|From||"Roger Brugge" <email@example.com>|
|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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