Fractional release factors of long-lived halogenated organic compounds in the tropical stratosphere
Johannes C. Laube,Johannes C. Laube,Andreas Engel,Harald Bönisch,T. Möbius,William T. Sturges,Marc Braß,Thomas Röckmann +7 more
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In this paper, the first set of vertically resolved fractional release factors for 15 long-lived halocarbons in the tropical stratosphere up to 34 km altitude were calculated from measurements on air samples collected on board balloons and a high altitude aircraft.Abstract:
Fractional release factors (FRFs) of organic trace gases are time-independent quantities that influence the calculation of Global Warming Potentials and Ozone Depletion Potentials. We present the first set of vertically resolved FRFs for 15 long-lived halocarbons in the tropical stratosphere up to 34 km altitude. They were calculated from measurements on air samples collected on board balloons and a high altitude aircraft. We compare the derived dependencies of FRFs on the mean stratospheric transit times (the so-called mean ages of air) with similarly derived FRFs originating from measurements at higher latitudes and find significant differences. Moreover a comparison with averaged FRFs currently used by the World Meteorological Organisation revealed the limitations of these measures due to their observed vertical and latitudinal variability. The presented data set could be used to improve future ozone level and climate projections.read more
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Reconciliation of essential process parameters for an enhanced predictability of Arctic stratospheric ozone loss and its climate interactions (RECONCILE): activities and results
M. von Hobe,Slimane Bekki,Stephan Borrmann,Francesco Cairo,Francesco D'Amato,G. Di Donfrancesco,Andreas Dörnbrack,A. Ebersoldt,Martin Ebert,Claudia Emde,I. Engel,I. Engel,Manfred Ern,W. Frey,W. Frey,S. Genco,Sabine Griessbach,Jens-Uwe Grooß,T. Gulde,Gebhard Günther,E. Hösen,Lars Hoffmann,Viktória Homonnai,Christopher R. Hoyle,Christopher R. Hoyle,Ivar S. A. Isaksen,David Jackson,Imre M. Jánosi,Roderic L. Jones,Konrad Kandler,Christoph Kalicinsky,A. Keil,Sergey Khaykin,F. Khosrawi,Rigel Kivi,Jayanarayanan Kuttippurath,Johannes C. Laube,Franck Lefèvre,Ralph Lehmann,S. Ludmann,B. P. Luo,Marion Marchand,Jessica Meyer,Valentin Mitev,Sergej Molleker,Ralph Müller,Hermann Oelhaf,Friedhelm Olschewski,Yvan J. Orsolini,Thomas Peter,Klaus Pfeilsticker,C. Piesch,Michael C. Pitts,Lamont R. Poole,Francis D. Pope,Francis D. Pope,Fabrizio Ravegnani,Markus Rex,Martin Riese,Thomas Röckmann,B. Rognerud,Anke-Elisabeth Roiger,Christian Rolf,Michelle L. Santee,Monika Scheibe,Cornelius Schiller,Hans Schlager,M. Siciliani de Cumis,N. Sitnikov,O. A. Søvde,Reinhold Spang,Nicole Spelten,Frode Stordal,O. Sumińska-Ebersoldt,O. Sumińska-Ebersoldt,A. Ulanovski,Jörn Ungermann,S. Viciani,C. M. Volk,M. vom Scheidt,P. von der Gathen,Kaley A. Walker,Tobias Wegner,Ralf Weigel,Stephan Weinbruch,Gerald Wetzel,Frank G. Wienhold,Ingo Wohltmann,Wolfgang Woiwode,I. A. K. Young,I. A. K. Young,Vladimir Yushkov,B. Zobrist,Fred Stroh +93 more
TL;DR: The European project RECONCILE has comprehensively addressed remaining questions in the context of polar ozone depletion, with the objective to quantify the rates of some of the most relevant, yet still uncertain physical and chemical processes as mentioned in this paper.
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A review of major chlorofluorocarbons and their halocarbon alternatives in the air
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Observation-based assessment of stratospheric fractional release, lifetimes, and ozone depletion potentials of ten important source gases
Johannes C. Laube,A. Keil,Harald Bönisch,Andreas Engel,Thomas Röckmann,C. M. Volk,William T. Sturges +6 more
TL;DR: In this article, the authors present data from the analysis of air samples collected between 2009 and 2011 on board research aircraft flying in the mid and high-latitude stratosphere and infer the above-mentioned parameters for ten major source gases: CFCl3 (CFC-11), CF2Cl2 (cFC-12),CF2ClCFCl2(cfc-113), CCl4 (carbon tetrachloride), CH3CCl3(methyl chloroform), CHF2Cl (HCFC-22, CH3CFClCl
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Accelerating growth of HFC-227ea (1,1,1,2,3,3,3-heptafluoropropane) in the atmosphere
Johannes C. Laube,Patricia Martinerie,Emmanuel Witrant,Thomas Blunier,Jakob Schwander,Carl A. M. Brenninkmeijer,Tanja Schuck,M. Bolder,Thomas Röckmann,C. J. van der Veen,Harald Bönisch,Andreas Engel,Graham P. Mills,Mike J. Newland,David E. Oram,Claire E. Reeves,William T. Sturges +16 more
TL;DR: In this paper, the first measurements of 1,1, 1,2, 2,3, 3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50
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Evidence for heterogeneous chlorine activation in the tropical UTLS
M. von Hobe,Jens-Uwe Grooß,Gebhard Günther,Paul Konopka,Iulia Gensch,Martina Krämer,Nicole Spelten,Armin Afchine,C. Schiller,A. Ulanovsky,N. Sitnikov,G. Shur,Vladimir Yushkov,Fabrizio Ravegnani,Francesco Cairo,Anke-Elisabeth Roiger,Christiane Voigt,Hans Schlager,Ralf Weigel,W. Frey,Stephan Borrmann,Rolf Müller,Fred Stroh +22 more
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References
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