Statistical analysis of EUV and UV lines inside and outside of solar coronal holes

Two studies performed with SUMER (the Solar Ultraviolet Measurements of Emi tted Radiation spectrometer on SOHO) in September 1996 are presented. Spati al scans, a long exposure time and a broad spectral window provide reliable line profiles for various regions of the Sun (off-limb corona, coronal hol e, quiet Sun, bright and dark regions on disk) and for different formation temperatures (Si II, 14 000 K; C IV, 100 000 K; Ne VIII, 630 000 K). Line i ntensity, position and width distributions are presented together with the line positions relative to the wavelength seen above the limb.