Opened 11 years ago

Closed 9 years ago

#279 closed help (fixed)

vn4.5 Lam ancillarc creation

Reported by: ggxjd Owned by: um_support
Component: UM Model Keywords: ancillary file
Cc: Platform:
UM Version: 4.5

Description

Hi there,
I'm wondering how I can make a full set of ancillary files for a new domain for the LAM vn4.5.

Using the NCAS ancillary file service I have obtained fields i can use for the mask, orography, qrclim.smow, sst and ice. However as the files created are for a vn6.1 some files are not suitable for my uses.

I need a qrparm.soil for MOSES 1 and qrparm.veg which are suitable for the version I'm using. Can anyone help me with how to make these? Is there some available algorithm and data from which these fields are calculated?

Cheers
Jonny

Change History (4)

comment:1 in reply to: ↑ description Changed 11 years ago by grenville

Replying to ggxjd:

Hi there,
I'm wondering how I can make a full set of ancillary files for a new domain for the LAM vn4.5.

Using the NCAS ancillary file service I have obtained fields i can use for the mask, orography, qrclim.smow, sst and ice. However as the files created are for a vn6.1 some files are not suitable for my uses.

I need a qrparm.soil for MOSES 1 and qrparm.veg which are suitable for the version I'm using. Can anyone help me with how to make these? Is there some available algorithm and data from which these fields are calculated?

Cheers
Jonny

Jonny

There are a couple of avenues to pursue; I have access to the old ancillary file code which will generate veg and soil files for MOSES 1, but the old code was limited in the areas it could handle and suffered from problems associated with being a 32 bit application; we can try to use the PRECIS system to get the ancillaries. I need to consult with PRECIS experts about the later.

Please tell me the domain you are interested in (or point me to the appropriate directory on PUMA).

Can you move to a higher version of the UM?

Grenville

comment:2 Changed 11 years ago by ggxjd

Hi Grenville,
I've put a file in my home dir on PUMA called svalbard_4425_grid.nc. This is the domain I wish to have ancil files for. It should be centered on Svalbard. I made it using the BADC grid display utility with the following inputs:

Number of rows: : 132
Number of columns: : 229
First latitude: : -26.30
First longitude: : 313.86
Rotated pole latitude: : 11
Rotated pole longitude: : 198
Latitude spacing: : 0.4425
Longitude spacing: : 0.4425

This is however not the only domain I'll need to make files for. I'll want to do a higher resolution set 0.22 degree over Svalbard nested within this experiment.

I don't think moving to a higher version of the um is an option logistically.

Cheers
Jonny

comment:3 Changed 11 years ago by ros

  • UM Version set to 4.5

comment:4 Changed 9 years ago by lois

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

CAP for UM version 4.5 is available on the NCAS CMS web page

Note: See TracTickets for help on using tickets.