Hello all,
I am a paleoclimate modeller at Stockholm University and I have been using CESM1.2-CAM4 with recent (~Pliocene - Miocene) and older (Cretaceous) geographies with success over the last two years. Recently, I have prepared a late Permian simulation (~250 million years ago, so a tremendous change of land-sea mask), but the model crashes at initialisation with an error I have not seen before, and for once I cannot find any obvious problem in my boundary files.
The error is the following:
ERROR: **** ZM_CONV IENTROPY: Tmix did not converge ****
ZM_CONV: IENTROPY. Details: call#,lchnk,icol= 2 329 8 lat: 54.00 lon: 62.50 P(mb)= 37.23 Tfg(K)= 180.10 qt(g/kg) = 0.00 qst(g/kg) = NaN, s(J/kg) = Inf
Since my model does not even start, I assume the issues is somehow related to the boundary conditions, also since I did not experience problems before even on early Cretaceous geographies, which are also quite a big change in land-sea mask. The error seems to indicate a point in latitude = 54° and longitude = 62.5°, which is the location of 5-km high mountains in my geography.
I have tried the following change without any impact on the problem:
- Decreasing the atmospheric time step of CAM4
- Lowering the initial, non-continental forcing (solar, CO2)
- Lowering all mountains from 5 km to 4.5 km
Thanks for helping!
I am a paleoclimate modeller at Stockholm University and I have been using CESM1.2-CAM4 with recent (~Pliocene - Miocene) and older (Cretaceous) geographies with success over the last two years. Recently, I have prepared a late Permian simulation (~250 million years ago, so a tremendous change of land-sea mask), but the model crashes at initialisation with an error I have not seen before, and for once I cannot find any obvious problem in my boundary files.
The error is the following:
ERROR: **** ZM_CONV IENTROPY: Tmix did not converge ****
ZM_CONV: IENTROPY. Details: call#,lchnk,icol= 2 329 8 lat: 54.00 lon: 62.50 P(mb)= 37.23 Tfg(K)= 180.10 qt(g/kg) = 0.00 qst(g/kg) = NaN, s(J/kg) = Inf
Since my model does not even start, I assume the issues is somehow related to the boundary conditions, also since I did not experience problems before even on early Cretaceous geographies, which are also quite a big change in land-sea mask. The error seems to indicate a point in latitude = 54° and longitude = 62.5°, which is the location of 5-km high mountains in my geography.
I have tried the following change without any impact on the problem:
- Decreasing the atmospheric time step of CAM4
- Lowering the initial, non-continental forcing (solar, CO2)
- Lowering all mountains from 5 km to 4.5 km
Thanks for helping!