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README for DATASET: "Data from: How large is the design space for stratospheric aerosol geoengineering?"
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This readme document describes the datasets used in the ESD paper: Zhang, Y., MacMartin, D. G., Visioni, D., & Kravitz, B. (2021). How large is the design space for stratospheric aerosol geoengineering? Earth System Dynamics. to be submitted.

Please cite this dataset as: Zhang, Y., MacMartin, D. G., Visioni, D., & Kravitz, B. (2021). Data from: How large is the design space for stratospheric aerosol geoengineering? [Dataset] Cornell University eCommons Repository. https://doi.org/10.7298/f1e4-sq40

Contact Information: 
Yan Zhang, yz2545@cornell.edu
Douglas G. MacMartin, dgm224@cornell.edu

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 been produced with the climate model CESM1(WACCM) https://www.cesm.ucar.edu/working_groups/Whole-Atmosphere/. 

These data are shared under a Creative Commons Attribution 4.0 International license (CC-BY 4.0, 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.

The single files are named as follows:
[Variable name]_[Simulation name]_2D_map_monthly.nc
and contains the variable (with a short description) and the spatial and temporal coordinates (i.e. latitude, longitude, and time). All associated coordinates are described in each file.

The variable shared is (Variable name, dimensions, long name, units):
AODViSstdn, 2D map, Stratospheric aerosol optical depth 550nm day night, unitless

The simulation shared are (Simulation name, injection season, injection latitude):
ANN7N, annual, 7.5N
ANN22N, annual, 22.5N
ANN37N, annual, 37.5N
MAM60N, MAM(March, April and May), 60N
MAM45N, MAM (March, April and May), 45N
SON45S, SON(Semptember, October and November), 45S
SON60S, SON(Semptember, October and November), 60S

Data from files labeled "ANN7N", "ANN22N" and "ANN37N" spans the 2040-2044 period. 
Data from files labeled "MAM60N", "MAM45N", "SON45S" and "SON60S" spans the 2042-2044 period. 

Acknowledgements
We would like to acknowledge high-performance computing support from Cheyenne (https://doi.org/10.5065/D6RX99HX) provided by NCAR's Computational and Information Systems Laboratory, sponsored by the National Science Foundation. Support for Y. Zhang and D. G. MacMartin was provided by the National Science Foundation through agreement CBET-1818759 and CBET-2038246. Support for D. Visioni was provided by the Atkinson Center for a Sustainable Future at Cornell University.  Support for B. Kravitz was provided in part by the National Science Foundation through agreement CBET-1931641, 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 DEAC05-76RL01830. The CESM project is supported primarily by the National Science Foundation.