edu.ucar.opensky::articles:21230 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-25T16:08:39.808103 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7g73hc5 https://doi.org/10.5065/D6PC313T https Related Dataset #1 Control and feedback SO2 simulations https://doi.org/10.5285/76ebdc0b-0eed-4f70-b89e-55e606bcd568 https Related Dataset #2 VolcanEESM: Global volcanic sulphur dioxide (SO2) emissions database from 1850 to present - Version 1.0 Radiative and chemical response to interactive stratospheric sulfate aerosols in fully coupled CESM1(WACCM) 2017-12-16T00:00:00Z publication https://n2t.org/ark:/85065/d7g73hc5 https://doi.org/10.1002/2017JD027006 Mills, Michael J. author Richter, Jadwiga H. author Tilmes, Simone author Kravitz, Ben author MacMartin, Doug author Glanville, Anne A. author Tribbia, Joseph author Lamarque, Jean-François author Vitt, Francis M. author Schmidt, Anja author Gettelman, Andrew author Hannay, Cecile E. author Bacmeister, Julio author Kinnison, Douglas E. author UCAR/NCAR - Library publisher We present new insights into the evolution and interactions of stratospheric aerosol using an updated version of the Whole Atmosphere Community Climate Model (WACCM). Improved horizontal resolution, dynamics, and chemistry now produce an internally generated quasi-biennial oscillation and significant improvements to stratospheric temperatures and ozone compared to observations. We present a validation of WACCM column ozone and climate calculations against observations. The prognostic treatment of stratospheric sulfate aerosols accurately represents the evolution of stratospheric aerosol optical depth and perturbations to solar and longwave radiation following the June 1991 eruption of Mount Pinatubo. We confirm the inclusion of interactive OH chemistry as an important factor in the formation and initial distribution of aerosol following large inputs of sulfur dioxide (SO2) to the stratosphere. We calculate that depletion of OH levels within the dense SO2 cloud in the first weeks following the Pinatubo eruption significantly prolonged the average initial e-folding decay time for SO2 oxidation to 47days. Previous observational and model studies showing a 30day decay time have not accounted for the large (30-55%) losses of SO2 on ash and ice within 7-9days posteruption and have not correctly accounted for OH depletion. We examine the variability of aerosol evolution in free-running climate simulations due to meteorology, with comparison to simulations nudged with specified dynamics. We assess calculated impacts of volcanic aerosols on ozone loss with comparisons to observations. The completeness of the chemistry, dynamics, and aerosol microphysics in WACCM qualify it for studies of stratospheric sulfate aerosol geoengineering. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright 2017 American Geophysical Union. None eng geoscientificInformation