Strong constraints on aerosol–cloud interactions from volcanic eruptions

James Matthew Haywood1, Florent Malavelle2, Andy Jones3, Andrew Gettelman4, Lieven Clarisse5, inger Helene Karset6, Sophie Bauduin7, Richard Philip Allan8, Jon Egill Kristjansson9, Lazaros Oreopoulos10, Nayeong Cho10, Dongmin Lee11, Nicolas Bellouin12, Olivier Boucher13, Daniel Peter Grosvenor14, Ken S Carslaw14, Sandip Dhomse15, Graham W Mann14, Anja Schmidt15, Hugh Coe16, Margaret E Hartley17, M Dalvi18, Adrian A Hill19, Ben Thomas Johnson18, Colin Johnson3, Jeff R Knight20, Fiona O'Connor20, Daniel Partridge21, Philip Stier22, Gunnar Myhre23, Steven E Platnick24, Hanii Takahashi25, Graeme L Stephens26 and Thor Thordarson27, (1)University of Exeter, Exeter, EX4, United Kingdom, (2)University of Exeter, Exeter, United Kingdom, (3)Met Office Hadley Centre for Climate Science and Services, Exeter, United Kingdom, (4)NCAR, Boulder, CO, United States, (5)Université Libre de Bruxelles, Spectroscopie de l’Atmosphère, Service de Chimie Quantique et Photophysique, Brussels, Belgium, (6)University of Oslo, Department of Geosciences, Oslo, Norway, (7)Université Libre de Bruxelles, Brussels, Belgium, (8)University of Reading, READING, United Kingdom, (9)University of Oslo, Oslo, Norway, (10)NASA GSFC, Greenbelt, MD, United States, (11)Morgan State University, Baltimore, MD, United States, (12)University of Reading, Department of Meteorology, Reading, United Kingdom, (13)LMD, Paris Cedex 05, France, (14)University of Leeds, Leeds, LS2, United Kingdom, (15)University of Leeds, Leeds, United Kingdom, (16)University of Manchester, School of Earth and Environmental Sciences, Manchester, United Kingdom, (17)University of Cambridge, Cambridge, United Kingdom, (18)Met Office, Exeter, United Kingdom, (19)United Kingdom Met Office, Exeter, United Kingdom, (20)Met Office Hadley Centre, Exeter, United Kingdom, (21)Norwegian Meteorological Institute, Oslo, Norway, (22)University of Oxford, Department of Physics, Oxford, United Kingdom, (23)Center for International Climate and Environmental Research Oslo, Oslo, Norway, (24)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (25)Jet Propulsion Lab, Pasadena, CA, United States, (26)Jet Propulsion Laboratory, Pasadena, CA, United States, (27)University of Iceland, Nordic Volcanological Center, Institute of Earth Sciences, Reykjavik, Iceland