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README for DATASET "Data from: Scenarios for modeling solar radiation modification"
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This readme file describes the dataset used in the following PNAS paper:  MacMartin, D. G., Visioni, D., Kravitz, B., Richter, Y., Felghenhauer T., Lee W. R., Morrow D. R., Parson E. A., Sugiyama M: Scenarios for modeling solar radiation modification, Proceedings of the National Academy of Science, 2022.

Please cite this dataset as: Visioni (2022) Data from: Scenarios for modeling solar radiation modification, Cornell University eCommons Digital Repository. https://doi.org/10.7298/xr82-sv86

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 been produced with the climate model CESM2-WACCM-MA for a background simulation (SSP2-4.5) and numerous Stratospheric Aerosol Injection simulation aimed at maintaining different temperature targets. Files are organized in different .zip files depending on the variable, with the same name of the experiment, as reported in the paper.


The single files are described as follow: 
[Variable name]_b.e21.BWSSP245.f09_g17.release-cesm2.1.3.[Simulation name]_[dimensions]_[time_frequency].nc
and contains the variable (with a short description) and the spatial and temporal coordinates (i.e. latitude, longitude and vertical levels (when applicable, in hPa)). All associated coordinates  are described in each file.

Name of simulations					Ensemble #		Explanation
WACCM-MA-1deg						3			Baseline SSP2-4.5
WACCM-MA-1deg.SSP245-MA-GAUSS-DEFAULT			3			SAI aimed at maintaining temperatures at 1.5 above preindustrial started in 2035
WACCM-MA-1deg.SSP245-MA-GAUSS-LOWER-0.5			3			SAI aimed at maintaining temperatures at 1.0 above preindustrial started in 2035
WACCM-MA-1deg.SSP245-MA-GAUSS-LOWER-1.0			3			SAI aimed at maintaining temperatures at 0.5 above preindustrial started in 2035
WACCM-MA-1deg.SSP245-MA-GAUSS-DEFAULT-DELAYED.2045	1			Like SSP245-MA-GAUSS-DEFAULT, but started in 2045
WACCM-MA-1deg.SSP245-MA-GAUSS-DEFAULT-OFF-2055		1			Branching from SSP245-MA-GAUSS-DEFAULT in 2055, injection stops in 2055
WACCM-MA-1deg.SSP245-MA-GAUSS-DEFAULT-PO-2055		1			Branching from SSP245-MA-GAUSS-DEFAULT in 2055, injection phased out from 2055 to 2065
WACCM-MA-1deg.SSP245-MA-GAUSS-RESTART-2055-1y		1			Branching from WACCM-MA-1deg.SSP245-MA-GAUSS-DEFAULT-OFF-2055 in 2056, SAI restarted
WACCM-MA-1deg.SSP245-MA-GAUSS-RESTART-2055-2y		1			Branching from WACCM-MA-1deg.SSP245-MA-GAUSS-DEFAULT-OFF-2055 in 2057, SAI restarted


The variables shared are:
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Variable name		dimensions		long name				units		folder		

AODVISstdn		2D-zm			Stratospheric Aerosol Optical Depth	units		AODVISstdn
ICEFRAC			2D-zm			Sea Ice extension 			m2		ICEFRAC
MOC			2D-map			Meridional Overturning Circulation	Sv		MOC
O3_column		2D-zm			Ozone column (strat and trop)		DU		O3_column
PRECT			2D-zm			Precipitation				m/s		PRECT
QFLX			2D-zm			Evapotranspiration			mm/s		QFLX
TEMP			3D-zm			Ocean potential temperature		K		TEMP
TREFHT			2D-zm 			2m Air temperature 			K		TREFHT_zm
TREFHT			2D-map 			2m Air temperature 			K		TREFHT_map