PhD position

Your Job:Remote sensing data from satellites are an extremely valuable information source to improve air quality predictions. They monitor aerosol and trace gases often with global coverage, which is far beyond in-situ observational networks. However, the accuracy of satellite retrievals depends on several assumptions leading to biased observations. The aim of the PhD-project is to overcome this limitation in the use of satellite observations by make a direct use of radiance observations retrieved by satellites using machine learning without the need of radiative transfer calculations. The new model will be developed using the example of the novel Earth Explorer EarthCARE and will be integrated as observation operator to the sophisticated data assimilation system of the EURopean Air pollution Dispersion – Inverse Model (EURAD-IM). The PhD project will be conducted in the atmospheric modeling group of the Institute of Climate and Energy Systems (ICE-3) at Forschungszentrum Jülich and the Meteorological Institute at the University of Cologne. At ICE-3 detailed investigations of the emission of atmospheric constituents are performed using the 4-dimensional variational (4D-var) data assimilation method implemented into the EURAD-IM. In atmospheric chemistry modeling, the 4D-var method is a powerful tool to assess the state of the atmosphere and the corresponding emissions that are in compliance with observations. The AWARES group at the University of Cologne provides extensive expertise in remote sensing and radiative effects in the atmosphere. To include the observations in the assimilation procedure, so called observation operators, mapping the model state to the observation space, are essential. Within the project, the direct use of radiance measurements from EarthCARE will be explored by developing a machine learning model that directly maps the radiances on the aerosol properties. Thus, the modelling framework of the EURAD-IM will be enabled to use radiance assimilation for operational services. The innovative application of machine learning to exploit satellite data within numerical modelling links to other scientific applications beyond those of the atmosphere. The project builds on strong cooperation between ICE-3, the University of Cologne and other partners within and outside Forschungszentrum Jülich, which provides an ideal fundament to combine competences across different disciplines (meteorology, environmental science, high performance computing, software development and data science). Your Profile:Mandatory qualifications are: M. Sc. degree in meteorology, physics, mathematics, or a related field Good knowledge in data handling and machine learning Good knowledge in software development and data processing and visualization with Python Strong interest in atmospheric physics and chemistry Outstanding organizational skills and the ability to work independently Very good cooperation and communication skills and ability to work as part of a team in an international and interdisciplinary environmentOur Offer:We work on the very latest issues that impact our society and are offering you the chance to actively help in shaping the change This HDS-LEE PhD position will be located at Forschungszentrum Jülich and University of Cologne. We offer ideal conditions for you to complete your doctoral degree: Outstanding scientific and technical infrastructure A highly motivated group as well as an international and interdisciplinary working environment at one of Europe’s largest research establishments Continuous scientific mentoring by your scientific advisors Chance of participating in (international) conferences Unique HDS-LEE graduate school program (including data science courses, soft skill courses and annual retreats) Qualification that is highly welcome in industry Further development of your personal strengths, via a comprehensive further training program; a structured program of continuing education and networking opportunities specifically for doctoral researchers via JuDocS, the Jülich Center for Doctoral Researchers and Supervisors: 30 Days of annual leave and flexible working arrangements, including partial remote work Targeted services for international employees, through our International Advisory Service The position is initially limited to three years, with a planned one-year extension. Pay in line with 75% of pay group 13 of the Collective Agreement for the Public Service (TVöD-Bund) and additionally 60 % of a monthly salary as special payment („Christmas bonus“). The monthly salaries in euro can be found on the BMI website: