Abstract:<p>The impact of the stratospheric Quasi-Biennial Oscillations (QBO) and Semi-Annual Oscillations (SAO) and physics of gravity waves (GW) on the dynamics and transport in the Mesosphere and Lower Thermosphere (MLT) has been examined in simulations of two Whole Atmosphere Models (WAM and WACCM-X) during the last decade. In the low-latitude MLT the year-to-year variations of the diurnal tide amplitudes and mean flow of whole atmosphere simulations constrained below 40 km by reanalysis data are in t… Show more
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