  A complete understanding of Doppler shift in active region loops can help
probe the basic physical mechanism involved into the heating of those loops.
Here we present observations of upflows in coronal loops detected in a range of
temperature temperatures (log T=5.8 - 6.2). The loop was not discernible above
these temperatures. The speed of upflow was strongest at the footpoint and
decreased with height. The upflow speed at the footpoint was about 20 km/s in
Fe VIII which decreased with temperature being about 13 km/s in Fe X, about 8
km/s in Fe XII and about 4 km/s in FeXIII. To the best of our knowledge this is
the first observation providing evidence of upflow of plasma in coronal loop
structures at these temperatures. We interpret these observations as evidence
of chromospheric evaporation in quasi-static coronal loops.

Solar and Stellar Astrophysics