Hi, I was trying to do a nested run for 48 hours, by including a sst input, which updates every one hour. All the details are mentioned in the namelist.input file. The model runs for around 17 hours and then crashes, giving segmentation fault. There is no violation of cfl condition and the memory of the disk is fine. I have attached the error file where it shows segmentation fault. I have gone through the segmentation error query (Segmentation Faults and CFL Errors) , but not been able to identify the issue. I have also ran the model for a slightly larger timestep of 108 sec (4x27km domain) but it gives the error of mismatched timestep for sst input files after 12 hours.
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segmentation fault
- Thread starter samudra
- Start date
Hi,
Your namelist.input looks fine to me except that
(1) time step is way too small. Please change it to time_step = 150
(2) let's keep radiation the same by setting radt = 15, 15
(3) I am not sure whetehre your domain is located. If the topography is high, please increase epssm to a larger value (e.g. 0.6)
In addition, I am not sure why you need to update SST at hourly interval? Can you run a test with turning off sst_update?
Your namelist.input looks fine to me except that
(1) time step is way too small. Please change it to time_step = 150
(2) let's keep radiation the same by setting radt = 15, 15
(3) I am not sure whetehre your domain is located. If the topography is high, please increase epssm to a larger value (e.g. 0.6)
In addition, I am not sure why you need to update SST at hourly interval? Can you run a test with turning off sst_update?
This suggests that your SST update may be problematic. If you need to run with sst_update, please follow the instruction to create wrflowinp file. Details can be found at https://www2.mmm.ucar.edu/wrf/users/docs/user_guide_v4/v4.0/users_guide_chap5.html#sst_update
Let me know if you have any issues when creating the sst update.
Let me know if you have any issues when creating the sst update.
I am running the sst_update runs, and will let you know once its done.
I do have a general question regarding runs. If I want to do a perturbation experiment, where i change the wind patterns at upper levels (500 hPa and above) to some other day values, forcing it at hourly timstep, or maybe increase the wind values at each gridpoint by some factor, how can it be done? Do i need to change the input files itself before getting the internediate files? Also, i think the model might break because of the continuity itself not been satisfied, but if so, then is there a way to work out such experiments in WRF? My overall goal in to understand the sensitivity of large scale winds on storm tracks.
I do have a general question regarding runs. If I want to do a perturbation experiment, where i change the wind patterns at upper levels (500 hPa and above) to some other day values, forcing it at hourly timstep, or maybe increase the wind values at each gridpoint by some factor, how can it be done? Do i need to change the input files itself before getting the internediate files? Also, i think the model might break because of the continuity itself not been satisfied, but if so, then is there a way to work out such experiments in WRF? My overall goal in to understand the sensitivity of large scale winds on storm tracks.