Saqib Ahmad
New member
Hello Everyone,
I am currently working with WRF-Chem version 3.9.1, using the following inputs:
- Meteorological Forcing Data: ERA5 .
- Anthropogenic Emissions: EDGAR .
- Biogenic Emissions: MEGAN .
- Fire Emissions: FINN .
- Chemical Boundary Conditions: WACCM/CAM-Chem.
I am attaching my `namelist.input` and `rsl.error` files for reference.
Problem
I successfully ran the `wrf.exe` with the specified emission inventories and namelist, but I'm encountering an issue with the snow variables (SNOW, SNOWH). The snow cover changes hourly, which shouldn't happen since significant changes typically occur over daily or weekly intervals. After 4-5 hours of simulation, the snow cover completely disappears, only to reappear after 30 (at random intervals spatially) hours for another brief 4-5 hour period, then it vanishes again.
In the rsl files, I repeatedly see a message like: "temperature too high at i=33, j=21; resetting to 315K" and "par out of range at i= 77 ,j= 27 par =2602.896"for various i and j values. Since WRF assigns snowfall to precipitation when the temperature drops below 270K, I suspect this may be causing the snow to disappear. However, I'm unsure if this is the actual cause or how to resolve it. Could you help me address this issue?
Warm regards,
Saqib,
PhD Student,
IIT Madras,India
I am currently working with WRF-Chem version 3.9.1, using the following inputs:
- Meteorological Forcing Data: ERA5 .
- Anthropogenic Emissions: EDGAR .
- Biogenic Emissions: MEGAN .
- Fire Emissions: FINN .
- Chemical Boundary Conditions: WACCM/CAM-Chem.
I am attaching my `namelist.input` and `rsl.error` files for reference.
Problem
I successfully ran the `wrf.exe` with the specified emission inventories and namelist, but I'm encountering an issue with the snow variables (SNOW, SNOWH). The snow cover changes hourly, which shouldn't happen since significant changes typically occur over daily or weekly intervals. After 4-5 hours of simulation, the snow cover completely disappears, only to reappear after 30 (at random intervals spatially) hours for another brief 4-5 hour period, then it vanishes again.
In the rsl files, I repeatedly see a message like: "temperature too high at i=33, j=21; resetting to 315K" and "par out of range at i= 77 ,j= 27 par =2602.896"for various i and j values. Since WRF assigns snowfall to precipitation when the temperature drops below 270K, I suspect this may be causing the snow to disappear. However, I'm unsure if this is the actual cause or how to resolve it. Could you help me address this issue?
Warm regards,
Saqib,
PhD Student,
IIT Madras,India