
doi: 10.1007/bf00149803
A study of supergranule motions confirms horizontal velocities with peak values of typically 0.36 km s−1 as observed in Fe i 8688 A. These show no significant variation with height over the range of formation of C i 9111, Fe i 8688, and Mg i 8806, but there is a substantial reduction to about one-half of this at the level of Ca ii 8542.
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