How to prepare crop data for WRF_NoahMP outside US?

[xiao.zh]

Hello everyone, I am currently using WRF_NoahMP to conduct irrigation experiments. Since my case is not in the United States, I need to prepare the crop data myself. My process is as follows:
1. I have 1km planting data for three types of crops, using this data to calculate the crop fraction in a 5km window.
2. Expand the proportions by ten thousand times, convert them to integers, replace missing values with -9999, set the scale factor to 0.0001, and obtain a tif with 5 bands.
3. Use gdal to convert this tif into a binary file and prepare the index file.
4. Replace the croptype folder in the downloaded static geographic data.
5. Run the geo_grid program.
Currently, the geo_em_d01.nc file I generated contains new croptype data, but these data have negative values, which should not be the case. This indicates that there are issues with my steps 1 and 2.
Of course, I can directly modify the data in geo_em_d01 based on the crop fraction data. However, I am considering completing the modifications to the static data so that future plans can use it directly, which would be more convenient.
Any suggestions and opinions are very welcome. Looking forward to your response, thank you.

Xiao

 

[Dipson11]

hey xiao , I am not sure ,but did you put "missing_value = 0" in your geogrid.tbl which treats 0 as no data or whatever is your case.

https://www2.mmm.ucar.edu/wrf/users/tutorial/presentation_pdfs/202101/duda_wps_advanced.pdf

 

[Ming Chen]

Our expert who works on crop module left years ago. We actually have trouble to make it work from the beginning.
Would you please contact Mike Balarge to seek more information?

 

[xiao.zh]

hey xiao , I am not sure ,but did you put "missing_value = 0" in your geogrid.tbl which treats 0 as no data or whatever is your case.

https://www2.mmm.ucar.edu/wrf/users/tutorial/presentation_pdfs/202101/duda_wps_advanced.pdf

Hi, thanks for your reply. I did not set "missing_value = 0" in geogrid.tbl. I directly modified the data in geo_em_d01 and worked. I will try your suggestion later.

 

[xiao.zh]

Our expert who works on crop module left years ago. We actually have trouble to make it work from the beginning.
Would you please contact Mike Balarge to seek more information?

Hi Ming, thanks for your reply. I will try to contact Mike Balarge.