Atmos. Chem. Phys., 13, 9233-9268, 2013
www.atmos-chem-phys.net/13/9233/2013/
doi:10.5194/acp-13-9233-2013
© Author(s) 2013. This work is distributed
under the Creative Commons Attribution 3.0 License.
Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions (RECONCILE): activities and results
M. von Hobe1, S. Bekki2, S. Borrmann3, F. Cairo4, F. D'Amato5, G. Di Donfrancesco32, A. Dörnbrack6, A. Ebersoldt7, M. Ebert8, C. Emde9, I. Engel10,******, M. Ern1, W. Frey3,*, S. Genco4, S. Griessbach11, J.-U. Grooß1, T. Gulde12, G. Günther1, E. Hösen13, L. Hoffmann11, V. Homonnai14, C. R. Hoyle10,**, I. S. A. Isaksen15, D. R. Jackson16, I. M. Jánosi14, R. L. Jones17, K. Kandler8, C. Kalicinsky13, A. Keil18, S. M. Khaykin19, F. Khosrawi20, R. Kivi21, J. Kuttippurath2, J. C. Laube22, F. Lefèvre2, R. Lehmann23, S. Ludmann24, B. P. Luo10, M. Marchand2, J. Meyer1, V. Mitev25, S. Molleker3, R. Müller1, H. Oelhaf12, F. Olschewski13, Y. Orsolini26, T. Peter10, K. Pfeilsticker24, C. Piesch12, M. C. Pitts27, L. R. Poole28, F. D. Pope17,***, F. Ravegnani4, M. Rex23, M. Riese1, T. Röckmann29, B. Rognerud15, A. Roiger6, C. Rolf1, M. L. Santee30, M. Scheibe6, C. Schiller1, H. Schlager6, M. Siciliani de Cumis5, N. Sitnikov19, O. A. Søvde15, R. Spang1, N. Spelten1, F. Stordal15, O. Sumińska-Ebersoldt1,****, A. Ulanovski19, J. Ungermann1, S. Viciani5, C. M. Volk13, M. vom Scheidt13, P. von der Gathen23, K. Walker31, T. Wegner1, R. Weigel3, S. Weinbruch8, G. Wetzel12, F. G. Wienhold10, I. Wohltmann23, W. Woiwode12, I. A. K. Young17,*****, V. Yushkov19, B. Zobrist10, and F. Stroh1
1Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-7), Jülich, Germany
2LATMOS-IPSL, UPMC Univ. Paris 06, Université Versailles St.-Quentin, CNRS/INSU, Paris, France
3Max Planck Institute for Chemistry, Particle Chemistry Department, Mainz, Germany
4Institute of Atmospheric Science and Climate, ISAC-CNR, Italy
5CNR-INO (Istituto Nazionale di Ottica), Largo E. Fermi, 6, 50125 Firenze, Italy
6Deutsches Zentrum für Luft- und Raumfahrt (DLR), Institut für Physik der Atmosphäre, Oberpfaffenhofen, 82234 Weßling, Germany
7Institute for Data Processing and Electronics, Karlsruhe Institute of Technology, Karlsruhe, Germany
8Technische Universität Darmstadt, Institut für Angewandte Geowissenschaften, Umweltmineralogie, Darmstadt, Germany
9Meteorologisches Institut, Ludwig-Maximilians-Universität, München, Germany
10ETH Zurich, Institute for Atmospheric and Climate Science, Zurich, Switzerland
11Jülich Supercomputing Centre (JSC), Forschungszentrum Jülich GmbH, Jülich, Germany
12Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
13Department of Physics, University of Wuppertal, Germany
14Department of Physics of Complex Systems, Eötvös Loránd University, Pázmány P. s. 1/A, 1117 Budapest, Hungary
15Department of Geosciences, University of Oslo, Oslo, Norway
16Met Office, Exeter, UK
17University of Cambridge, Department of Chemistry, Cambridge, UK
18Institute for Atmospheric and Environmental Sciences, Goethe University Frankfurt, Frankfurt, Germany
19Central Aerological Observatory, Dolgoprudny, Moskow Region, Russia
20MISU, Stockholm University, Stockholm, Sweden
21Finnish Meteorological Institute, Arctic Research, Sodankylä, Finland
22University of East Anglia, School of Environmental Sciences, Norwich, UK
23Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
24Institut für Umweltphysik, University of Heidelberg, Germany
25CSEM Centre Suisse d'Electronique et de Microtechnique SA, Neuchâtel, Switzerland
26Norwegian Institute for Air Research, Kjeller, Norway
27NASA Langley Research Center, Hampton, VA 23681, USA
28Science Systems and Applications, Inc. Hampton, VA 23666, USA
29Institute for Marine and Atmospheric Research Utrecht (IMAU), Utrecht University, Utrecht, the Netherlands
30JPL/NASA, California Institute of Technology, Pasadena, California, USA
31Department of Physics, University of Toronto, Toronto, Canada
32Ente Nazionale per le Nuove tecnologie, l'Energia e l'Ambiente, Roma, Italy
*now at: School of Earth Sciences, The University of Melbourne, Melbourne, Australia
**now at: Laboratory of Atmospheric Chemistry, Paul Scherrer Institut, Villigen, Switzerland
***now at: School of Geography, Earth and Environmental Sciences, University of Birmingham, UK
****now at: Institute for Meteorology and Climate Research, Karlsruhe Institute of Technology, Karlsruhe, Germany
*****now at: The British Museum, London, UK
******now at: Forschungszentrum Jülich GmbH, Institute of Energy and Climate Research (IEK-7), Jülich, Germany

