NCAS
Unified Model Introduction
Part 4a: UM tools and facilities
University of Reading, 3-5 December 2014
File formats
UM Tools should provide a full range of input and output format
possibilities
GRIB
GRIB
ASCI
ASCI
UM
UM
UM
netcdf
netcdf
PP
PP
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Conversion tools
GRIB
ECMWF data
GRIB
Metview
DECODE
Fortran
reconfiguration
convpp
64-bit PP
Model
64-bit UM
fftopp
wconv.pl
netcdf IDL/
Fortran
pptoanc
xconv
convpp
32-bit
um32to64
64-bit PP
ieee
32-bit PP
(from UKMO)
32-bit PP
Met Office graphics
32-bit UM
netcdf
Python, idl
Ferret, Grads
cdat
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UM tools (i)
Data conversion
Tool
Input
Output
pptoanc
PP
UM (ancillary)
xancil
netCDF
UM (ancillary)
convpp
UM
PP
ff2pp
UM (fields format)
32-bit PP
ieee
UM
32-bit UM
bigend
UM
byte-swapped UM
xconv
UM and PP
netcdf
cf-python
PP
CF-netcdf
All tools and output 64-bit unless otherwise stated
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UM tools (ii)
Data information
Tool
Purpose
cumf
Compares UM format files
pumf
Prints out header information for PP files
uminfo
Header information UM
ppinfo
Header information PP
Data manipulation
Tool
Purpose
umpack
Removes spare headers and extra buffers from UM files
fieldop
Adds, subtracts, multiplies, divides UM (fields files)
format
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Xconv
• Xconv can be used to see what fields are contained within a
data file and to look at the data values, either directly at
the numerical values or at a gridbox fill plot of the data.
• It can also convert model output into netCDF.
Supported input formats:
– Data output from the UKMO Unified Model
– UKMO PP format
– GRIB format
– netcdf format
• Data manipulations available:
– Spectral to gridpoint
– Interpolation (bilinear or area-weighted)
– Conversion to and from rotated grids
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Making ancillary files (i)
• For creating standard ancillary files can use the Central
Ancillary Program (CAP)
–
–
–
–
–
–
–
Orography
Land-sea mask
Soil moistue, snow
Vegetation
Aerosol
Sea surface temperatue, sea-ice
Ozone
• Typically used for running the LAM
• Contact the CMS helpdesk for more information:
http://cms.ncas.ac.uk/wiki/CmsHelpdesk
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Making ancillary files (ii)
For creation of ancillary files from your own data.
Conversion
tool
netCDF data file
on the UM grid
with land-sea mask
Create using a
tool of your
choice
(python, idl, …)
PP-format file
pptoanc
UM ancillary file
This can also be done with xancil
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xancil
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Visualisation and analysis
UM run
UM fields files
Python, idl
MATLAB etc
ff2pp
cf-python
xconv
NDdiag
Iris
Ferret
Jplot
UKMO library
(midl)
grads
cfplot
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Jasmin Analysis Platform (JAP)
• Collection of tools commonly used for atmospheric and
Earth observation science, including:
– NetCDF and nco tools
– Cf-python, cfplot and Iris
– Xconv, CDAT and lots more
• Installed on all the Jasmin systems (at BADC, Bristol,
Reading and Leeds).
• Can download as:
– Virtual Machine, which will work on any system running
VirtualBox
– RPMs for RHEL/CentOS Linux
http://proj.badc.rl.ac.uk/cedaservices/wiki/JASMIN/AnalysisPlatform
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