Qu, JohnShao, Min2018-10-222018-10-222017https://hdl.handle.net/1920/11238The troposphere and stratosphere are the two closest atmospheric layers to the Earth’s surface. These two layers are separated by the so-called tropopause. On one hand, these two layers are largely distinguished, on the other hand, lots of evidences proved that connections are also existed between these two layers via various dynamical and chemical feedbacks. Both tropospheric and stratospheric waves can propagate through the tropopause and affect the down streams, despite the fact that this propagation of waves is relatively weaker than the internal interactions in both atmospheric layers.230 pagesenCopyright 2017 Min ShaoAtmospheric sciencesData AssimilationNumerical Weather PredictionRemote SensingStratosphereTroposphereDissertation