Atmosphere-Ionosphere-Magnetosphere (AIM) Section
Research goal: Understand the processes affecting the dynamical, electrodynamical, thermodynamical, and chemical conditions in the Earth's upper atmosphere, ionosphere, and magnetosphere; understand the couplings of these regions to the interplanetary medium and the lower atmosphere, and their response to the Sun's variable radiative, particulate and magnetic emissions.
Featured Science Highlight
–2 November 2012–
An analysis of the momentum budget of the diurnal westward-propagating wavenumber-1 (DW1) tide simulated by the Whole Atmosphere Community Climate Model (WACCM) found that momentum advection makes a dominant contribution to the phase change of DW1 in the zonal wind compared with the effects of gravity-wave forcing. The figure shows the Time tendency amplitudes in the DW1 component of (a) total advection forcing, (b) total gravity-wave forcing and (c) the sum of them in the zonal momentum from WACCM simulation, in units of m/s/day.
Reference: Lu, X., H.-L. Liu, A. Z. Liu, J. Yue, J. M. McInerney, and Z. H. Li, Momentum budget of the migrating diurnal tide in the Whole Atmosphere Community Climate Model, J. Geophys. Res., 117, D07112, doi:10.1029/2011JD017089, 2012.