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2018/12/26(三)13:00綜合大樓1樓48111B教室演講 : 張滋芳 特任助理教授(日本名古屋大學宇宙地球環境研究所)

張貼者:2018年12月20日 下午6:11Dabby Lu   [ Ann-Chen Jang 已於 2018年12月21日 上午12:52 更新 ]
講題:From investigation of magnetospheric substorms to development of space weather research
摘要:THEMIS satellites clustered at substorm orbit together with optical observations from the ground or space make it possible for us to investigate substorm events practically. New constraints on substorm onset phenomena have been firmly built after the launch of THEMIS project. The clearest constraint comes from activations of azimuthally-spaced auroral forms manifested before breakup initiation. Pi2 disturbances are identified from the ground and space prior to substorm onsets and throughout substorm events. On the other hand, substorms inject energetic particles to inner magnetosphere which may become an important source of particles with relativistic energies. ERG satellite observes the entire radiation belts and provides critical data for developing models which give variations of radiation belts and inner magnetosphere. The enhancement in electron fluxes during substorms can be a few orders larger than the pre-onset conditions. Thus substorm-associated fields must be taken into consideration regarding modeling of radiation belt electron populations. We build a substorm injection model and successfully produce the main features of flux evolution captured in multi-satellite observations. Radiation belts models or global magnetosphere models which consider variations at whole MLT and L-shells can include fields of substorms by coupling our model and thus provide more refined results closer to realities to explore local particle accelerations up to relativistic energies, or to even further develop the feasible capabilities related to space weather forecast. In the end of this talk, I will also introduce my future research plans and directions.
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Ann-Chen Jang,
2018年12月21日 上午12:52
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