15/04/2021
Science 4 Refugees

56386: PhD candidate in ionospheric physics (f/m/x) - The effect of sudden stratospheric warmings on the variability of the ionosphere

This job offer has expired


  • ORGANISATION/COMPANY
    Deutsches Zentrum für Luft - und Raumfahrt (DLR)
  • RESEARCH FIELD
    Engineering
    Technology
  • RESEARCHER PROFILE
    First Stage Researcher (R1)
  • APPLICATION DEADLINE
    16/10/2021 02:00 - Europe/Brussels
  • LOCATION
    Germany › Neustrelitz
  • TYPE OF CONTRACT
    To be defined
  • JOB STATUS
    Other

OFFER DESCRIPTION

Area of research:

Other,PHD Thesis

Part-Time Suitability:

The position is suitable for part-time employment.

Job description:

The Institute for Solar-Terrestrial Physics focusses on the observation, investigation and modelling of the near-Earth space weather. Space weather has a decisive influence on the propagation of radio waves, which is used for terrestrial and satellite-based communication as well as for satellite-based navigation. In view of society's growing dependence on the accuracy, availability and reliability of satellite-based radio systems, preventive measures are needed to protect human life and technical systems from the effects of space weather. The observation and modeling of the state of the ionosphere, which are crucial components of these measures, have been carried out at DLR's Neustrelitz site for many years.

Predicting the state of the ionosphere is a major challenge because it is based on complex interactions among others between the middle neutral atmosphere (10-100km) and the ionosphere, which need to be scientifically investigated and described. Especially sudden stratospheric warmings, a dramatic warming of the stratosphere (10-50km) of up to 80K within a few days associated with reversal of the circulation (see figure), can drastically modify the coupling between the middle atmosphere and the thermosphere/ionosphere. These changes can be as severe as those caused by geomagnetic storms and space weather.
Your mission is to study the influence of sudden stratospheric warmings on the variability of the thermosphere/ionosphere especially at mid and high latitudes. The effect on radio wave propagation will also be investigated. To better understand the physical processes, local and global observations as well as model data will be combined.
Your work performance will be 19.25 hours per week. The remuneration is 75% of German TVöD group 13.

Your tasks will include:

  • Researching the literature with the goal of critically evaluating proven and new mathematical methods and making them useful for your own work and deriving possible solutions for your own work
  • Analysis of satellite observations, ionosonde and meteor radar data, reanalysis data, VLF and LF measurements and if necessary further data sets
  • Determination of planetary waves in the middle atmosphere, which were generated in association with a sudden stratospheric warming
  • Determination of ionospheric oscillations with characteristic properties of planetary waves
  • Literature review of current knowledge regarding the association of ionospheric variations with stratospheric warming
  • Investigation of the relationship between planetary waves generated by stratospheric warmings and ionospheric oscillations
  • Characterize the effect of stratospheric warmings on the thermosphere/ionosphere and mid- and high-latitude radio wave propagation and determine the potential to predict it
  • Publication of the results in scientific journals and presentation of the results at national and international conferences

This research center is part of the Helmholtz Association of German Research Centers. With more than 42,000 employees and an annual budget of over € 5 billion, the Helmholtz Association is Germany's largest scientific organisation.

Work location(s)
1 position(s) available at
Deutsches Zentrum für Luft - und Raumfahrt (DLR)
Germany
Neustrelitz

EURAXESS offer ID: 629701
Posting organisation offer ID: 15153532

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