The Influence of Energetic Particles on the Chemistry of the Middle Atmosphere

摘要: Energetic particle precipitation (EPP) during solar and geomagnetic active periods causes chemical disturbances in the lower thermosphere middle atmosphere. Additional HOx (H, OH, HO2) NOx (N, NO, NO2) are produced atmosphere, enhancements of these events can be transported to winter stratosphere. These trace species take part ozone chemistry and, by chemical-radiative coupling, dynamical state atmosphere altered. There is evidence both from observations chemistry-climate models that EPP induced signal may then propagate into troposphere. Thus could connect possible climate effects. The first step this functional chain impact on composition thermosphere, downward transport polar general objective project was assess quantitatively change combining model simulations observations. study relays mainly MIPAS instrument ENVISAT satellite, whose data set has been expanded context a newly developed retrieval gas H2O2, reservoir for members family. Simulations have carried out with two CLaMS KASIMA, which cover effects stratosphere up mesosphere/lower region. global NOy budget (the resulting) total assessed studies. In addition, ion reaction mechanism conversion N2O5 HNO3 based positive refined. detailed comparison results observation SPE 2003 showed simulate but deficiencies exist some minor species.