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Tidal Signatures in the upper Atmosphere from the Equator to the Pole Chao Xiong 1, Hermann Lhr 1, Claudia Stolle 1, and Jorge Chau 2 1. Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany. 2. Leibniz Institute of Atmospheric Physics, Khlungsborn, Germany. DFG-SPP 1788 DynamicEarth GFZ Potsdam, 03-04 July, 2014

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WN4 and WN3 as well as Midlatitude Summer Night Anomaly (MSNA) Equatorial region ? Northern hemi Southern hemi Weddell Sea Anomaly (WSA), first observed by an ionosode in the 1950s (Bellchambers and Piggott, 1958; Penndorf, 1965). Midlatitude Summer Night Anomaly (MSNA) observed by satellites observations (Lin et al., 2009; Thampi et al., 2010; Liu et al., 209). (Liu et al., 2010) (Lhr and Manoj., 2013) Equatorial Electrojet Electron density

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Wave-1 and Wave-2 patterns of MSNA in the two hemispheres (Xiong and Lhr., 2014) Electron density Thermospheric mass density CHAMP -40~-60 MLAT GRACE 40~60 MLAT

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Swarm Observations during solstice seasons Swarm-ASwarm-BSwarm-C Swarm-ASwarm-BSwarm-C Dec. S. 2013 Southern hemisphere June. S. 2013 Northern hemisphere

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The opportunity Swarm provides us Pole Equator Ionosphere-Thermosphere (IT) Lower Atmosphere Mesopause 0 km 500 km Tides Atmosphere-Ionosphere Coupling by Tides & Planetary Waves plasma flow tidal penetra tion B E tidal dynam o tidal dissipation O3H2OO3H2O Tides Atmosphere-Space Interaction Region PWs E equator ial anomal y compositio n changes wind transpo rt The primary mechanism through which energy and momentum are transferred from the lower atmosphere to the upper atmosphere and ionosphere is through the generation and propagation of waves (Forbes et al., 2014). The Swarm constellation provides us good opportunity for better understanding the Atmosphere- Ionosphere (AI) coupling mechanisms at different latitude regions: 1. Analyzing the tidal signatures of ionospheric and thermosperic quantities. 2. Compare the tidal signatures at different altitudes. 3. Compare the Swarm in situ observations with groundbased measuremtns, to separate the different sources of the tides.