Insolation Contrast and Trends in Modern Climate Change

On the basis of calculations of the Earth's insolation, the changes in the annual meridional insolation gradient from 3000 BCE to 2999 CE were determined. Changes in the meridional insolation gradient are associated with a change in the angle of inclination of the Earth's rotation axis. A regression model was used to show that the trends in changes in surface air temperature and sea surface temperature (the temperature regime of the global climate) are determined by 69.3-84.1% by insolation contrast. The insolation contrast generally (over the regions of source and sink of radiative heat) reflects long-term changes in the meridional insolation gradient that regulates the meridional transfer of radiative heat in the ocean-atmosphere system.