Chau, J. L.; Röttger, J.; Rapp, M.: PMSE strength during enhanced D region electron densities: Faraday rotation and absorption effects at VHF frequencies. Journal of Atmospheric and Solar-Terrestrial Physics 118, pp. 113 - 118 (2014)
Li, Q.; Rapp, M.; Röttger, J.; Latteck, R.; Zecha, M.; Strelnikova, I.; Baumgarten, G.; Hervig, M.; Hall, C.; Tsutsumi, M.: Microphysical parameters of mesospheric ice clouds derived from calibrated observations of polar mesosphere summer echoes at Bragg wavelengths of 2.8 m and 30 cm. Journal Geophysical Research 115, D00I13 (2010)
Hall, C. M.; Roettger, J.; Kuyeng, K.; Sigernes, F.; Claes, S.; Chau, J.: First results of the refurbished SOUSY radar: Tropopause altitude climatology at 78 degrees N, 16 degrees E, 2008. Radio Science 44, RS5008 (2009)
Hall, C. M.; Röttger, J.; Kuyeng, K.; Tsutsumi, M.; Dyrland, M.; Chau, J. L.: Polar mesospheric summer echoes at 78 degrees N, 16 degrees E, 2008: First results of the refurbished sounding system (SOUSY) Svalbard radar. Journal Geophysical Research 114, D11111 (2009)
Kuo, F. S.; Lue, H. Y.; Fern, C. L.; Röttger, J.; Fukao, S.; Yamamoto, M.: Statistical characteristics of AGW wave packet propagation in the lower atmosphere observed by the MU radar. Annales Geophysicae 27 (10), pp. 3737 - 3753 (2009)
Kuo, F. S.; Lue, H. Y.; Fern, C. L.; Roettger, J.; Fukao, S.; Yamamoto, M.: Studies of vertical fluxes of horizontal momentum in the lower atmosphere using the MU-radar. Annales Geophysicae 26 (12), pp. 3765 - 3781 (2008)
Nozawa, S.; Brekke, A.; Maeda, S.; Aso, T.; Hall, C. M.; Ogawa, Y.; Buchert, S. C.; Röttger, J.; Richmond, A. D.; Roble, R.et al.; Fujii, R.: Mean winds, tides, and quasi-2 day wave in the polar lower thermosphere observed in European Incoherent Scatter (EISCAT) 8 day run data in November 2003. Journal Geophysical Research 110 (A12), A12309 (2005)
Chen, J. S.; Hoffmann, P.; Zecha, M.; Röttger, J.: On the relationship between aspect sensitivity, wave activity, and multiple scattering centers of mesosphere summer echoes: a case study using coherent radar imaging. Annales Geophysicae 22 (3), pp. 807 - 817 (2004)
Chen, J. S.; Röttger, J.; Chu, Y. H.: System phase calibration of VHF spaced antennas using the echoes of aircraft and incorporating the frequency domain interferometry technique. Radio Science 37 (5), 1080 (2002)
Hocking, W. K.; Röttger, J.: The structure of turbulence in the middle and lower atmosphere seen by and deduced from MF, HF and VHF radar, with special emphasis on small-scale features and anisotropy. Annales Geophysicae 19 (8), pp. 933 - 944 (2001)
Nielsen, K. P.; Röttger, J.; Sigernes, F.: Simultaneous Measurements of Temperature in the Upper Mesosphere with an Ebert-Fastie Spectrometer and a VHF Meteor Radar on Svalbard (78°N, 16°E). Geophysical Research Letters 28, pp. 943 - 946 (2001)
Recently new, very sensitive observations of the ExoMars Trace Gas Orbiter (TGO) and its instruments NOMAD (Nadir and Occultation for MArs Discovery) an ACS (Atmospheric Chemistry Suite) became available and initiated a number of interesting scientific questions. Some of them are open PhD projects using the MPS General Circulation Model (MPS-GCM).
The Solar Lower Atmosphere and Magnetism (SLAM) group covers many exciting subjects in solar physics, focussing on the development and testing of highly novel solar instrumentation, reduction and analysis of highest quality solar observations, or improving and developing advanced techniques for the analysis of solar observations.
In the "Solar and Stellar Interiors" department, Laurent Gizon, Jesper Schou, Aaron Birch, Robert Cameron and others offer PhD projects in solar physics and astrophysics. Helioseismology and asteroseismology are used as important tools to study the oscillating Sun and stars.
Turbulence plays a very important role in many applications, ranging from geophysics and astrophysics to engineering. In our solar system, turbulence is often driving by thermal effect, rotation, and magnetic field. In this project you will use high-fidelity simulation tools, including direct numerical simulations, data assimilation, and machine learning, to study the physics of turbulence, focusing on convection and dynamos.
The Planetary Plasma Environments group (PPE) has a strong heritage in the exploration of planetary magnetospheres and space plasma interactions throughout the solar system. It has contributed instruments to several past missions that flew-by or orbited Jupiter (Galileo, Cassini, Ulysses). The PPE participates in the JUICE mission by contributing hardware and scientific expertise to the Particle Environment Package (PEP).
Inversion codes are used to aid the detailed interpretation of solar spectro-polarimetric data. This computer code attempts to find the atmospheric structure that produced an observed spectrum by minimizing the difference between the observed spectrum and a Stokes spectrum.