High resolution {OV5) two-dimensional spectra performed with the Multichannel Soustractive Double Pass (MSDP) spectrograph of the Pie du Midi Observatory, were analysed. An adapted image processing provides two-dimensional intensity and velocity maps of the solar granulation at two intensity levels of the photospheric line NaD2, filtered for the 5 min oscillations. An inspection of such
maps confirms that the bright granules at the continuum level are well correlated witli rising material as well as the dark intergranular spaces with falling material, and that the velocity fluctuations
penetrate much high into the photosphere than the intensity fluctuations. The one-dimensional power spectrum has a slope close to - 5/3, characteristic of a turbulent medium, in the size range
of the granulation. It is suggested that the convectivc energy is supplied by the mesogranulation and the supergranulation; this energy is then cascading toward the smaller scales through the granulation, which thus appears to be turbulent.
We have studied the height dependent characteristics of the Evershed flow in the photosphere, chromosphere and chromosphere-corona transition region. We have used the Multichannel Subtractive Double Pass Spectrograph (MSDP) to
obtain line of sight velocity maps in Hα, the Meudon magnetograph for mapping the photospheric velocity field and the Ultraviolet Spectrometer and Polarimeter (UVSP) on the Solar Maximum Mission (SMM) spacecraft to obtain line of sight velocities in C IV, in sunspot regions. Our emphasis was on the large scale,
quasi-stationary characteristics of the flow. In the photosphere the velocity is low above the umbra and shows a maximum above the penumbra. In addition to the reversal of the flow in the chromosphere both the characteristic scale of the flow and the velocity are larger; the velocity maximum is located outside the photospheric penumbra. In the chromosphere-corona transition
region there is a clear tendency for a chromospheric-type Evershed effect with a predominantly horizontal flow. The velocity is greater than in the chromosphere, but the characteristic scale of the flow is about the same. In addition to the Evershed flow, C IV observations show upflows above the umbra with a velocity of about 15 km/sec.