The Solar granulation in different heights

Intensity images and Doppler-velocity maps of the quiet sun in different he ights are obtained from simultaneously recorded spectra of different lines. A relation between the intensity images is recognizable up to formation he ights of 900 km above continuum, but the correlation coefficient changes si gn above 400 km. The core of H-alpha shows a different pattern without any correlation to the continuum layer. Extreme Doppler velocities as well as t he rms-velocities have minima at a height of 400 km, values of about 2 km/s occur in deep photospheric layers and 2.5 km/s in a height of 900 km. The velocities in the lower and in the upper photosphere are well correlated in dicating that the pattern of the velocity field is preserved up to higher l ayers than the intensity pattern. H-alpha-velocities reach values up to 10 km/s and more, they show no correlation with the continuum intensities and almost no with the line core intensities.