Ruben Borgers in #8: General Questions on June 02 (#48c7638)

in #8: General Questions

<p> Hello Rolf, </p> <p> thanks a lot for your reply. </p> <p> I agree that if all input data (both the external parameter fields ánd the boundary conditions) are specified in WGS84 and the model does not convert any of this to spherical and takes them as is, then all data sources still match and there is not too much to worry about. But for that I would need to get some more information on what happens in EXTPAR and INT2LM. </p> <p> I currently use the CCLM-ready ERA5 data on Levante for my simulations. If it turns out that the data is not converted to spherical, then I can directly compare all my WGS84 data directly to CCLM data, or simply add any WGS84 data field to the initial conditions without any conversions (which we do for our wind farm simulations). </p> <p> I also encountered this publication which indeed highlights this issue. So it's quite important to find out that all data is indeed preprocessed in a consistent way. </p> <p> Can someone shed some light on this? Thanks in advance! </p> <p> Kind regards, <br/> Ruben </p>

  @rubenborgers in #f7348c8

<p> Hello Rolf, </p> <p> thanks a lot for your reply. </p> <p> I agree that if all input data (both the external parameter fields ánd the boundary conditions) are specified in WGS84 and the model does not convert any of this to spherical and takes them as is, then all data sources still match and there is not too much to worry about. But for that I would need to get some more information on what happens in EXTPAR and INT2LM. </p> <p> I currently use the CCLM-ready ERA5 data on Levante for my simulations. If it turns out that the data is not converted to spherical, then I can directly compare all my WGS84 data directly to CCLM data, or simply add any WGS84 data field to the initial conditions without any conversions (which we do for our wind farm simulations). </p> <p> I also encountered this publication which indeed highlights this issue. So it's quite important to find out that all data is indeed preprocessed in a consistent way. </p> <p> Can someone shed some light on this? Thanks in advance! </p> <p> Kind regards, <br/> Ruben </p>
RB replied

Hello Rolf,

thanks a lot for your reply.

I agree that if all input data (both the external parameter fields ánd the boundary conditions) are specified in WGS84 and the model does not convert any of this to spherical and takes them as is, then all data sources still match and there is not too much to worry about. But for that I would need to get some more information on what happens in EXTPAR and INT2LM.

I currently use the CCLM-ready ERA5 data on Levante for my simulations. If it turns out that the data is not converted to spherical, then I can directly compare all my WGS84 data directly to CCLM data, or simply add any WGS84 data field to the initial conditions without any conversions (which we do for our wind farm simulations).

I also encountered this publication which indeed highlights this issue. So it's quite important to find out that all data is indeed preprocessed in a consistent way.

Can someone shed some light on this? Thanks in advance!

Kind regards,
Ruben

View in channel