As can be seen in this diagram, the length of the solar day has varied
considerably the last century. But the diagram is incomplete and doesn't show the very last years. Can anyone tell me how this graph would proceed and where it would be today, if extended using data from recent years?
It appears the rotation speed of Earth and thereby length of the solar day varies more from month to month than it does from year to year. What I am looking for is the average solar day length over a period of a year, and by how much it differs from 24*60*60 seconds.
I would also appreciate links to raw data that I can use to create my own graph.