Column density weighted average temperature distribution of the ECC clumps as a function of Galactic longitude for the 43 objects (top, four sources in the Galactic center region and a low column density source are excluded; see details in Sect. 3.3) and as a function of Galactocentric distance for the 35 clumps with available distance and average temperature estimates (bottom). Red symbols indicate the clumps without 70 μm point sources.