latent heat nudging (LHN) using 3DVAR

[imaiello_1983]

Dear all,

I have a question:
is the LHN implemented into WRF/WRFDA?

I should have assimilate using WRF-3DVAR the vertical profile of latent heat retrieved from radar or rainfall data.
So I have to main problems:

1) probably write an algorithm to retrieve the vertical profile of latent heat from radar or rainfall data
2) and then, assimilate this profile into WRF-3DVAR.

I know that there is both a spectral nudging and an observation nudging into WRF,
could they help me?

I hope in your answer,
best regards
Ida Maiello

 

[lkugler]

Hi Ida,
I have not seen an open-source LHN algorithm for WRF so far, but HRRR seems to have one (as described here: https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/qj.3179).

Best regards,
Lukas

 

[imaiello_1983]

Dear Lukas,

thank you so much for your response and for suggesting a very interesting article for me involved into radar data assimilation for 10 years!

Do you know something about FDDA (four-dimensional data assimilation), also know as nudging, implemented into WRF?

https://nar.ucar.edu/2018/ral/real-time-four-dimensional-data-assimilation-rtfdda-and-forecasting-advances


Best regards,
Ida

 

[JakeLiu]

Any nudging is done through model integration, not in 3DVAR.
Jake