|Faculty of Physics and Earth Science||
Middle and Upper Atmosphere
DFG JA836/34-1 (2016-2020)
To get insight into the forcing mechanisms of the QDT, we use a mechanistic circulation
model of the middle atmosphere, which includes nonlinear interaction processes
as well as radiative forcing. In sensitivity experiments,
the different forcing mechanisms are turned off both separately and in combination.
Within QuarTA, from combining local and global observations with numerical modelling, we therefore expect to get more insight into the global structure of the QDT as well as into its forcing processes, which have not yet been analyzed in sufficient detail.
QDT zonal wind amplitudes over Collm as measured by meteor radar.
Zonal wind amplitude at ~95 km log-pressure height, as modeled by the MUAM circulation model.
Geißler, C., Ch. Jacobi, and F. Lilienthal, 2020: Forcing mechanisms of the migrating quarterdiurnal tide, Ann. Geophys., 38, 527–544, https://doi.org/10.5194/angeo-38-527-2020.
Jacobi, Ch., and C. Arras, 2019: Tidal wind shear observed by meteor radar and comparison with sporadic E occurrence rates based on GPS radio occultation observations, Adv. Radio Sci., 17, 213-224, https://doi.org/10.5194/ars-17-213-2019.
Löffelmann, J., F. Lilienthal, and Ch. Jacobi, 2019: Trend analyses of solar tides in the middle atmosphere, Rep. Inst. Meteorol. Univ. Leipzig, 57, 71-84, http://meteo.physgeo.uni-leipzig.de/de/orga/LIM_Bd_57.pdf.
Jacobi, Ch., C. Arras, C. Geißler, and F. Lilienthal, 2019: Quarterdiurnal signature in sporadic E occurrence rates and comparison with neutral wind shear, Ann. Geophys.,37, 273-288, https://doi.org/10.5194/angeo-37-273-2019.
Jacobi, Ch., C. Geißler, F. Lilienthal, and A. Krug, 2018: Forcing mechanisms of the 6-hour tide in the mesosphere/lower thermosphere, Adv. Radio Sci., 16, 141-147, https://doi.org/10.5194/ars-16-141-2018.
Jacobi, Ch., and C. Arras, 2018: 6 hr tide seen in sporadic E layers, Rep. Inst. Meteorol. Univ. Leipzig 56, 11-20, ISBN: 978-3-9814401-6-4, http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa2-317680.
Geißler, Ch., and Ch. Jacobi, 2018: Forcing of the Quarterdiurnal Tide, Rep. Inst. Meteorol. Univ. Leipzig, 56, 21-30, ISBN: 978-3-9814401-6-4, http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa2-317929.
Jacobi, Ch., A. Krug, and E. Merzlyakov, 2017: Radar observations of the quarterdiurnal tide at midlatitudes: Seasonal and long-term variations, J. Atmos. Sol.-Terr. Phys., 163, 70-77, https://doi.org/10.1016/j.jastp.2017.05.014.
Jacobi, Ch., A. Krug, and E.G. Merzlyakov, 2016: Radar wind climatology of the quarterdiurnal tide in the mesopause region over Central and Eastern Europe, Rep. Inst. Meteorol. Univ. Leipzig, 54, 47-56, ISBN: 978-3-9814401-4-0, http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa2-167047".
Jacobi, Ch., A. Krug, F. Lilienthal, L. M. Lima und E. Merzlyakov, 2016: Radar observations of the quarterdiurnal tide in the mesosphere/lower thermosphere, EGU General Assembly 2016, 17.-22.4.2016, Vienna.
Last update 15 May 2020