u and v components of wind - true east/north or model domain x/y direction? – in #9: CCLM

in #9: CCLM

Hi all,

Regarding the model output u and v components of wind, are they defined according to true east/north or according to the model domain x/y directions?

If the latter, I assume a correction is needed to true lon/lat direction when comparing to observed u/v measurements or observed wind direction, right?

Kind regards,

Sam Vanden Broucke

  @samvandenbroucke in #2d4ce97

Hi all,

Regarding the model output u and v components of wind, are they defined according to true east/north or according to the model domain x/y directions?

If the latter, I assume a correction is needed to true lon/lat direction when comparing to observed u/v measurements or observed wind direction, right?

Kind regards,

Sam Vanden Broucke

u and v components of wind - true east/north or model domain x/y direction?

Hi all,

Regarding the model output u and v components of wind, are they defined according to true east/north or according to the model domain x/y directions?

If the latter, I assume a correction is needed to true lon/lat direction when comparing to observed u/v measurements or observed wind direction, right?

Kind regards,

Sam Vanden Broucke

View in channel

The U and V components are defined wrt to the computational grid. You can de-rotate them using the CDO tool “rotuvb”. If de-rotating “manually” by the de-rotation formula, be careful that there may still be an error in the CCLM documentation. See this discussion https://redc.clm-community.eu/boards/10/topics/518
Good luck!

  @edmundmeredith in #c3a0019

The U and V components are defined wrt to the computational grid. You can de-rotate them using the CDO tool “rotuvb”. If de-rotating “manually” by the de-rotation formula, be careful that there may still be an error in the CCLM documentation. See this discussion https://redc.clm-community.eu/boards/10/topics/518
Good luck!

The U and V components are defined wrt to the computational grid. You can de-rotate them using the CDO tool “rotuvb”. If de-rotating “manually” by the de-rotation formula, be careful that there may still be an error in the CCLM documentation. See this discussion https://redc.clm-community.eu/boards/10/topics/518
Good luck!

Okay, I’ll try that. Thanks for the quick reply Edmund!

  @samvandenbroucke in #fafb351

Okay, I’ll try that. Thanks for the quick reply Edmund!

Okay, I’ll try that. Thanks for the quick reply Edmund!