPA
Renger, WolfgangDLR, IPA
Bacmeister, Julio T.Naval Research Lab., Washington, DC, USA
Peter, ThomasMPI für Chemie, Mainz
Journal or Publication Title:Journal of Geophysical Research: Atmospheres
Refereed publication:Yes
In Open Access:No
In ISI Web of Science:Yes
Page Range:pp. 5785-5796
Keywords:mountain waves, lidar, microphysics
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Institute of Atmospheric Physics > Lidar
Deposited By: elib DLR-Beauftragter
Deposited On:15 Jan 2008
Last Modified:11 Nov 2014 17:22

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