The total photospheric motion field

Brief consideration is given to the conception of the total photospheric motion field. A synthesis of the most thorough investigations is made and the radial (V ^rad) and tangential (V ^tg) components of the velocity amplitude of the total photospheric motion field are deduced. At depth logτ₅ = ?3.0 V ^rad and V ^tg have average values of 1.2 and 1.7 km s^?1 respectively. They increase smoothly with depth and reach their maximum values of V ^rad=3.0, V ^tg=3.4 km s^?1 at depths logτ₅= ?0.2 and logτ₅ = +0.4 respectively. In the deep photospheric layers both components seem to decrease with depth.