Abstract. The international research project RECONCILE has addressed central questions regarding polar ozone depletion, with the objective to quantify some of the most relevant yet still uncertain physical and chemical processes and thereby improve prognostic modelling capabilities to realistically predict the response of the ozone layer to climate change. This overview paper outlines the scope and the general approach of RECONCILE, and it provides a summary of observations and modelling in 2010 and 2011 that have generated an in many respects unprecedented dataset to study processes in the Arctic winter stratosphere. Principally, it summarises important outcomes of RECONCILE including (i) better constraints and enhanced consistency on the set of parameters governing catalytic ozone destruction cycles, (ii) a better understanding of the role of cold binary aerosols in heterogeneous chlorine activation, (iii) an improved scheme of polar stratospheric cloud (PSC) processes that includes heterogeneous nucleation of nitric acid trihydrate (NAT) and ice on non-volatile background aerosol leading to better model parameterisations with respect to denitrification, and (iv) long transient simulations with a chemistry-climate model (CCM) updated based on the results of RECONCILE that better reproduce past ozone trends in Antarctica and are deemed to produce more reliable predictions of future ozone trends. The process studies and the global simulations conducted in RECONCILE show that in the Arctic, ozone depletion uncertainties in the chemical and microphysical processes are now clearly smaller than the sensitivity to dynamic variability.

Citation: von Hobe, M., Bekki, S., Borrmann, S., Cairo, F., D'Amato, F., Di Donfrancesco, G., Dörnbrack, A., Ebersoldt, A., Ebert, M., Emde, C., Engel, I., Ern, M., Frey, W., Genco, S., Griessbach, S., Grooß, J.-U., Gulde, T., Günther, G., Hösen, E., Hoffmann, L., Homonnai, V., Hoyle, C. R., Isaksen, I. S. A., Jackson, D. R., Jánosi, I. M., Jones, R. L., Kandler, K., Kalicinsky, C., Keil, A., Khaykin, S. M., Khosrawi, F., Kivi, R., Kuttippurath, J., Laube, J. C., Lefèvre, F., Lehmann, R., Ludmann, S., Luo, B. P., Marchand, M., Meyer, J., Mitev, V., Molleker, S., Müller, R., Oelhaf, H., Olschewski, F., Orsolini, Y., Peter, T., Pfeilsticker, K., Piesch, C., Pitts, M. C., Poole, L. R., Pope, F. D., Ravegnani, F., Rex, M., Riese, M., Röckmann, T., Rognerud, B., Roiger, A., Rolf, C., Santee, M. L., Scheibe, M., Schiller, C., Schlager, H., Siciliani de Cumis, M., Sitnikov, N., Søvde, O. A., Spang, R., Spelten, N., Stordal, F., Sumińska-Ebersoldt, O., Ulanovski, A., Ungermann, J., Viciani, S., Volk, C. M., vom Scheidt, M., von der Gathen, P., Walker, K., Wegner, T., Weigel, R., Weinbruch, S., Wetzel, G., Wienhold, F. G., Wohltmann, I., Woiwode, W., Young, I. A. K., Yushkov, V., Zobrist, B., and Stroh, F.: Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions (RECONCILE): activities and results, Atmos. Chem. Phys., 13, 9233-9268, doi:10.5194/acp-13-9233-2013, 2013.
 
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