Journal cover Journal topic
Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/gmdd-4-1185-2011
© Author(s) 2011. This work is distributed under
the Creative Commons Attribution 3.0 License.
Development and technical paper
14 Jun 2011
Review status
This discussion paper is a preprint. It has been under review for the journal Geoscientific Model Development (GMD). The revised manuscript was not accepted.
Carbon monoxide as a tracer for tropical troposphere to stratosphere transport in the Chemical Lagrangian Model of the Stratosphere (CLaMS)
R. Pommrich1,4,5, R. Müller1, J.-U. Grooß1, P. Konopka1, G. Günther1, H.-C. Pumphrey2, S. Viciani3, F. D'Amato3, and M. Riese1 1IEK-7, Forschungszentrum Jülich, Jülich, Germany
2School of GeoSciences, University of Edinburgh, Edinburgh, UK
3CNR-Istituto Nazionale di Ottica (CNR-INO), L. go E. Fermi 6, 50125 Firenze, Italy
4Laboratoire d'Aérologie, UMR5560, CNRS/INSU-Université de Toulouse 3, 14 Av Edouard Belin, 31400 Toulouse, France
5Groupe d'étude de l'Atmosphère Météorologique, URA 1357, CNRM-GAME, Météo-France, 42 Av Gaspard Coriolis, 31057 Toulouse Cedex 1, France
Abstract. Variations in the mixing ratio of trace gases of tropospheric origin entering the stratosphere in the tropics are of interest for assessing both troposphere to stratosphere transport fluxes in the tropics and the impact on the composition of the tropical lower stratosphere of quasi-horizontal in-mixing into the tropical tropopause layer from the mid-latitude stratosphere. Here, we present a simplified chemistry scheme for the Chemical Lagrangian Model of the Stratosphere (CLaMS) for the simulation, at comparatively low numerical cost, of CO, ozone, and long-lived trace substances (CH4, N2O, CCl3F, and CO2) in the lower tropical stratosphere. The boundary conditions at the ground are represented for the long-lived trace substances CH4, N2O, CCl3F, and CO2 based on ground-based measurements. The boundary condition for CO in the free troposphere is deduced from MOPITT measurements. We find that the zonally averaged tropical CO anomaly patterns simulated by this model version of CLaMS are in good agreement with observations. The introduction of a new scheme in the ECMWF integrated forecast system (Tompkins et al., 2007) for the ice supersaturation after September 2006, results in a somewhat less good agreement between observed and simulated CO patterns in the tropical lower stratosphere after this date.

Citation: Pommrich, R., Müller, R., Grooß, J.-U., Konopka, P., Günther, G., Pumphrey, H.-C., Viciani, S., D'Amato, F., and Riese, M.: Carbon monoxide as a tracer for tropical troposphere to stratosphere transport in the Chemical Lagrangian Model of the Stratosphere (CLaMS), Geosci. Model Dev. Discuss., 4, 1185-1211, https://doi.org/10.5194/gmdd-4-1185-2011, 2011.
R. Pommrich et al.
Interactive discussionStatus: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version      Supplement - Supplement
 
RC C558: 'Review', Anonymous Referee #1, 17 Aug 2011 Printer-friendly Version 
AC C672: 'Answer to referee 1', Robert Pommrich, 15 Sep 2011 Printer-friendly Version 
 
RC C562: 'review', Anonymous Referee #2, 18 Aug 2011 Printer-friendly Version 
AC C677: 'Answer to referee 2', Robert Pommrich, 15 Sep 2011 Printer-friendly Version 
R. Pommrich et al.

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