Solar Activity and Relationships Between Astronomy and the Geosciences

D. Djurović

Nowadays we dispose with a few observational indications that solar activity contributes in the tropospheric circulation and the climate instability. On the other hand, it is already known that the global variation of the atmospheric angular momentum causes a short-period fluctuations of the length of day. So, solar activity represents a phenomenon of interest for astrophysics, astrometry and the geosciences.