Effective radiative forcing (ERF) experiments with EC-Earth3
Description
# Effective radiative forcing (ERF) experiments with EC-Earth3
Contact: klaus.wyser@smhi.se
Date: 2020-10-19
The tarball contains the datasets that have been used to assess the ERF of the modified MACv2-SP forcing that has been prepared for the CovidMIP experiments. All experiments were done with the EC-Earth3 model (https://portal.enes.org/models/earthsystem-models/ec-earth/ec-earth) that includes the MACv2-SP aerosol forcing including the effects on the cloud droplet activation.
Following the CFMIP protocol the ERF is obtained by running the model in atmosphere-only mode with prescribed SST and sea-ice from the piControl simulation. Two experiments are needed to assess the ERF: a control experiment (mctl) in which the all forcings are kept constant at the pre-industrial level, and a sensitivity experiment in which only the MACv2-SP forcing is taken from a different scenario from a specific year. Both control and sensitivty experiment are then run for 55 years.
The following MACv2-SP forcings were used in the different experiments:
- **mctl**: all forcings as in the piControl experiment
- **mba2**: forcing for year 2020 from the new ssp245 baseline dataset
- **mba5**: forcing for year 2050 from the new ssp245 baseline dataset
- **mbl2**: forcing for year 2020 from the TwoYearBlip dataset
- **msg5**: forcing for year 2050 from the StrongGreen recovery dataset
- **mmg5**: forcing for year 2050 from the ModerateGreen recovery dataset
- **mff5**: forcing for year 2050 from the FossilFuel rebound dataset
The following variables from the model output are included in the dataset:
- **tsr**: Top of the atmosphere (TOA) SW radiation (all sky)
- **tsrc**: TOA SW radiation (clear sky)
- **tsra**: TOA SW radiation (cloudy sky)
- **ttr**: TOA LW radiation (all sky)
- **ttrc**: TOA LW radiation (clear sky)
- **ttra**: TOA LW radiation (cloudy sky)
- **ssr**: Surface SW radiation (all sky)
- **ssrc**: Surface SW radiation (clear sky)
- **ssra**: Surface SW radiation (cloudy sky)
- **str**: Surface LW radiation (all sky)
- **strc**: Surface LW radiation (clear sky)
- **stra**: Surface LW radiation (cloudy sky)
These variables have been used to compute timeseries and maps of the different components of the ERF:
- **erf**: ERF at TOA (all sky)
- **erfc**: ERF at TOA (clear sky)
- **erfa**: ERF at TOA (cloudy sky)
- **erfsfc**: ERF at SFC (all sky)
- **erfsfcc**: ERF at SFC (clear sky)
- **erfsfca**: ERF at SFC (cloudy sky)
The script **stats.sh** has been used to compute the ERF.
Files
README.md
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