Paper:	What is New with Zonal Flows?
Volume:	416, Solar-Stellar Dynamos as Revealed by Helio- and Asteroseismology: GONG 2008/SOHO 21
Page:	265
Authors:	Antia, H. M.; Basu, S.; Chitre, S. M.
Abstract:	We have used available helioseismic data for the solar cycle 23 to undertake a detailed study of temporal variations in solar rotation. We concentrate mainly on variation of the radial and latitudinal gradients of rotation. We find that the temporal variations of the rotation-rate gradients is about 20% or more than their average value, i.e., much larger than the relative variation in the rotation rate itself. These variations may play an important role in solar dynamo models.

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