Julie M Nicely^1,2, Thomas F Hanisco³, Makoto Deushi⁴, Amund Sovde Haslerud⁵, Patrick Joeckel⁶, Beatrice Josse⁷, Douglas Edward Kinnison⁸, Andrew R Klekociuk⁹, Michael Manyin¹⁰, Virginie Marecal¹¹, Olaf Morgenstern¹², Lee T Murray¹³, Gunnar Myhre¹⁴, Luke Oman², Giovanni Pitari¹⁵, Andrea Pozzer¹⁶, Ilaria Quaglia¹⁷, Laura E. Revell¹⁸, Eugene Rozanov¹⁹, Ross J Salawitch²⁰, Andrea Stenke²¹, Kane Stone²², Susan Elaine Strahan²³, Simone Tilmes²⁴, Holger Tost²⁵, Daniel Westervelt²⁶, Guang Zeng²⁷ and Bryan N Duncan³, (1)University of Maryland College Park, College Park, MD, United States, (2)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (3)NASA GSFC, Greenbelt, MD, United States, (4)Meteorological Research Inst., Tsukuba, Japan, (5)Cicero Center for International Climate Research, Oslo, Norway, (6)German Aerospace Center Oberpfaffenhofen, Institute of Atmospheric Physics, Oberpfaffenhofen-Wessling, Germany, (7)Météo-France Toulouse, Toulouse Cedex 01, France, (8)NCAR, Boulder, CO, United States, (9)Australian Antarctic Division, Kingston, TAS, Australia, (10)Science Systems and Applications, Inc., Lanham, MD, United States, (11)Meteo France, Toulouse, France, (12)National Institute of Water and Atmospheric Research (NIWA), Wellington, New Zealand, (13)University of Rochester, Department of Earth and Environmental Sciences, Rochester, NY, United States, (14)Center for International Climate and Environmental Research Oslo, Oslo, Norway, (15)Organization Not Listed, Washington, DC, United States, (16)Max Planck Institute for Chemistry, Mainz, Germany, (17)University of L'Aquila, L'Aquila, Italy, (18)Bodeker Scientific, Alexandra, New Zealand, (19)PMOD WRC Physical Meteorological Observatory Davos and World Radiation Center, Davos Dorf, Switzerland, (20)University of Maryland, College Park, MD, United States, (21)ETH Swiss Federal Institute of Technology Zurich, Zurich, Switzerland, (22)Massachusetts Institute of Technology, Cambridge, MA, United States, (23)Universities Space Research Association, NASA/code 614, Greenbelt, MD, United States, (24)National Center for Atmospheric Research, Atmospheric Chemistry, Observations, and Modeling Laboratory, Boulder, CO, United States, (25)Johannes Gutenberg University of Mainz, Institute for Atmospheric physics, Mainz, Germany, (26)Columbia University of New York, Palisades, United States, (27)National Institute of Water and Atmospheric Research, Wellington, New Zealand