Strong constraints on aerosol–cloud interactions from volcanic eruptions

James Matthew Haywood1, Florent Malavelle1, Andy Jones2, Andrew Gettelman3, Lieven Clarisse4, inger Helene Karset5, Sophie Bauduin6, Richard P Allan7, Jon Egill Kristjansson8, Lazaros Oreopoulos9, Nayeong Cho10, Dongmin Lee11, Nicolas Bellouin12, Olivier Boucher13, Daniel Peter Grosvenor14, Ken S Carslaw14, Sandip Dhomse15, Graham W Mann16, Anja Schmidt17, Hugh Coe18, Margaret E Hartley19, M Dalvi20, Adrian A Hill21, Ben Thomas Johnson20, Colin Johnson2, Jeff R Knight22, Fiona M O'Connor22, Daniel Partridge1, Philip Stier23, Gunnar Myhre24, Steven E Platnick25, Hanii Takahashi26, Graeme L Stephens27 and Thor Thordarson28, (1)University of Exeter, Exeter, United Kingdom, (2)Met Office Hadley Centre for Climate Science and Services, Exeter, United Kingdom, (3)Pacific Northwest National Laboratory, Richland, WA, United States, (4)Université libre de Bruxelles (ULB), Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing (SQUARES), Brussels, Belgium, (5)University of Oslo, Department of Geosciences, Oslo, Norway, (6)Université Libre de Bruxelles, Spectroscopy, Quantum Chemistry and Atmospheric Remote Sensing, Brussel, Belgium, (7)University of Reading, Reading, United Kingdom, (8)University of Oslo, Oslo, Norway, (9)NASA GSFC, Greenbelt, United States, (10)NASA Goddard Flight Center, Greenbelt, MD, United States, (11)Morgan State University, Baltimore, MD, United States, (12)University of Reading, Department of Meteorology, Reading, United Kingdom, (13)Institut Pierre Simon Laplace, Paris, France, (14)University of Leeds, Leeds, United Kingdom, (15)University of Leeds, School of Earth and Environment, Leeds, United Kingdom, (16)University of Leeds, Leeds, LS2, United Kingdom, (17)University of Cambridge, Department of Chemistry, Cambridge, United Kingdom, (18)University of Manchester, Department of Earth and Environmental Sciences, Manchester, United Kingdom, (19)University of Manchester, Manchester, United Kingdom, (20)Met Office, Exeter, United Kingdom, (21)United Kingdom Met Office, Exeter, United Kingdom, (22)Met Office Hadley Centre, Exeter, United Kingdom, (23)University of Oxford, Department of Physics, Oxford, United Kingdom, (24)CICERO Center for International Climate Research, Oslo, Norway, (25)NASA Goddard Space Flight Center, Greenbelt, MD, United States, (26)Jet Propulsion Lab, Pasadena, CA, United States, (27)Jet Propulsion Laboratory, Pasadena, United States, (28)University of Iceland, Faculty of Earth Sciences, Reykjavik, Iceland