=========================================================================================================== README for DATASET "Data from: Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering?" =========================================================================================================== This readme file describes the dataset used in the following JGR-Atmosphere paper: Visioni, D., MacMartin, D. G., & Kravitz, B. (2021). Is turning down the sun a good proxy for stratospheric sulfate geoengineering? Journal of Geophysical Research: Atmospheres, 126, e2020JD033952. https://doi.org/10.1029/2020JD033952 Please cite this dataset as: Visioni, Daniele; MacMartin, Douglas; Kravitz, Ben (2021) Data from: Data from: Is Turning Down the Sun a Good Proxy for Stratospheric Sulfate Geoengineering? [Dataset] Cornell University eCommons Digital Repository. https://doi.org/10.7298/c92j-2p46 This dataset is shared under a Attribution 4.0 International (CC BY 4.0) license (https://creativecommons.org/licenses/by/4.0/). The material can be shared and built upon, but attribution to the original authors and a statement of changes made is required. All files in the dataset are NetCDF (Network Common Data Form) and can be easily read in common programming languages (python, Matlab, R, NCL, C++, and others). Files have beeb produced with the climate model CESM1(WACCM) https://www.cesm.ucar.edu/working_groups/Whole-Atmosphere/. Simulations have been performed to simulate the injection of SO2 in the stratosphere (in the SS simulations) or to simulate the artificial dimming of the sun (in the SD simulations) with different temperature goals (1x1 or 3x3). All data spans the 2070-2089 period and the simulations are further described in the associated paper. For the 3x3SS and 1x1SS case described in the paper, and for the Control data, please refer to https://doi.org/10.5065/D6JH3JXX Variables are grouped into .zip files of the same name for easier download (see "folder" in the table below). The single files are described as follow: [Variable name]_[Simulation name]_[ensemble member]_[type of spatial average]_monthly.nc and contains the variable (with a short description) and the spatial and temporal coordinates (i.e. latitude, longitude (when applicable) and vertical levels (when applicable, in hPa)). All associated coordinates are described in each file. [type of spatial average] can be either "map" (latitude times longitude) or "zm" (averaged over longitude). The variables shared are: ==================================================================================================================== Variable name dimensions long name units folder PRECC 2D-map Precipitation rate (convective) m/s surface_hydrology PRECL 2D-map Precipitation rate (large scale) m/s surface_hydrology PRECTMX 2D-map Precipitation rate (total) (monthly max) m/s surface_hydrology QFLX 2D-map Surface water flux (evapotranspiration rate) kg/m2/s surface_hydrology O3 3D-zm Ozone concentration mol/mol 3d_variables H2O 3D-zm Water vapor concentration mol/mol 3d_variables CLDTOT 2D-map Total cloud coverage unitless surface_impacts TLAI 2D-map Total projected leaf area index unitless surface_impacts FSDS 2D-map Downwelling radiation at the surface W/m2 surface_impacts FSDSVD 2D-map Downwelling direct radiation at the surface W/m2 surface_impacts FSDSND 2D-map Downwelling diffuse radiation at the surface W/m2 surface_impacts TREFHT 2D-map Reference height temperature K surface_temp TREFHTMX 2D-map Reference height temperature (monthly max) K surface_temp TREFHTMN 2D-map Reference height temperature (monthly min) K surface_temp Acknowledgments We would like to acknowledge high-performance computing support from Cheyenne (doi:10.5065/D6RX99HX) provided by NCAR's Computational and Information Systems Laboratory, sponsored by the National Science Foundation. Support for D. V. and D. G. M. was provided by the Atkinson Center for a Sustainable Future at Cornell University and by the National Science Foundation through agreement CBET-1818759. This research was supported in part by the Indiana University Environmental Resilience Institute and the Prepared for Environmental Change grand challenge initiative. The Pacific Northwest National Laboratory is operated for the U.S. Department of Energy by Battelle Memorial Institute under contract DE-AC05-76RL01830. The CESM project is supported primarily by the National Science Foundation. This work was supported by the National Center for Atmospheric Research, which is a major facility sponsored by the National Science Foundation under Cooperative Agreement No. 1852977.