Potential Temperature Perturbation method on WRF-LES

[n1o1o3n]

Hi

I'm wondering how "Potential Temperature Perturbation method" (introduced in the paper as follows) can be implemented in WRF.
I've seen some papers that mentioned and used the method on WRF-LES.

"Muñoz-Esparza, D., Kosović, B., Mirocha, J. et al. Boundary-Layer Meteorol (2014) 153: 409. https://doi.org/10.1007/s10546-014-9956-9"



By adopting the perturbation, WRF-LES seems to be able to produce resolved turbulences sufficiently,
which is usually difficult to be reproduced in simultaneous meso-microscale simulation with a nesting technique.

If it is true, it should be implemented by default in WRF and now I would like to use it.
Are there anyone who know the way?

Thank you for your help in advance.

Best,

 

[kwerner]

Hi,
WRF-LES is a different version of the WRF model that is developed and supported by a group at NOAA (https://www.esrl.noaa.gov/csd/staff/tak.yamaguchi/code/). You will need to contact their group for information on this system.

 

[n1o1o3n]

Thank you for your reply.

I meant WRF-LES is a real case Large-Eddy simulation by turning PBL scheme off,
especially I'm trying to carry out a simulation with direct nesting like YSU-YSU-LES (without ndown.exe).

In this case, the web site you kindly taught me is not what I wanted to do. This site and tool explain an ideal LES simulation without nesting.


Does anyone have ideas?

Thank you in advance.

 

[kwerner]

Hi,
Some of these problems are avoided with a large enough LES domain and several levels of 3:1 nests, down to the LES domain. Unfortunately, we do not have the code for the perturbations (given in the link you sent). It may be worthwhile to try to contact the authors for help with this. I'm sorry we can't be more help. It's possible that someone else on this forum may be able to help more though.