WRF-Chem simulations from the European Union's Horizon 2020 project EXHAUSTION, grant agreeement No 820655.

The simulations are described in the manuscript "Europe will struggle to meet the new WHO Air Quality Guidelines" by Im, Ye, Schuhen, Chowdhury, Christensen, Geels, Hanninen, Hodnebrog, Marelle, Sofiev, Brandt and Aunan, submitted to npj Clean Air.

Run and generated by Øivind Hodnebrog (oivind.hodnebrog@cicero.oslo.no) and Louis Marelle-Sebrechts (louis.marelle@latmos.ipsl.fr) at CICERO.

Five different experiments are contained in the five different folders
- EXHAUSTION_ERA5 - WRF-Chem run with ERA5 output from 1980-2014
- EXHAUSTION_HIST - WRF-Chem run with CESM2 BHIST output from 1980-2014
- EXHAUSTION_SSP126 - WRF-Chem run with CESM2 BSSP126 output from 2015-2050
- EXHAUSTION_SSP245 - WRF-Chem run with CESM2 BSSP245 output from 2015-2050
- EXHAUSTION_SSP370 - WRF-Chem run with CESM2 BSSP370 output from 2015-2050
All experiments have been downscaled to cover Europe

All experiment folders have one subfolder for each year. In each of there are files of various filetypes described below

########## Content of the subfolders per experiment per year: ##########

-	There is one subfolder for each year, containing the following files:
o	wrfout_d01_YYYY-MM_inst.nc: Monthly average fields for many variables.
o	wrfout_d01_YYYY-MM-01_accu.nc: Monthly output of accumulated variables (e.g., precipitation).
o	wrfout_d01_YYYY-MM-DD_hrly.nc: Hourly output of the several variables. 
o	wrfout_d01_YYYY-MM-DD_hrly_sfc.nc: Hourly output of the lowermost level value for several variables. 
o	wrfout_d01_YYYY-MM-DD_prec.nc: Hourly precipitation (note that this is given as accumulated and not instantaneous).
o	wrfxtrm_d01_YYYY-MM-DD_ HH:MM:SS: Contains variables relevant for extreme analysis at daily temporal resolution (e.g., T2MIN and T2MAX).
o	wrfrst_d01_YYYY-MM-DD_HH:MM:SS: Restart files


 # File with names ending in _hrly.nc:
 Daily files with hourly output for many variables. These are mostly 2D variables, but ozone (“o3”) and PM2.5 (“PM2_5_DRY”) are included here for the three lowermost vertical layers.

 # Files with names ending in _hrly_sfc.nc
Daily files with hourly output of several gas/aerosol components. These are 3D variables, but extracted for the lowermost layer only.

# Files with names ending in _prec.nc
Daily files with hourly output of precipitaiton (convective and non-convective over the preceding hour)

# Files with names ending in _inst.nc
Monthly files with monthly instantaneous means (for variables like temperature that are instantaneous)
XLAT/XLONG gives the lat/lon coordinates for the center of the grid boxes.

# Files with names ending in _accu.nc:
 Monthly files with monthly accumulated data (for variables that are accumulated such as precipitaiton)

# Files beginning with wrfrst:
Restart files 

# Files beginning with wrfxtrm:
Files with extreme daily values from the whole timeperiod of the run (from restart to restart),
i.e. if the one particular run went from January 1st 1980 to November 11th 1980 before outputting and automatically restarting
this file will have the daily maximum and minimum temperature etc for each of the days in this interval

# Note on grid resolution
 *_hrly.nc and *_hrly_sfc.nc files have fewer grid boxes than the other files (124x103 instead of 144x123). In these the outer bondary of 10 grid boxes around the domain has been removed, because results in the outermost grid boxes usually cannot be trusted. In the top folder for each experiment there are grid files that define both this reduced grid and the total grid

##########################################################################

Note that spinup has been done on the last three months of the preceding year, except for year 1980 (this concerns the ERA5 and HIST experiments)

Note also that the EXHAUSTION_ERA5 folder contains two grid files wrfout_d01_grid_reduced.nc and wrfout_d01_grid_full.nc containing grid information for the reduced grid (for *_hrly.nc and *_hrly_sfc.nc files) and the full grid (for all other files).