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.

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AIM Graphic
Momentum Budget of the Migrating Diurnal Tide

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.


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