(Oktober 2011)

The centennial variations of the Universal Time UT1 and Length of Day LOD are investigated by means of long historical observational series of UT1 and LOD variations, which cover time span more than 3 centuries long. The correlation between the centennial cycles of the Earth rotation, climate and Total Solar Irradiance TSI is determined using the time series of North America temperature (2.2Ka) and precipitation (8Ka), Mean Sea Level MSL variations at Stockholm tide gauge station since 1774 and reconstructed TSI variations since 843. The model of the solar influences on the centennial and decadal cycles of the Earth rotation is based on a main centennial cycle and harmonics, ending by oscillation with period around 9a.