The purpose ofthis paper is to stress the importance of collaborative research using natural archives of the cosmogenic nuclei and of the nitrates generated in the Earth's atmosphere.Cosmogenic isotopes (14C, 10Be, 36C1 etc.) are produced in cosmic rays and gamma-ray nuclear interactions with the Earth's atmosphere. After their generation, cosmogenic isotopes participate in atmospheric processes, to finally enter the natural archives, such as tree rings, corals, polar ice cores, sea bottom sediments. In their memory, the cosmogenic isotopes retain information on the origin and propagation of cosmic rays in interstellar medium, in the geomagnetic field, and the Earth's atmosphere. Atomic collisions between the cosmic radiation and atmospheric atoms produce many electrons. As a result, the nitrates are generated. The Antarctic and Greenland act as cold traps capable to freezing the incoming signals and thus keeping them in memory.By measuring the abundance of cosmogenic isotopes and nitrates in dated natural archives, one can solve a number of astrophysical, geophysical and atmospheric problems. The available time interval is large, several hundredthousands ofyears. To ensure efficient use ofthese unique possibilities, cooperation between astrophysical, atmospheric and geophysical communities is necessary.We are dealing here primarily with the astrophysical and terrestrial phenomena which are at the focus of scientific attention, namely, the upper limit of total energy of solar flare-accelerated particles and the problem of the Tungus phenomenon.The solar magnetic field is considered presently as the only energy source of solar cosmic rays. First of all, because we have no other candidate; second, the measured solar magnetic field can, in principle, provide the energy necessary for the solar flares. Progress in experimental possibilities of determining the main characteristics of particles accelerated in a flare region reveals increasing difficulties of explaining the fatality of available data within one concept that the photospheric magnetic field is the only source of all particles and radiations emitted in a solar flare. On the other hand, the magnetic field is of limited strength, and so the total energy of the accelerated particles should have an upper limit. The point is how to measure it.Available experimental data show that the higher is the total energy of solar cosmic rays, the lower is the probability of their observation. Therefore, to get the maximum value, we need to perform measurements over a long time scale. At the moment, there is only one possibility to measure the total proton emission energy from the Sun on a long time scale. This possibility is connected with the highresolution measurements of the nitrate abundance in the polar ice (see and the radiocarbon abundance in the natural archives of cosmic rays: tree rings, corals, ice cores etc.It is known (see Kocharov, 1992, and references therein) that the radiocarbon abundance in tree rings is an indicator of galactic cosmic ray intensity in ...