Shaposhnikov, D. S.; Grigalashvili, M.; Medvedev, A. S.; Sonnemann, G. R.; Hartogh, P.: Analytical Approximations of the Characteristics of Nighttime Hydroxyl on Mars and Intra-Annual Variations. Solar System Research 57, pp. 1 - 13 (2023)
Kulikov, M. Y.; Belikovich, M. V.; Grygalashvyly, M.; Sonnemann, G. R.; Ermakova, T. S.; Nechaev, A. A.; Feigin, A. M.: Daytime ozone loss term in the mesopause region. Annales Geophysicae 35 (3), pp. 677 - 682 (2017)
Sonnemann, G. R.; Hartogh, P.; Berger, U.; Grygalashvyly, M.: Hydroxyl layer: trend of number density and intra-annual variability. Annales Geophysicae 33, pp. 749 - 767 (2015)
Sonnemann, G. R.; Grygalashvyly, M.: Global annual methane emission rate derived from its current atmospheric mixing ratio and estimated lifetime. Annales Geophysicae 32, pp. 277 - 283 (2014)
Sonnemann, G. R.; Hartogh, P.; Berger, U.; Lübken, F.-J.; Grygalashvyly, M.: Anthropogenic effects on the distribution of minor chemical constituents in the mesosphere/lower thermosphere - A model study. Advances in Space Research 50 (5), pp. 598 - 618 (2012)
Hartogh, P.; Jarchow, C.; Sonnemann, G. R.; Grygalashvyly, M.: Ozone distribution in the middle latitude mesosphere as derived from microwave measurements at Lindau (51.66 N, 10.13 E). Journal Geophysical Research 116, D04305 (2011)
Hartogh, P.; Sonnemann, G. R.; Grygalashvyly, M.; Jarchow, C.: Ozone trends in the mid-latitude stratopause region based on microwave measurements at Lindau (51.66° N, 10.13° E), the ozone reference model, and model calculations. Advances in Space Research 47 (11), pp. 1937 - 1948 (2011)
Sonnemann, G. R.; Hartogh, P.; Grygalashvyly, M.; Song, L.; Berger, U.: The quasi 5-day signal in the mesospheric water vapor concentration at high latitudes in 2003 - A comparison between observations at ALOMAR and calculations. Journal Geophysical Research 113, D04101 (2008)
Sonnemann, G. R.; Grygalashvyly, M.: The relationship between the occurrence rate of major stratospheric warmings and solar Lyman-alpha flux. Journal Geophysical Research 112 (D20), D20101 (2007)
Becker, E.; Grygalashvyly, M.; Sonnemann, G. R.; Hartogh, P.; Jarchow, C.: GWS mixing and effective diffusivity concept for minor chemical constituents in the MLT. 11th Annual, Meeting Asia Oceania Geosciences Society, Sapporo, Japan (2014)
Grygalashvyly, M.; Becker, E.; Sonnemann, G. R.; Hartogh, P.: Advanced model and theory of the OH* layer. 11th Annual Meeting, Asia Oceania Geosciences Society, Sapporo, Japan (2014)
Various application review phases in 2025. PhD projects in cosmochemistry, planetary science, solar and stellar physics, helioseismology, asteroseismology, ...
The dwarf planet is a bizarre, cryovolcanic world. However, the organic deposits discovered on its surface so far are unlikely to originate from its interior.
The Uranian magnetic field is more expansive than previously thought, according to newly analyzed data from Voyager 2, making it easier to search for moons with oceans.
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).