Linking ERA5 netCDF Files

[kaitlinkitch]

Hello,

I am a new WRF user, and I am running WRF on Derecho. I have successfully ran my control simulation. For my test simulations, I will be perturbing the ERA5 sea surface temperatures by adding on the mean marine heatwave anomaly to the North Atlantic region of my WRF domain for a portion of the simulation. The marine heatwave anomalies I am using are dependent on the lat/lon point in the domain. I have already created the sea surface temperature fields I need to apply for the entire duration, but they are on a latitude/longitude grid. I am thinking the best way to apply these SST perturbations to run in my WRF simulations is to take the era5 data files for the duration of the simulation, replace the SSTs in the file with my perturbed SST field, and then link the netcdf files in the WPS process in place of linking in the grib files. What is the best way to link era5 netCDF files in? I have only ran WRF with grib files previously.

If there is another more efficient way to input my SSTs that are currently on a latitude longitude (not x-y) grid, I am open to all suggestions!

Thank you!

 

[Ming Chen]

I am thinking that you can use your own SST data as input to metgrid, and when you run metgrid.exe, these data will be remapped to WRF grids.

Please take a look at the document here, which might be helpful for your case.

 

[kaitlinkitch]

Okay great, thank you! So do I need to write my own intermediate files for my SST data from ERA5 and then link those files in with the others before running metgrid? I looked over some documentation on how to write intermediate files, but I am a bit confused on the formatting. Is there an example somewhere I could follow?

 

[Ming Chen]

Yes you can always write your own codes to process SST data.

Please see the document here, which describes how to write intermediate format data.