How certain are we of the uncertainties in recent ozone profile trend assessments of merged limb/occultation records? Challenges and possible ways forward.

Daan Hubert1, Jean-Christopher Lambert2, Tijl Verhoelst2, Jose Granville2, Arno Keppens2, Jean-Luc Baray3, Ugo Cortesi4, Doug A Degenstein5, Lucien Froidevaux6, Sophie Godin-Beekmann7, Karl Hoppel8, Erkki T Kyrola9, Thierry Leblanc10, Günter Lichtenberg11, Charles T McElroy12, Donal P Murtagh13, James M Russell III14, J. Salvador15, Herman G J Smit16, Kerstin Stebel17, Wolfgang Steinbrecht18, Kevin B Strawbridge19, Rene Stubi20, Daan P. J. Swart21, Ghassan Taha22, Anne M Thompson23, Joachim Urban24, Anne van Gijsel25, Peter von Der Gathen26, Kaley A Walker27,28, Elian Wolfram29, Joseph M Zawodny30 and Hideaki Nakane31, (1)Belgian Institute for Space Aeronomy, Brussels, Belgium, (2)Royal Belgian Institute for Space Aeronomy, Brussels, Belgium, (3)Lacy/OSU-Reunion and OPGC, Reunion, France, (4)IFAC-CNR, Firenze, Italy, (5)University of Saskatchewan, Institute of Space and Atmospheric Studies, Saskatoon, SK, Canada, (6)NASA Jet Propulsion Laboratory, California Institute of Technology, Pasadena, United States, (7)CNRS, UVSQ, LATMOS, Guyancourt, France, (8)U.S. Naval Research Laboratory, Remote Sensing Division, Washington, DC, United States, (9)Finnish Meteorological Institute, Helsinki, Finland, (10)NASA Jet Propulsion Laboratory, Table Mountain Facility, Pasadena, CA, United States, (11)German Aerospace Center DLR - IMF, Oberpfaffenhofen, Germany, (12)York University, Toronto, ON, Canada, (13)Chalmers University, Göteburg, Sweden, (14)Hampton University, Department of Atmospheric and Planetary Sciences, Hampton, VA, United States, (15)CEILAP, CITEDEF, CONICET, Buenos Aires, Argentina, (16)Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung 8 - Troposphäre, Jülich, Germany, (17)Norwegian Institute for Air Research, Kjeller, Norway, (18)Deutscher Wetterdienst Meteorological Observatory Hohenpeissenberg, Hohenpeissenberg, Germany, (19)Environment Canada Toronto, Toronto, ON, Canada, (20)MeteoSwiss Federal Office of Meteorology and Climatology, Zurich, Switzerland, (21)National Institute for Public Health and the Environment (RIVM), Bilthoven, Netherlands, (22)Morgan State University, NASA/code 614, Baltimore, MD, United States, (23)University of Maryland Baltimore County at NASA/GSFC, Baltimore, United States, (24)Chalmers University of Technology, Gothenburg, Sweden, (25)Royal Netherlands Meteorological Institute, De Bilt, Netherlands, (26)Alfred Wegener Institute, Helmholtz-Center for Polar and Marine Research Potsdam, Potsdam, Germany, (27)University of Waterloo, Waterloo, ON, Canada, (28)University of Toronto, Department of Physics, Toronto, ON, Canada, (29)CITEDEF, Buenos Aires, Argentina, (30)NASA Langley Research Center, Hampton, VA, United States, (31)Kochi University of Technology, Kami, Kochi, Japan