Unified Model
The Unified Model is the atmospheric component of ACCESS, developed by the UK's Met Office. The Centre of Excellence sublicences the UM from CAWCR, our licence allows us to run the UM at NCI only. To run the UM you will first need an NCI account, then ask for connection to the ACCESS group through NCI's account website.
The ACCESS climate models are based on version 7.3 of the UM, most Australian university research uses this version. The Bureau makes use of the more recent version 7.8 for forecasting, and is evaluating moving to version 8.2. These are the primary versions supported at NCI, other versions are available but may not be quite as well tested. Different versions include changed science configurations, for details see the release notes.
Contents
Getting Started
The UM is configured through a graphical interface, which is run from the server Accessdev. Follow the Set Up Instructions for the version of the model you want to run.
There are two ways to run the model. Newer versions (post UM 10) use Rose & Cylc, older versions (pre UM 10) use a program called UMUI.
The Met Office have a tutorial for the model at https://code.metoffice.gov.uk/doc/um/latest/
UM 10 / Global Atmosphere / ACCESS 2.x
The current version of the Unified Model is available from the Met Office's repository site https://code.metoffice.gov.uk.
ARCCSS researchers need to email climate_help@nci.org.au to request an account on the Met Office server.
Links & More Information
- Connecting to Accessdev and running Rose
- Tips on using Rose with the UM
- Getting Started with ACCESS
- UM code & issue tracker
- UM 10.X Documentation
- Rose Interface Tutorial
- UM User Tutorial 2017
- UM User Tutorial 2016
Experiments
A full list of experiments we support or have helped set up can be found at UM Experiments
These configurations are currently our primary support targets:
Guides
Assorted information on running the UM and available job configurations is listed in the sections below. Feel free to email climate_help@nci.org.au if you have any difficulties using the UM or suggestions for how we can make using the UM simpler.
Starting Up
Run Types
- AMIP
- CMIP
- Single Column
- KPP Coupling
- ACCESS-C High-resolution NWP
- Nested / Limited Area Models
- UKCA Chemistry
- UKCA Tutorials
- CAWCR's ACCESS experiment library (log in with your NCI account)
Common Errors
If a run fails, search for 'UM ERROR' in the .leave file to see what went wrong. Common issues are listed here
Job Input
Job Output
- Using STASH
- UM output filename convention
- Analysing UM outputs & Converting to NetCDF
- Archiving Output
- Comparing UM Files
- Mapping UM outputs to CMIP fields
Modifying the UM
Informative
UM and ACCESS FAQs
- Who can gain access to the UM and the ACCESS models?
- What to do to gain access to the UM and the ACCESS models?
- What to do to use the software in /projects/access/bin?