Recently, I used uvmet from WRF-Python to extract the U and V components of wind velocity. However, when I extracted the composite wind speed from uvmet_wspd_wdir, I found that the wind speed calculated using the U and V components differed significantly from the directly extracted wspd values. I checked the source code of the relevant library, and it showed the method I used is consistent with the implementation. I'm not sure what key factors I might have overlooked.![chrome_9njoAvRqJp.png chrome_9njoAvRqJp.png](https://forum.mmm.ucar.edu/data/attachments/10/10618-30a4fc950094f5548ce5264cb56d41b8.jpg)
![Code_OvjIMfFhFo.png Code_OvjIMfFhFo.png](https://forum.mmm.ucar.edu/data/attachments/10/10619-9f0d9e019873e2f8dbf87eaed104ce51.jpg)
![chrome_9njoAvRqJp.png chrome_9njoAvRqJp.png](https://forum.mmm.ucar.edu/data/attachments/10/10618-30a4fc950094f5548ce5264cb56d41b8.jpg)
![Code_OvjIMfFhFo.png Code_OvjIMfFhFo.png](https://forum.mmm.ucar.edu/data/attachments/10/10619-9f0d9e019873e2f8dbf87eaed104ce51.jpg)