I am very new to using WRF, and am currently doing a lot of exploring and experimentation. My goal is to essentially do spatial downscaling of windspeed data for a single timestep. I am only interested in spatial scaling, not temporal scaling.
This is the setup I have in mind, does it make sense?
- Use a single GFS input gribfile forecast that has the coarse spatial wind data I am interested in downscaling. For example a 6 hour forecast from 2024_01_01_00:00.
- Configure namelist.wps and namelist.input with the start and end datetimes all being the same datetime of the gribfile (2024_01_01_00:00)
- Create two domains, where the child domain has my desired parent_grid_ratio, 3, for example
My questions are related to setting up the start_date and interval:
1. Since I am interested in spatial downscaling (not time downscaling) how do I set interval_seconds in my namelist files? I only have one input gribfile for my single timestep, so there is no interval between my input data.
2. For my example input gribfile, which is a 6 hour forecast initialized at 2024_01_01_00:00, would my start datetime be 2024_01_01_00:00, with my end datetime being 2024_01_01_06:00, because I have a 6 hour forecast? Or would the start and end datetime both be 2024_01_01_00:00 (which is the forecast initialization time) because I am not downscaling in time?
I appreciate any advice and I am happy to provide clarification if needed, thanks!
This is the setup I have in mind, does it make sense?
- Use a single GFS input gribfile forecast that has the coarse spatial wind data I am interested in downscaling. For example a 6 hour forecast from 2024_01_01_00:00.
- Configure namelist.wps and namelist.input with the start and end datetimes all being the same datetime of the gribfile (2024_01_01_00:00)
- Create two domains, where the child domain has my desired parent_grid_ratio, 3, for example
My questions are related to setting up the start_date and interval:
1. Since I am interested in spatial downscaling (not time downscaling) how do I set interval_seconds in my namelist files? I only have one input gribfile for my single timestep, so there is no interval between my input data.
2. For my example input gribfile, which is a 6 hour forecast initialized at 2024_01_01_00:00, would my start datetime be 2024_01_01_00:00, with my end datetime being 2024_01_01_06:00, because I have a 6 hour forecast? Or would the start and end datetime both be 2024_01_01_00:00 (which is the forecast initialization time) because I am not downscaling in time?
I appreciate any advice and I am happy to provide clarification if needed, thanks!