Helioseismology of Time-Varying Flows Through The Solar Cycle |
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| Authors: | Laurent Gizon |
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| Institution: | (1) W.W. Hansen Experimental Physics Laboratory, Stanford University, Stanford, CA 94305, USA |
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| Abstract: | Flows in the upper convection zone are measured by helioseismology on a wide variety of scales. These include differential
rotation and meridional circulation, local flows around complexes of magnetic activity and sunspots, and convective flows.
The temporal evolution of flows through cycle 23 reveals connections between mass motions in the solar interior and the large-scale
characteristics of the magnetic cycle. Here I summarize the latest observations and their implications. Observations from
local helioseismology suggest that subsurface flows around active regions introduce a solar-cycle variation in the meridional
circulation. |
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