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The Sun's Supergranulation

Rieutord, Michel; Rincon, François

The Sun's supergranulation refers to a physical pattern covering the surface of the quiet Sun with a typical horizontal scale of approximately 30,000 km and a lifetime of around 1.8 d. Its most noticeable observable signature is as a fluctuating velocity field of 360 m s^t-1 rms whose components are mostly horizontal. Supergranulation wa…