SOLAR VELOCITY FIELDS: FIVE MINUTE OSCILLATIONS AND SUPERGRANULATION.
CALIFORNIA UNIV BERKELEY SPACE SCIENCES LAB
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On dimensional magnetograph scans have been used to study the five-minute photospheric velocity oscillations and the supergranulation. The oscillations in wing brightness lead the oscillations in velocity by less than 90 degrees in the photosphere, and about 90 degrees in the chromosphere, suggesting that they are waves at lower levels and standing waves at higher levels. Downward flows have been observed to be coincident with the chromospheric network confirming the hypothesis that material is flowing downward at supergranular boundaries. Author