The rotation rates range from about 34.0 days near the poles to about 25.2 days in the Sun's equatorial convective zone. The dotted line that is located ~ 0.7 solar radii out from the centre of the Sun marks the positions the Solar Tachocline. This represents the boundary between the core of the Sun, were the main form of energy transport is by radiation, and the outer convective layer of the Sun, where the main form of energy transport is by convection.
The diagram shows that mean rotation period at a point just below the equatorial Tachocline is ~ 26.3 days, while the mean rotation period in the equatorial mid-convective layer is ~ 25.2 days.
Amazingly, if the rotation period of the point just below the equatorial Tachocline was in fact 26.3365 days, you would get an amplified resonance between the tides of the two dominant tidal forcing Terrestrial planets, Venus and Earth.
Consider the case where the Earth and Venus are aligned in their orbits about the Sun, roughly above the Equator of the Sun (note: these planets can be located up to +/- 7 degrees from the Sun's equator). Take a
point (A) just below the Tachocline boundary that is right on the Sun's equator, and a point (B) that is dierctly above it, at the mid (radial) point in the equatorial convective layer of the Sun. In this configuration, the tidal bulges produced by the combined gravitational forces of Venus and Earth upon the convective layer of the Sun would be superimposed upon one another.
Interestingly, however, you would find that it took 28.38305 days for point A to rotate once around the Sun and then catch up to advacing line connecting the centre of the Sun to the Earth, and 28.38315 days for point B to rotate once around the Sun and then catch up to the advancing line connecting the centre of the Sun to Venus. The net effect being, that rougly every 28.38310 days, the initial tidal bulges produced by the alignment of Venus and Earth would be reinforced by the Earth at the equatorial Tachocline boundary (i.e. point A) and by Venus at the mid-point in the Sun's equatorial convective layer (i.e. point B). More importantly, this reinforcement would repeat 103 times every 28.38310 days, until Venus and Earth again realigned themselves in roughly the same part of the sky roughly 8.0 sidereal years later, where the whole cycle would start all over again. This happens because:
102.9504 x 28.38310 days = 2922.05150 days = 8.0000016 sidereal years
110.9504 x 26.3365 days = 2922.04521 days = 7.9999844 sidereal years
115.9544 x 25.2 days = 2922.05088 days = 7.9999999 sidereal years
Note that Venus and Earth Align rougly once every 1.599 sidereal years and that five these alignments is:
5 x 1.599 sidereal years = 7.9950 sidereal years (difference from 8.0000 sidereal years =1.8256 days !)
3 x SEM = 6.4059 years SEM = synodic period of Earth and Mars
7 x SVM = 6.3995 years SVM = synodic period of Venus and Mars
69 × SVJ = 44.770 yrs = synodic period of Venus & Jupiter
41 × SEJ = 44.774 yrs = synodic period of Earth & Jupiter
56 x 1.599 yrs = 89.544 yr
Which means that:
345 x Synodic period Venus/Jupiiter = 223.85 yrs
205 x Synodic period Earth/Jupiter = 223.87 yrs
100 x Synodic period Mars/Jupiter = 223.52 yrs
and that for the rotation periods of point A and B in the Sun's outer convective layers:
2883 x 28.38310 days = 81828.4773 days = 224.03026 (sidereal) years
3107 x 26.3365 days = 81827.5055 days = 224.02759 (sidereal) years
3247 x 25.2 days = 81824.400 days = 224.01901 (sidereal) years
with realignment errors of 1 to 3 days.
This is absolutely amazing!