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

in #9: CCLM

<p> Hi all, </p> <p> 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? </p> <p> 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? </p> <p> Kind regards, </p> <p> Sam Vanden Broucke </p>

  @samvandenbroucke in #2d4ce97

<p> Hi all, </p> <p> 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? </p> <p> 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? </p> <p> Kind regards, </p> <p> Sam Vanden Broucke </p>

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

SV wrote

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

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

  @edmundmeredith in #c3a0019

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

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!

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<p> Okay, I’ll try that. Thanks for the quick reply Edmund! </p>

  @samvandenbroucke in #fafb351

<p> Okay, I’ll try that. Thanks for the quick reply Edmund! </p>
SV replied

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

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