Global Circulation
The global residual circulation extends from the troposphere through the middle atmosphere. In the upper mesosphere / lower thermosphere, it is in exchange with the atmospheric layers above. The interaction between waves and mean flow ad well as inter- and intra-hemispheric differences and similarities are of special interest. They are a key element in the global energy budgets.
Methods
For the diagnosis of the spatio-temporally averaged mass circulation the so-called Transformed Eulerian Mean (TEM) equations are applied o observations and to model simulations, for example from KMCM. The resulting "residual" circulation contains the mean wind (Euler wind) and wave-induced transports (eddy flux). For the study of related energy balances energy and mass conserving simulations and assimilations are used.
Recent publications
- Becker, E. & S. L. Vadas, 2020: Explicit Global Simulation of Gravity Waves in the Thermosphere. J. Geophys. Res. Space Physics 125, 10, doi:10.1029/2020ja028034.
- Becker, E., S. L. Vadas, K. Bossert, V. L. Harvey, C. Zülicke & L. Hoffmann, 2022: A high-resolution whole-atmosphere model with resolved gravity waves and specified large-scale dynamics in the troposphere and lower stratosphere. J. Geophys. Res. Atmos. 127, 2: 035018, doi:10.1029/2021JD035018.
- Gassmann, A., 2019: Analysis of Large-Scale Dynamics and Gravity Waves under Shedding of Inactive Flow Components. Mon. Wea. Rev. 147, 8: 2861-2876, doi:10.1175/mwr-d-18-0349.1.
- Harvey, V. L., C. E. Randall, E. Becker, A. K. Smith, C. G. Bardeen, J. A. France & L. Goncharenko, 2019: Evaluation of the Mesospheric Polar Vortices in WACCM. J. Geophys. Res. Atmos. 124: 10,626-610,645, doi:10.129/2019JD030727.
