WRF Greenhouse Gases (GHG) concentration files

These are scripts to retrieve and create CMIP6 Shared Socioeconomic Pathways (SSP) GHG concentration files for use in the Weather Research & Forecasting (WRF) modelling system. New CAMtr_volume_mixing_ratio.SSP* files were generated following the SSPs used in CMIP6 scenarioMIP simulations. This files allow for a consistent GHG concentration in the driving CMIP6 GCM fields and a nested WRF climate simulation.

Input4MIPs provides forcing data sets for CMIP6 through the Earth System Grid Federation (ESGF). For GHG forcing, the data is also made available through a University of Melbourne server (https://greenhousegases.science.unimelb.edu.au), which provides access to easily parseable CSV files. We made use of global average files from this source, using versions v1.2.0 (historical) and v1.2.1 (scenario). Note that hemispheric and 30-degree-resolution files are also available.

This is a comparison (see plot_CAMtr_files.py) of the new SSP files created and the some of the existing concentration pathways (RCPs) files, as retrieved from WRF v4.2.2:

Acknowledgement: This work is partially funded by the CORDyS project (PID2020-116595RB-I00) funded by the Spanish National Research Agency (AEI).