Opened 11 years ago

Closed 11 years ago

#440 closed help (fixed)

creating new orography ancillary files

Reported by: anmcr Owned by: willie
Component: Data Keywords: orography ancillary
Cc: Platform:
UM Version: 6.1


Dear Grenville,

BAS has a 'true' high-resolution (200 m horizontal resolution) orography and land-sea mask dataset. As you might expect this shows considerable differences with the UM mean orography ancillary.

I therefore want to compute new orography ancillaries for LAM domains over regions of Antarctica using this dataset. I am aware of the Webster et al. paper and UM document 74 which explains the creation of orography ancillaries. I have also emailed Stuart Webster but haven't heard back from yet.

I was wondering if you could offer any support with this? If for example I sent you the dataset would you be able to use the MetOffice? software to create the ancillaries. Naturally the one I want to get correct is the mean orography which requires to be filtered to remove small grid-scale features.

I know you are very busy, but any help would be greatly appreciated.



Change History (2)

comment:1 Changed 11 years ago by anmcr

Dear Willie,

Stuart Webster send me a further email helping with the smoothing. It's all a lot easier than I imagined — so hopefully I won't be needing either your or Grenville's help.

Please close this ticket.



comment:2 Changed 11 years ago by willie

  • Resolution set to fixed
  • Status changed from new to closed
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