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| 1d_and_3d_atmospheric_data [2012/08/10 23:54] – [Temperature and Humidity Field becomes unstable] marenlie | 1d_and_3d_atmospheric_data [2017/11/10 09:09] – external edit 127.0.0.1 | ||
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| ==== Temperature and Humidity Field becomes unstable ==== | ==== Temperature and Humidity Field becomes unstable ==== | ||
| This is either a result of a bad wind field with too high divergence ([[calculate wind field for 10 sec|see here]]) or it is a general numerical problem. \\ | This is either a result of a bad wind field with too high divergence ([[calculate wind field for 10 sec|see here]]) or it is a general numerical problem. \\ | ||
| - | If it seems to be a general numerical model, decrease the time step of your model ([[timesteps|see here]]) | + | If it seems to be a general numerical model, decrease the time step of your model ([[timesteps|see here]]). |
| Also, you should have a look at the PANIC DUMP ENVI-met has produced. It is a set of normal [[Output Files]] except that is was written outside the usual save interval. Surf through the file and try to discover the spot where the problem is caused. Normally the point of trouble is quite visible due to unrealistic high and/or low values: Consider to modify this area slightly. \\ | Also, you should have a look at the PANIC DUMP ENVI-met has produced. It is a set of normal [[Output Files]] except that is was written outside the usual save interval. Surf through the file and try to discover the spot where the problem is caused. Normally the point of trouble is quite visible due to unrealistic high and/or low values: Consider to modify this area slightly. \\ | ||
| Sometimes it helps to change the inflow direction of the wind a few degrees. This does not actually effect the model results much but might help in case of numerical problems. | Sometimes it helps to change the inflow direction of the wind a few degrees. This does not actually effect the model results much but might help in case of numerical problems. | ||
| - | ==== Problems with sources | + | ==== Problems with Sources |
| - | Unrealistic jumps in the [[sources emission]] | + | Unrealistic jumps in the [[sources|sources emission |
| ==== Problems with CO2 ==== | ==== Problems with CO2 ==== | ||
| - | If you area contains a huge amount of vegetation, problems with the internal CO2 system might occur. In this case, go to the [[Advanced Settings Panel]] and enable the option "**Use small time steps for CO2 model**" | + | If you area contains a huge amount of vegetation, problems with the internal CO2 system might occur. In this case, go to the [[advanced settings|Advanced Settings Panel]] and enable the option "**Use small time steps for CO2 model**" |