Hi,
I have recently generated a set of simulations with WRF in LES mode including a tracer for methane.
I have followed the detailed documentation from other colleagues e.g. Brian Blaylock, UofU
I successfully run the simulations and got results such as mass growth and concentration maps:


But I calculated the methane flux rates and were not exactly matching what I was expecting.
After a while, I discovered that when I zoom in the initial 5 minutes of the simulation are non linear (red shows ideal vs blue actual trend).

There is no apparent explanation for this non-linear mass growth (in those initial minutes the plume is inside the domain) and I thought about inconsistencies in the temporal interpolation or similar numerical issues.
I attach an example of the namelist file in case you have some ideas and can help me with this issue.
Thanks in advance
Javier Gorroño
I have recently generated a set of simulations with WRF in LES mode including a tracer for methane.
I have followed the detailed documentation from other colleagues e.g. Brian Blaylock, UofU
I successfully run the simulations and got results such as mass growth and concentration maps:


But I calculated the methane flux rates and were not exactly matching what I was expecting.
After a while, I discovered that when I zoom in the initial 5 minutes of the simulation are non linear (red shows ideal vs blue actual trend).

There is no apparent explanation for this non-linear mass growth (in those initial minutes the plume is inside the domain) and I thought about inconsistencies in the temporal interpolation or similar numerical issues.
I attach an example of the namelist file in case you have some ideas and can help me with this issue.
Thanks in advance
Javier Gorroño