Scientist on Coupled Satellite Data Assimilation

We have an exciting opportunity for a highly motivated scientist to advance our exploitation of satellite data in the ECMWF's global forecasting systems. The role will prepare the advanced use of observations from the Copernicus Polar Ice and Snow Topography Altimeter (CRISTAL), planned to be launched by the European Space Agency (ESA) in 2028. CRISTAL will provide information on thickness of sea ice and the snow that covers it. The aim will be to use this information in an optimal way in our coupled ocean-atmosphere data assimilation system and to improve our global Numerical Weather Prediction (NWP) forecasts.,

• Adapt the ECMWF ocean and sea ice data assimilation system to enable the monitoring and assimilation of CRISTAL altimeter-range information


• Develop novel ways to represent CRISTAL altimeter-range data combining machine learning and physical radiative transfer concepts as required


• Perform and analyse ocean data assimilation and coupled data assimilation experiments to evaluate the benefit of CRISTAL data, using existing observations as proxy for CRISTAL data


• Ensure timely delivery of relevant results to the European Space Agency


• Communicate and document scientific results and software developments in technical reports, journal publications, conferences and meetings as appropriate
  
  Excellent analytical and problem-solving skills with a proactive and constructive approach


• Ability to succeed both independently and as part of multidisciplinary and geographically distributed teams


• Flexibility, with the ability to adapt to changing priorities


• Excellent interpersonal and communication skills


• Ability to work efficiently and complete diverse tasks in a timely manner


Education


• A PhD or equivalent proven research experience in Earth System Science, Physics, Applied Mathematics, Computer Science, or a related discipline


Experience, knowledge and skills


• Experience in satellite data analysis, radiative transfer or data assimilation


• Some experience with ocean and sea ice data assimilation or the use of altimeter data would be an advantage


• Experience with machine learning is highly desirable, ideally for geophysical applications


• Experience with performing statistical analyses and preparing scientific figures


• Strong programming skills, ideally in Python, Fortran, and UNIX shell scripting or equivalent


• Experience with working on high-performance computing platforms in Unix/Linux-based environments would be an advantage, Candidates must be able to work effectively in English and interviews will be conducted in English. A good knowledge of one of the Centre's other working languages (French or German) is an advantage but not required.
  
  The successful candidate will develop our capabilities to use CRISTAL altimeter range data in a state-of-the-art coupled ocean-atmosphere data assimilation to analyse sea ice variables. The focus will be on sea ice thickness analysis, accounting for the difficult issue of snow on sea ice. The candidate will also develop the dataflow for CRISTAL observations in the ECMWF systems.


The role will be based in a team dedicated to advancing ocean and coupled data assimilation, and the research will feed directly into ECMWF's operational global NWP system. The position is funded by ESA as part of the Data Assimilation and Numerical Testing for Copernicus EXpansion missions (DANTEX) initiative. DANTEX is a three-year project funded by the European Space Agency to establish scientific and technical capability for Copernicus missions, notably the Copernicus Expansion Missions CIMR, CRISTAL and LSTM, and also the existing Sentinel-1 mission, which is currently under exploited in Numerical Weather Prediction. This phase of DANTEX will run from late in 2024 to late in 2027 and future phases are foreseen (subject to funding).

The team

The successful candidate will join the Coupled Assimilation Team, dedicated to coupled data assimilation methodology developments as well as land and ocean data assimilation developments. One of the key focus of the team is to enhance the exploitation of satellite observations sensitive to the surface. The team has pioneered the developments of coupled data assimilation methods and implementation towards an Earth system coupled data assimilation for operational applications. The team is part of the Earth System Assimilation Section in the Research Department of ECMWF. The Section is responsible for developing and optimising ECMWF's assimilation system, one of the most advanced systems for the exploitation of satellite data for operational NWP and reanalyses. There will be strong collaboration with other teams across ECMWF, particularly the Actively Sensed Observations Team.

About ECMWF

The European Centre for Medium-Range Weather Forecasts (ECMWF) is a world-leader in weather and environmental forecasting. As an international organisation we serve our members and the wider community with global weather predictions and data that is critical for understanding and solving the climate crisis. We function as a 24/7 research and operational centre with a focus on medium and long-range predictions, holding one of the largest meteorological data archives in the world. The success of our activities builds on the talent of our scientists and experts, strong partnerships with 35 Member and Co-operating States and the international community, some of the most powerful supercomputers in the world, and the use of innovative technologies and machine learning across our operations. ECMWF is a multi-site organisation, with a main office in Reading, UK, a data centre/supercomputer in Bologna, Italy, and a large presence in Bonn, Germany.

ECMWF has also developed a strong partnership with the European Union and has been entrusted with the implementation and operation of the Destination Earth Initiative and the Climate Change and Atmosphere Monitoring Services of the Copernicus Programme. Other areas of work include High Performance Computing and the development of digital tools that enable ECMWF to extend provision of data and products covering weather, climate, air quality, fire and flood prediction and monitoring., At ECMWF, we consider an inclusive environment as key for our success. We are dedicated to ensuring a workplace that embraces diversity and provides equal opportunities for all, without distinction as to race, gender, age, marital status, social status, disability, sexual orientation, religion, personality, ethnicity and culture. We value the benefits derived from a diverse workforce and are committed to having staff that reflect the diversity of the countries that are part of our community, in an environment that nurtures equality and inclusion.

Applications are invited from nationals from ECMWF Member States and Co-operating States, as well as from all EU Member States. In these exceptional times, we also welcome applications from Ukrainian nationals for this vacancy. Applications from nationals from other countries may be considered in exceptional cases.

ECMWF Member States and Co-operating States are: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Georgia, Germany, Greece, Hungary, Iceland, Ireland, Israel, Italy, Latvia, Lithuania, Luxembourg, Montenegro, Morocco, the Netherlands, Norway, North Macedonia, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the United Kingdom.