On the supposed anticorrelation of solar polar and equatorial rotation rates.
Abstract
Howard and Harvey (1970) analyzed Mt. Wilson Doppler shifts to obtain a daily measure of the Sun's differential rotation. The data were fitted to give an angular velocity of the form ω = a + b sin^{2}B + c sin^{4}B (B = heliographic latitude). Changes in a, b, c were found to be correlated (Howard and Harvey, 1970). Yoshimura (1972) used the anticorrelation of the b and c parameters to infer the existence of largescale convection. Wolff (1975) used the bc anticorrelation and a weak correlation between a and b to infer that variations of the Sun's polar and equatorial rotation rates are anticorrelated. In this paper, the anticorrelation of b and c is shown to be due to numerical coupling.
 Publication:

Solar Physics
 Pub Date:
 February 1978
 DOI:
 10.1007/BF00152485
 Bibcode:
 1978SoPh...56..463D
 Keywords:

 Correlation;
 Equators;
 Polar Regions;
 Solar Rotation;
 Least Squares Method;
 Random Noise;
 Solar Physics;
 Convection;
 Angular Velocity;
 Rotation Rate;
 Weak Correlation;
 Differential Rotation;
 Sun:Differential Rotation