The total photospheric motion field

Details The total photospheric motion field The total photospheric motion field

Nov 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975soph...45...25g&link_type=abstract

Solar Physics, vol. 45, Nov. 1975, p. 25-33.

Physics

11

Atmospheric Circulation, Chromosphere, Photosphere, Solar Physics, Atmospheric Turbulence, Thermodynamic Equilibrium, Velocity Distribution

Scientific paper

A brief summary is given of recent investigations which show the dependence of the total velocity amplitude of the photospheric motion field on depth and direction. The results of these studies are used to deduce the radial and tangential components of the total photospheric motion field. The calculations indicate that macroturbulent wave motions whose velocity amplitude increases with depth are predominant in high photospheric layers and that macroturbulent velocities at deeper levels are mainly due to convection. Differences between the depths of the maximum values of the radial and tangential components are attributed to the effects of convection cells. It is shown that the data on the velocity amplitude of the total photospheric motion field may be used directly to compute weak or moderately weak Fraunhofer lines.

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