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How stratospheric are deep stratospheric intrusions? LUAMI 2008

Trickl, Thomas and Vogelmann, Hannes and Fix, Andreas and Schäfler, Andreas and Wirth, Martin and Calpini, Bertrand and Levrat, Gilbert and Romanens, Gonzague and Apituley, Arnoud and Wilson, Keith M. and Begbie, Robert and Reichardt, Jens and Vömel, Holger and Sprenger, Michael (2016) How stratospheric are deep stratospheric intrusions? LUAMI 2008. Atmospheric Chemistry and Physics (ACP), 16 (4), pp. 8791-8815. Copernicus Publications. DOI: 10.5194/acp-16-8791-2016 ISSN 1680-7316

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Official URL: http://www.atmos-chem-phys.net/16/8791/2016/acp-16-8791-2016.html

Abstract

A large-scale comparison of water-vapour vertical-sounding instruments took place over central Europe on 17 October 2008, during a rather homogeneous deep stratospheric intrusion event (LUAMI, Lindenberg Upper-Air Methods Intercomparison). The measurements were carried out at four observational sites: Payerne (Switzerland), Bilthoven (the Netherlands), Lindenberg (north-eastern Germany), and the Zugspitze mountain (Garmisch-Partenkichen, German Alps), and by an airborne water-vapour lidar system creating a transect of humidity profiles between all four stations. A high data quality was verified that strongly underlines the scientific findings. The intrusion layer was very dry with a minimum mixing ratios of 0 to 35 ppm on its lower west side, but did not drop below 120 ppm on the higher-lying east side (Lindenberg). The dryness hardens the findings of a preceding study (“Part 1”, Trickl et al., 2014) that, e.g., 73 % of deep intrusions reaching the German Alps and travelling 6 days or less exhibit minimum mixing ratios of 50 ppm and less. These low values reflect values found in the lowermost stratosphere and indicate very slow mixing with tropospheric air during the downward transport to the lower troposphere. The peak ozone values were around 70 ppb, confirming the idea that intrusion layers depart from the lowermost edge of the stratosphere. The data suggest an increase of ozone from the lower to the higher edge of the intrusion layer. This behaviour is also confirmed by stratospheric aerosol caught in the layer. Both observations are in agreement with the idea that sections of the vertical distributions of these constituents in the source region were transferred to central Europe without major change. LAGRANTO trajectory calculations demonstrated a rather shallow outflow from the stratosphere just above the dynamical tropopause, for the first time confirming the conclusions in “Part 1” from the Zugspitze CO observations. The trajectories qualitatively explain the temporal evolution of the intrusion layers above the four stations participating in the campaign.

Item URL in elib:https://elib.dlr.de/105492/
Document Type:Article
Title:How stratospheric are deep stratospheric intrusions? LUAMI 2008
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Trickl, ThomasKarlsruher Institut für Technologie, Institut für Meteorologie und Klimaforschung, IMK-IFU, Kreuzeckbahnstr. 19, 82467 Garmisch-Partenkirchen, GermanyUNSPECIFIED
Vogelmann, HannesKarlsruher Institut für Technologie, Institut für Meteorologie und Klimaforschung, IMK-IFU, Kreuzeckbahnstr. 19, 82467 Garmisch-Partenkirchen, GermanyUNSPECIFIED
Fix, AndreasDLR, IPAUNSPECIFIED
Schäfler, AndreasDLR, IPAUNSPECIFIED
Wirth, MartinDLR, IPAUNSPECIFIED
Calpini, BertrandMeteoSwissUNSPECIFIED
Levrat, GilbertMeteoSwissUNSPECIFIED
Romanens, GonzagueMeteoSwissUNSPECIFIED
Apituley, ArnoudNational Inst. for Public Health and the Environment, Bilthoven, NLUNSPECIFIED
Wilson, Keith M.RIVMUNSPECIFIED
Begbie, RobertDWDUNSPECIFIED
Reichardt, JensDWD, Lindenberg, GermanyUNSPECIFIED
Vömel, HolgerDWDUNSPECIFIED
Sprenger, MichaelAtmospheric and Climate Science, ETH, Zürich, CHUNSPECIFIED
Date:19 July 2016
Journal or Publication Title:Atmospheric Chemistry and Physics (ACP)
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:16
DOI :10.5194/acp-16-8791-2016
Page Range:pp. 8791-8815
Editors:
EditorsEmail
UNSPECIFIEDEuropean Geosciences Union
Publisher:Copernicus Publications
ISSN:1680-7316
Status:Published
Keywords:Water vapor, lidar, stratospheric intrusion, observations
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben LIDAR-Forschung und -Entwicklung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Fix, Dr.rer.nat. Andreas
Deposited On:01 Aug 2016 10:59
Last Modified:02 May 2019 13:59

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