Scheduled Downtime
On Friday 21 April 2023 @ 5pm MT, this website will be down for maintenance and expected to return online the morning of 24 April 2023 at the latest

WRF Ensemble technique

syyang

New member
I'm looking for an ensemble technique, and I remember using it in other numerical models and I think it was also used in WRF, but I'd like to know the specific method.

This is a method of using the effects of multiple physics processes in one experiment.
Once dynamics is performed, it then enters the physics loop and uses multiple physics at the same time.

For example, if i select multi microphysics, after completing the mechanics course, model calculate radiation, calculate ground, PBL, etc., and when calculating clouds, model calculate various methods such as WSM6, WSM5, WDM6, WDM5, Thompson, P3, etc. and save the results separately.
This is a method of averaging the results from each method when the cloud calculation is finished and moving on.
This method produces one output with one namelist set.

Due to limitations in computational resources, I am looking for a method that performs the above with a single set rather than other ensemble techniques that perform multiple sets. Has anyone tried this method?

If anyone knows how to do it please let me know
 
@William.Hatheway
@syyang

I found this post from @kwerner in the FAQ section that might help.



Thank you for the information you provided.

However, this appears to be an ensemble method that uses two input data from WRF.

What I want is not an input data ensemble technique, but a physics ensemble technique inside the model.
 
@syyang
Many apologies for the very delayed response. We have been occupied with several other deadlines and have gotten behind in our responses. The only built-in method that is similar to running WRF ensembles is the Stochastic Parameterization Scheme. Take a look at this section of the WRF Users' Guide (and scroll down just a bit until you get to the "Stochastic Parameterization Scheme" section. You may also find this document to be useful.
 
Top