Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions

• Verfasst von: Hobe, Marc von [VerfasserIn]
• Verfasst von: Ludmann, Sabrina [VerfasserIn]
• Verfasst von: Pfeilsticker, Klaus [VerfasserIn]
• Titel: Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions
• Verf.angabe: M. von Hobe, S. Bekki, S. Borrmann, F. Cairo, F. D'Amato, G. Di Donfrancesco, A. Dörnbrack, A. Ebersoldt, M. Ebert, C. Emde, I. Engel, M. Ern, W. Frey, S. Griessbach, J.-U. Grooß, T. Gulde, G. Günther, E. Hösen, L. Hoffmann, V. Homonnai, C.R. Hoyle, I.S.A. Isaksen, D.R. Jackson, I M. Jánosi, K. Kandler, C. Kalicinsky, A. Keil, S.M. Khaykin, F. Khosrawi, R. Kivi, J. Kuttippurath, J.C. Laube, F. Lefèvre, R. Lehmann, S. Ludmann, B.P. Luo, M. Marchand, J. Meyer, V. Mitev, S. Molleker, R. Müller, H. Oelhaf, F. Olschewski, Y. Orsolini, T. Peter, K. Pfeilsticker, C. Piesch, M.C. Pitts, L.R. Poole, F.D. Pope, F. Ravegnani, M. Rex, M. Riese, T. Röckmann, B. Rognerud, A. Roiger, C. Rolf, M.L. Santee, M. Scheibe, C. Schiller, H. Schlager, M. Siciliani de Cumis, N. Sitnikov, O.A. Søvde, R. Spang, N. Spelten, F. Stordal, O. Sumińska-Ebersoldt, S. Viciani, C.M. Volk, M. vom Scheidt, A. Ulanovski, P. von der Gathen, K. Walker, T. Wegner, R. Weigel, S. Weinbruch, G. Wetzel, F.G. Wienhold, J. Wintel, I. Wohltmann, W. Woiwode, I.a.K. Young, V. Yushkov, B. Zobrist, and F. Stroh
• Umfang: 94 S.
• Fussnoten: Discussion paper ; Gesehen am 24.07.2018
• Titel Quelle: Enthalten in: Atmospheric chemistry and physics / Discussions
• Jahr Quelle: 2012
• Band/Heft Quelle: 12(2012), S. 30661-30754
• ISSN Quelle: 1680-7375
• DOI: doi:10.5194/acpd-12-30661-2012
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1577877594

Abstract

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 thatincludes 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.