On links between global temperature and solar activity

We show that variations of monthly values of global surface air temperature have been dominated by a specific oscillation (with a period equal to that of the 11 year sunspot cycle) together with it second harmonic from 1990 up to the present time. This specific oscillation (upon which its second harmonic is superimposed) phase-leads the 11 year sunspot cycle by about 65^°, and has its last maximum in 1998. The second harmonic of this oscillation has maxima at 1998 and 2002, hence making 1998 and 2002 the warmest year and second warmest year on record world-wide, respectively. Some specific association is also given between El Ni no events and the latter second harmonic as well as the annual/seasonal heat/temperature cycle. Furthermore, an explanation (associated with solar activity) is given for the global warm spell which occurred in July-August 2003.