Journal article

Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions (RECONCILE): Activities and results

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, Gulde T, Günther G, Hösen E, Hoffmann L, Homonnai V, Hoyle C, Isaksen I, Jackson D, Jánosi I, Jones R, Kandler K, Kalicinsky C, Keil A, Khaykin S, Khosrawi F, Kivi R, Kuttippurath J, Laube J, Lefèvre F, Lehmann R, Ludmann S, Luo B, Marchand M, Meyer J, Mitev V, Molleker S, Müller R, Oelhaf H, Olschewski F, Orsolini Y, Peter T, Pfeilsticker K, Piesch C, Pitts M, Poole L, Pope F, Ravegnani F, Rex M, Riese M, Röckmann T, Rognerud B, Roiger A, Rolf C, Santee M, Scheibe M, Schiller C, Schlager H, Siciliani De Cumis M, Sitnikov N, Søvde O, Spang R, Spelten N, Stordal F, Sumiñska-Ebersoldt O, Ulanovski A, Ungermann J, Viciani S, Volk C, Vom Scheidt M, Von Der Gathen P, Walker K, Wegner T, Weigel R, Weinbruch S, Wetzel G, Wienhold F, Wohltmann I, Woiwode W, Young I, Yushkov V, Zobrist B, Stroh F ...see all

Atmospheric Chemistry and Physics, vol. 13, issue 18 (2013) pp. 9233-9268

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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 chemistryclimate 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.

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