Recovered measurements of the 1960s stratospheric aerosol layer for new constraints for volcanic forcing in the years after 1963 Agung

1:School of Earth and Environment, University of Leeds, Leeds, U.K. 2: UK National Centre for Atmospheric Science (NCAS), Univ. Leeds, U.K. 3: Department of Theoretical Physics, University of Vallidolid, Vallidolid, Spain 4: NASA Langley Research Center, Hampton, Virginia, U.S.A. 5: Institute for Atmospheric and Climate Science, ETH-Zurich, Switzerland 6: Dept. of Physics and Astronomy, University of Wyoming, Laramie, Wyoming, U.S.A.