UKCA Release Jobs
This page contains documentation on UKCA standard jobs that have not yet been released, but will be soon.
Getting Started
PUMA
The UK Met Office's Unified Model (UM) is provided for the NERC community from NCAS Computational Modelling Services via the PUMA (Providing UM Access) resource. To use UKCA you must have an account on PUMA. To obtain one, please go to the NCAS-CMS PUMA page.
FCM
The UM uses code management software, built around subversion, called FCM (Flexible Configuration Management). If you have not used the UM with FCM, we recommend first familiarising yourself with the system, by doing the UM FCM Tutorial. As well as being a good introduction to FCM and the UM User Interface (UMUI), it will also teach you how to set-up some configuration files that will be needed in the day-to-day running of the UM and UKCA.
Standard Release Jobs
UKCA can be configured through the UMUI, via it's own configuration panel. This mostly controls all the options required to run UKCA, although some extra changes have been made with hand-edits. To make it easy to get started with UKCA, several standard jobs have been created at various resolutions. To get started with UKCA, it should be a simple matter to take a copy of the UKCA job that you wish to run, changing a few user-specific options, and submitting the job.
Available release jobs are:
| UM Version | UMUI Job-ID | Climate Model | Horizontal Resolution | Vertical Levels | Model Top | Scheme Used |
|---|---|---|---|---|---|---|
| 7.3 | QESM-A | N48 (2.5°×3.75°) | L60 | ~84km | Tropospheric Chemistry with Isoprene | |
| 7.3 | HadGEM3-A r2.0 | N96 (1.25°×1.875°) | L63 | ~40km | Tropospheric Chemistry with Isoprene | |
| 7.3 | QESM-A | N48 | L60 | ~84km | Stratospheric Chemistry | |
| 7.3 | HadGEM3-A r2.0 | N96 | L85 | 85km | Stratospheric Chemistry | |
| 7.3 | QESM-A | N48 | L60 | ~84km | Simple Tropospheric Chemistry with MODE Aerosol | |
| 7.3 | HadGEM3-A r2.0 | N96 | L38 | ~40km | Simple Tropospheric Chemistry with MODE Aerosol | |
| 7.3 | HadGEM3-A r2.0 | N96 | L38 | ~40km | Simple Tropospheric Chemistry with MODE Aerosol (Nudged) |
Required UMUI Changes
Before submitting a UKCA job, you must first alter several options in the UMUI:
- User-id, Mail-id (email address), and Tic-Code:
Model Selection -> User Information and Target Machine -> General Details
The user-id is your username on the target machine (i.e. HECToR).
The tic-code will be the HECToR charging code, e.g. n02-chem. This code can be found by logging into the HECToR SAFE pages, and viewing your account information. - Target machine root extract directory (UM_ROUTDIR):
Model Selection -> FCM Configuration -> FCM Extract and Build directories and Output levels
This needs to be the full path to your working directory on the target machine (i.e. HECToR).
Optional UMUI Changes
- Model start date and run length:
Model Selection -> Input/Output Control and Resources -> Start Date and Run Length Options
NOTE: For Stratospheric Chemistry, the CFC and other long-lived trace gas concentrations will be highly dependent on year - you will need to think about your chemical tracer initial conditions if you change the start date of a Stratospheric Chemistry run. - Archiving:
Model Selection -> Post Processing -> Main Switch + General Questions
Currently archiving is switched ON.
All model output will placed in a directory called archive which is a sub-directory of your run directory. Superseded model restart dumps will be deleted. - UKCA Surface emissions (as user single-level ancillary file):
Model Selection -> Atmosphere -> Ancillary and input data files -> Climatologies and potential climatologies -> User single-level ancillary files and fields
