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

基于我们在DFG优先计划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重要性的普遍认识的进展，我们将继续进行CAWSES项目“Helioceases”来计算宇宙线通量在较长时间内的变化。这将是第一次在混合模型的框架内重建宇宙射线通量。后者自洽地考虑到高能粒子在与星际环境相互作用的动态日光层中的传输，并将根据旅行者号最近在日鞘中的观测结果加以改进。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建模的一项投入。后者的结果，除了电离剖面和中子产生率，将是一个时间序列的估计宇宙成因同位素生产与数据自然存档的冰芯进行比较。我们的研究的一个新的方面将是我们的建模的额外验证，通过使用CAWSES相关的EISCAT设施，以获得测量的大气电离。通过这种方式，将达到“太阳成因”的目标，即确定日光层对太阳-地球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.