Changing the temperature field and pressure field

[Yuchen Kang]

Hi, I'm having some big problems with editing temperature and pressure field. I'm willing to do so because the initial vortex I implemented creates a significant unbalanced wave pattern at the early stage, as shown in the plot. This is different from the gravity wave that generated normally as in nature world, and I'm seeking ways of eliminating it. A common way is to wait long enough for it to dissipates on its own, but as I'm working on genesis stage I cannot do it. I find several papers mentioning "setting the initial field to dynamically and thermodynamically balanced according to thermal wind and geostrophic wind balance, but when I'm trying to follow them, I find it necessary to edit the temperature and pressure field, which both seem to be diagnostic variables and cannot be edit in the initial condition, wrfinput. I'm thus willing to know if there's methods to accomplish my goal of setting a balanced initial field.

 

[Ming Chen]

Technically, temperature and pressure can be modified in wrfinput file. Python and NCL are convenient tools to do so.
The essential issue for your case is that you need to figure out how to set a balanced initial field before you can modify the two variables.

 

[Yuchen Kang]

Technically, temperature and pressure can be modified in wrfinput file. Python and NCL are convenient tools to do so.
The essential issue for your case is that you need to figure out how to set a balanced initial field before you can modify the two variables.

Hi, I'm not sure what's the variable name I can edit. I know that sea surface temperature can be edited using TSK, but I have tried making edition to "T" and "initial_T", but none of these editions show any changes: I increase the wrfinput whole lower level potential temperature by 30°, but as soons as simulation starts, the low level potential temperature jumps back to the normal value. Same for pressure field, I'm not sure which variable I should edit.

 

[icastorm]

Hi, I'm not sure what's the variable name I can edit. I know that sea surface temperature can be edited using TSK, but I have tried making edition to "T" and "initial_T", but none of these editions show any changes: I increase the wrfinput whole lower level potential temperature by 30°, but as soons as simulation starts, the low level potential temperature jumps back to the normal value. Same for pressure field, I'm not sure which variable I should edit.

Bumping this because I am also running into a similar problem. While modifying 'T' in the wrfinput file has worked in the past, we are finding that the temperature field changes are not sticking by the time the first output file is written.

 

[Yuchen Kang]

Technically, temperature and pressure can be modified in wrfinput file. Python and NCL are convenient tools to do so.
The essential issue for your case is that you need to figure out how to set a balanced initial field before you can modify the two variables.

Hi, it seems like other people meet similar problem as me, especially on the "edition of temperature field".

 

[Yuchen Kang]

Technically, temperature and pressure can be modified in wrfinput file. Python and NCL are convenient tools to do so.
The essential issue for your case is that you need to figure out how to set a balanced initial field before you can modify the two variables.

Hi, this is an issue that relates to my "balancing my initial field". Temperature field and pressure field both need to be edited to follow the gradient wind balance and thermal wind balance, but as temperature cannot be edited now I am not able to reach the balanced field.