Time-dependent transport of energetic particles in the atmosphere, magnetosphere and heliosphere, reconstruction of the long-term flux heliospheric environment, atmospheric ionisation, production of neutrons and cosmogenic isotopes

基于dfg优先项目CAWSES第二阶段取得的进展，以及近年来对高能带电粒子对地球大气意义的一般认识的进展，我们将继续进行CAWSES项目“Heliocauses”，以计算长时间内宇宙射线通量的变化。这将是在混合模型框架内首次重建宇宙射线通量。后者自一致地考虑了高能粒子在动态日球层中与星际环境相互作用的传输，并将在最近旅行者号在日球鞘的观测中得到改进。宇宙射线通量重建将以地球轨道能谱的形式提供，并作为我们对宇宙射线与地球大气相互作用的建模的输入。后者的结果，除了电离剖面和中子产生率外，还将是估计宇宙形成同位素产生的时间序列，以便与冰芯中自然存档的数据进行比较。我们研究的一个新方面将是通过使用与cawses相关的EISCAT设施来获得大气电离的测量，从而进一步验证我们的模型。这样就能达到“日成因”的目标，即确定日球层对日地系统气候和天气的影响。

Based on the progress we made during the second phase of the DFG-priority programm CAWSES and on the advance in the general understanding of the significance of energetic charged particles for the terrestrial atmosphere has been made during recent years, we will proceed with the CAWSES-project 'Heliocauses' to compute the cosmic ray flux variations over extended time periods. This will be the first reconstruction of the cosmic ray flux within the framework of a hybrid model. The latter takes self-consistently into account the transport of energetic particles in a dynamical heliosphere that is interacting with the interstellar environment and will be improved in view of the recent Voyager observations in the heliosheath. The cosmic ray flux reconstruction will be available in terms of energy spectra at the Earth orbit and serve as an input to our modelling of the interaction of cosmic rays with the terrestrial atmosphere. The result of the latter, besides ionisation profiles and neutron production rates, will be a time series of the estimated cosmogenic isotope production to be compared with data naturally archived in ice cores. A new aspect of our research will be the additional validation of our modelling by the use of the CAWSES-re lated EISCAT facility to obtain measurements of the atmospheric ionisation. This way the goal of 'Heliocauses' will be reached, namely to determine the heliospheric influences on the climate and weather of the Sun-Earth system.