Hello,
I am running WRFv3.9.1.1 over Greenland. D01 is all of Greenland plus surrounding oceans, D02 is NE Greenland, and D03 is quite specific to the NE coast around 79N. For this reason, accurate sea ice is crucial. i have no problems running wrf when fractional_seaice = 0. But as soon as I switch fractional_seaice = 1, the model crashes after the first few seconds. There are huge instabilities in my surface variables such as T2 and 10m winds. I have output wrf at every minute, and after the first timestep the output is white everywhere, starting at the edge of my domain. I have uploaded some photos.
I have tried with many different and very small timesteps (see namelist), and I have tried many smoothing and damping options (epssm, w_damping, smoothing etc). I always get a sigsegv fault when inc/HALO_CUP_G3_IN_inline.inc is called. However this isn't where the problems begin, as this is after 5minutes of model time, but the 'white' instabilities start before this. I have attached rsl.error0000.
My input data is definitely fractional sea ice. I have tried 2 different sources of data but both crash at the same time. I have edited the metgrid.tbl so that the landmask is used rather than landsea. The input data looks good, and the model runs to completion if I simply remove fractional_seaice = 1 from my namelist. Similarly, real.exe runs to completion, and the wrfinput and wrflowinp files look reasonable.
I have tried many different tactics, but to no avail. I am now configuring with -d option to see if this provides more insight. I already have debug level set to 1000. As fractional sea ice has been a feature for a while, and I can see no forum thread about it (and many published papers), I assume that this is something that can easily be fixed, or something that is staring me in the face, but I just can't see it.
I should also note that I am using Polar WRF v 3.9.1, but I have also tried without using PWRF, and just regular wrf, and the same problem arises.
Any help is much appreciated.
I am running WRFv3.9.1.1 over Greenland. D01 is all of Greenland plus surrounding oceans, D02 is NE Greenland, and D03 is quite specific to the NE coast around 79N. For this reason, accurate sea ice is crucial. i have no problems running wrf when fractional_seaice = 0. But as soon as I switch fractional_seaice = 1, the model crashes after the first few seconds. There are huge instabilities in my surface variables such as T2 and 10m winds. I have output wrf at every minute, and after the first timestep the output is white everywhere, starting at the edge of my domain. I have uploaded some photos.
I have tried with many different and very small timesteps (see namelist), and I have tried many smoothing and damping options (epssm, w_damping, smoothing etc). I always get a sigsegv fault when inc/HALO_CUP_G3_IN_inline.inc is called. However this isn't where the problems begin, as this is after 5minutes of model time, but the 'white' instabilities start before this. I have attached rsl.error0000.
My input data is definitely fractional sea ice. I have tried 2 different sources of data but both crash at the same time. I have edited the metgrid.tbl so that the landmask is used rather than landsea. The input data looks good, and the model runs to completion if I simply remove fractional_seaice = 1 from my namelist. Similarly, real.exe runs to completion, and the wrfinput and wrflowinp files look reasonable.
I have tried many different tactics, but to no avail. I am now configuring with -d option to see if this provides more insight. I already have debug level set to 1000. As fractional sea ice has been a feature for a while, and I can see no forum thread about it (and many published papers), I assume that this is something that can easily be fixed, or something that is staring me in the face, but I just can't see it.
I should also note that I am using Polar WRF v 3.9.1, but I have also tried without using PWRF, and just regular wrf, and the same problem arises.
Any help is much appreciated.