Wave coupling processes of the middle and upper atmosphere: Interannual and long-term variability

• Applicants: Professor Dr. Christoph Jacobi; Dr. Toralf Renkwitz, since 1/2020
• Subject Area: Atmospheric Science
• Term: from 2019 to 2023
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 416603629

• Final Report Year: 2023

Final Report Abstract

The project aimed at analyzing the influence of wave coupling on the thermosphere/ionosphere (T/I) at time scales from years to decades. This included the analysis of long-term data sets in the middle (neutral) atmosphere, the investigation of wave processes, and the analysis of coupling processes. To this end, mainly ground-based radar data have been used together with global circulation and Earth system models. Long-term trends in middle atmosphere winds and gravity waves have been established, including a possible trend break in the late 1990s. Long-term trends in the mesosphere and lower thermosphere can, at least qualitatively, be reproduced by models, although these partly struggle in describing the mean mesospheric circulation. Results of a double CO2 model run reveal dramatic changes of the thermospheric circulation and ionospheric parameters.

Publications

• Implementing a whole atmosphere gravity wave parameterization in the Middle and Upper Atmosphere Model: preliminary results. Rep. Inst. Meteorol. Univ. Leipzig, 57 (59-70)
  Lilienthal, F., N. Samtleben, C. Jacobi & E. Yigit
  
• Mesosphere/lower thermosphere winds measured with nearby SKiYMET meteor radars at Collm and Juliusruh, and comparison with Kazan winds. Kleinheubach Conference 2019.
  Jacobi, Ch., F. Lilienthal, G. Stober, D. Korotyshkin & E. Merzlyakov
  
• Trend analyses of solar tides in the middle atmosphere. Rep. Inst. Meteorol. Univ. Leipzig, 57, 85 –96
  Löffelmann, J., F. Lilienthal & Ch. Jacobi
  
• Impact of local gravity wave forcing in the lower stratosphere on the polar vortex stability: effect of longitudinal displacement. Annales Geophysicae, 38(1), 95-108.
  Samtleben, Nadja; Kuchař, Aleš; Šácha, Petr; Pišoft, Petr & Jacobi, Christoph
  
• Multi-year changes in the mesoscale waves according to the data of drift and radio-meteor measurements at Collm, Germany. 26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 76. SPIE.
  Gavrilov, Nikolai M. & Jacobi, Christoph
  
• On the intermittency of orographic gravity wave hotspots and its importance for middle atmosphere dynamics. Weather and Climate Dynamics, 1(2), 481-495.
  Kuchar, Ales; Sacha, Petr; Eichinger, Roland; Jacobi, Christoph; Pisoft, Petr & Rieder, Harald E.
  
• Diverse Dynamical Response to Orographic Gravity Wave Drag Hotspots—A Zonal Mean Perspective. Geophysical Research Letters, 48(13).
  Sacha, P.; Kuchar, A.; Eichinger, R.; Pisoft, P.; Jacobi, C. & Rieder, H. E.
  
• Interhemispheric differences of mesosphere–lower thermosphere winds and tides investigated from three whole-atmosphere models and meteor radar observations. Atmospheric Chemistry and Physics, 21(18), 13855-13902.
  Stober, Gunter; Kuchar, Ales; Pokhotelov, Dimitry; Liu, Huixin; Liu, Han-Li; Schmidt, Hauke; Jacobi, Christoph; Baumgarten, Kathrin; Brown, Peter; Janches, Diego; Murphy, Damian; Kozlovsky, Alexander; Lester, Mark; Belova, Evgenia; Kero, Johan & Mitchell, Nicholas
  
• Radar observations of geomagnetic disturbance effects on midlatitude mesosphere/lower thermosphere dynamics. Rep. Inst. Meteorol. Univ. Leipzig, 59, 1 –11
  Jacobi, Ch., F. Lilienthal, D. Korotyshkini, E. Merzlyakov & G. Stober
  
• Stratospheric contraction caused by increasing greenhouse gases. Environmental Research Letters, 16(6), 064038.
  Pisoft, Petr; Sacha, Petr; Polvani, Lorenzo M.; Añel, Juan Antonio; de la Torre, Laura; Eichinger, Roland; Foelsche, Ulrich; Huszar, Peter; Jacobi, Christoph; Karlicky, Jan; Kuchar, Ales; Miksovsky, Jiri; Zak, Michal & Rieder, Harald E.
  
• The response of mesospheric H2O and CO to solar irradiance variability in models and observations. Atmospheric Chemistry and Physics, 21(1), 201-216.
  Karagodin-Doyennel, Arseniy; Rozanov, Eugene; Kuchar, Ales; Ball, William; Arsenovic, Pavle; Remsberg, Ellis; Jöckel, Patrick; Kunze, Markus; Plummer, David A.; Stenke, Andrea; Marsh, Daniel; Kinnison, Doug & Peter, Thomas
  
• Long-term studies of mesosphere and lower-thermosphere summer length definitions based on mean zonal wind features observed for more than one solar cycle at middle and high latitudes in the Northern Hemisphere. Annales Geophysicae, 40(1), 23-35.
  Jaen, Juliana; Renkwitz, Toralf; Chau, Jorge L.; He, Maosheng; Hoffmann, Peter; Yamazaki, Yosuke; Jacobi, Christoph; Tsutsumi, Masaki; Matthias, Vivien & Hall, Chris
  
• Meteor radar vertical wind observation biases and mathematical debiasing strategies including the 3DVAR+DIV algorithm. Atmospheric Measurement Techniques, 15(19), 5769-5792.
  Stober, Gunter; Liu, Alan; Kozlovsky, Alexander; Qiao, Zishun; Kuchar, Ales; Jacobi, Christoph; Meek, Chris; Janches, Diego; Liu, Guiping; Tsutsumi, Masaki; Gulbrandsen, Njål; Nozawa, Satonori; Lester, Mark; Belova, Evgenia; Kero, Johan & Mitchell, Nicholas
  
• Long-term geospace climate monitoring. Frontiers in Astronomy and Space Sciences, 10.
  Zhang, Shun-Rong; Cnossen, Ingrid; Laštovička, Jan; Elias, Ana G.; Yue, Xinan; Jacobi, Christoph; Yue, Jia; Wang, Wenbin; Qian, Liying & Goncharenko, Larisa
  
• Long-term trends of midlatitude horizontal mesosphere/lower thermosphere winds over four decades. Advances in Radio Science, 21, 111-121.
  Jacobi, Christoph; Kuchar, Ales; Renkwitz, Toralf & Jaen, Juliana
  
• Solar Cycle and Long‐Term Trends in the Observed Peak of the Meteor Altitude Distributions by Meteor Radars. Geophysical Research Letters, 50(2).
  Dawkins, E. C. M.; Stober, G.; Janches, D.; Carrillo‐Sánchez, J. D.; Lieberman, R. S.; Jacobi, C.; Moffat‐Griffin, T.; Mitchell, N. J.; Cobbett, N.; Batista, P. P.; Andrioli, V. F.; Buriti, R. A.; Murphy, D. J.; Kero, J.; Gulbrandsen, N.; Tsutsumi, M.; Kozlovsky, A.; Kim, J. H.; Lee, C. & Lester, M.