parhelion2
New member
Hi all,
For my case study, I ran multiple WRF simulations using different microphysics schemes with lightning_option = 1 (PR92 updraft-based). However, the results show "invisible lines" dividing the domain, making the output look unrealistic (see cell_count_method_1.png, it shows the accumulated flash count for 24 hours). I tried the same simulations for another day and the pattern problem looks even more intense on that day (see second_case_study.png (label cell2 stands for cellcount_method =2)).
I suspect this is related to parameter cellcount_method, which I initially set to 1 (tile-by-tile calculation). The pattern that can be seen in my simulations look like a tile pattern, but I’m unsure how WRF defines these tiles and if they match my results. I haven't found similar cases in the literature.
To test this, I reran simulations with cellcount_method = 2 for two microphysics schemes. This removed the pattern (cellcount_method_2.pdf — label hope stands for cellcount_method =2), but the total flash count was significantly lower and deviated more from observations, so I'm hesitating to use this option.
Has anyone encountered this issue? Any insights on how the WRF lightning option defines tiles or alternative solutions? Or is there a problem in my namelist?
I would appreciate any help!
Sina
For my case study, I ran multiple WRF simulations using different microphysics schemes with lightning_option = 1 (PR92 updraft-based). However, the results show "invisible lines" dividing the domain, making the output look unrealistic (see cell_count_method_1.png, it shows the accumulated flash count for 24 hours). I tried the same simulations for another day and the pattern problem looks even more intense on that day (see second_case_study.png (label cell2 stands for cellcount_method =2)).
I suspect this is related to parameter cellcount_method, which I initially set to 1 (tile-by-tile calculation). The pattern that can be seen in my simulations look like a tile pattern, but I’m unsure how WRF defines these tiles and if they match my results. I haven't found similar cases in the literature.
To test this, I reran simulations with cellcount_method = 2 for two microphysics schemes. This removed the pattern (cellcount_method_2.pdf — label hope stands for cellcount_method =2), but the total flash count was significantly lower and deviated more from observations, so I'm hesitating to use this option.
Has anyone encountered this issue? Any insights on how the WRF lightning option defines tiles or alternative solutions? Or is there a problem in my namelist?
I would appreciate any help!
Sina