can see that the projected plume 1 and the corresponding slit position are consistent.

The time at which the SUMER slit passes through the centers of the three plumes 0, 1 and 2 are April 8 02:00 UTC, April 8 01:00 UTC and April 7 22:00 UTC, is less than four hours after the EUVI observations. Due to the inclination of these three plumes, they are scanned by SUMER for about 2.5 h, 2 h and 1 h, respectively. We have checked the EUVI images at April 8 02:00 UTC, April 8 01:00 UTC and found that plume 0 and 1 were still present though the plumes appeared more diffuse at 02:00 UTC. For plume 3, we could not make a comparison because the time difference between the EUVI observation and the corresponding time at which it was scanned by SUMER is too large. Plume 4 in the EUVI observation lies outside the field of view of the SUMER scan. In Figure \[fig:sumer\_dentem\], the plus signs are the projections of the 3D plumes reconstructed from two EUVI images, the solid lines are their extrapolations outwards. We somewhat arbitrarily choose the upper end of height profile where the temperature by SUMER 