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December 2011
Message 57

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[Met-jobs] Vacancy: Manager of the Joint Weather and Climate Research Programme, UK

From "Roger Brugge" <r.brugge@reading.ac.uk>
To "met-jobs@lists.rdg.ac.uk" <met-jobs@lists.reading.ac.uk>
Date Thu, 15 Dec 2011 15:44:28 +0000

JWCRP Scientist
Salary: Starting salary £25,500 with progression to £31,500 +
competitive benefits, including Civil Service Pension.

Background information
With a move to a wider community of model users it is expected that key
model runs (e.g. for future IPCC exercises) will need to be delivered
via a variety of platforms. Further, with a squeeze on capital spend,
use of a wider range of platforms will be increasingly important.
Porting an Earth System Model (ESM) to a new platform (or across a
system change) and proving that it is scientifically the same model, is
essential to delivering reproducible science. Given the millions of
pounds in human effort and HPC invested in certain key models and runs,
the testing process must be carried out rigorously. Experience shows
that each port of a major model configuration currently requires in
excess one person year for testing/resolving issues
and a wide range of skills are required.
The current rapid rate of growth of bit-level perturbations in the UM is
seen as
making testing of ported model configurations more difficult and time
consuming (since tracking errors by analysing long and complex
climatological tests is much more time-consuming than tracking
differences in short bit-level divergence tests). While some analysis
has been done of the reasons for the rapid perturbation growth, more
research is required. Slower perturbation growth could lead to long term
gains in porting efficiency and there is evidence that other models are
better in this regard.
A second key factor limiting portability and efficient running of high
resolution
models is the numerical stability of the integrations. Research is
required to
investigate long standing issues causing numerical stability problems.
This work involves close collaboration with the Atmospheric Processes
and Parametrization groups and Dynamics Research at the Met Office.

Specific job purpose
This is a Joint Weather and Climate Research Programme (JWCRP - see
supplementary information) infrastructure post to research methods and
metrics for efficient porting of scientific numerical model codes to a
variety of HPC platforms, reducing model (bit-level) divergence and
improving model numerical stability.

Specific job responsibilities
Research and development to improve model numerical stability and
reduce rapid model divergence arising from bit-level perturbations
resulting from running on different platforms.
Developing improved methods/metrics to validate that scientific porting
of theUnified Model has been successful.
Developing methods to ensure new code doesn't increase divergence or
degrade model stability.
Approach to be applied consistently to all earth system sub-components
(JULES, UKCA etc.).
Compiling and educating users in best practice in algorithm design and
computational implementation.

Qualifications, skills and abilities required
Essential
An honours degree (2:1 or above) in a physical science, mathematics, or
scientific computing or other related discipline.

Demonstrated competence in postgraduate research and development in a
related field.

A high level of capability in general computing skills (Fortran, Unix,
IDL), with proven expertise in handling and working with large numerical
codes.

Ability to work effectively both as an independent scientist but also
as part of a larger team involving colleagues at the Met Office and UK
Universities (NERC).

Good communication skills.

Desirable

A PhD in IT or geophysical science with strong numerical modelling
component.
Knowledge of the Unified Model, its dynamics and parametrizations and
experience in running the UM on HPC platforms.
Additional supplementary information
The Joint Weather & Climate Research Programme (JWCRP) is a joint
programme between NERC and the Met Office. The overarching goal of this
programme is to ensure that the UK maintains and strengthens its leading
international position in weather and climate science, and hence in
weather and climate forecasting and provision of advice for policy.
The JWCRP will have two major elements. The first addresses the joint
commitment to sustaining and growing the UK's national capability and
research in observing, understanding, modelling and predicting weather
and climate, along with the infrastructure required to deliver that
national capability and research. The second is the need to align major
research initiatives and programmes to ensure the most effective impact
of the research and pull-through into the delivery of services to
government and business. It is essential that you use the application
form to provide all the relevant information to help us accurately
assess your suitability.

Application forms and further information
Please mark your returned application form: JWCRP Scientist
The closing date for applications is 20th Jan 2012
The application form and guidance on how to apply are available at:
http://www.metoffice.gov.uk/about-us/jobs/how-to-apply


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