Variabilitatea de termen lung a câmpului magnetic terestruîn relaţie cu procese fizice din heliosferă

PROJECT DESCRIPTION

The project aims at developing research work, which has been carried out for several years in the Institute of Geodynamics on the terrestrial magnetic field at global and regional scales, with a special view on its variability in relation with physical processes in the heliosphere. Specific objectives which concern the new aspects evidenced by this research team in previous work are: (1) studies on the spatial distribution and temporal evolution of the main geomagnetic field, at a global level, on observatory and satellite models data, and at a regional level (Europe, Romania) on geomagnetic repeat station data from national networks; (2) the analysis of the geomagnetic activity in relation with the heliospheric variability (solar wind, heliospheric magnetic field); (3) analysis of the medium- and long-term variability of magnetosphere morphology induced by the variations of the main geomagnetic field. The novelty elements in view are: (a) the constituents of the main geomagnetic field and of geomagnetic jerks (steady field and ~80-, 22- and 11-year) and contributions to clarifying their sources; (b) palaeomagnetic research in the Eastern Carpathians; (c) using long-term external variations in deciphering the lateral distribution of magnetic and electrical properties of crust and mantle; (d) medium- and long-term variability of heliosphere (solar wind parameters, heliospheric magnetic field); (e) possible direct influences of heliospheric variability on dynamo type physical processes in the outer core of the Earth; (f) medium- and long-term variations of magnetosphere dimensions and orientation induced by corresponding variations of the main geomagnetic field.