Fig. 3.

Left) The travel footprint associated with the 4 IPCC WGI Lead Author Meetings, based on the DEFRA emission factors and assuming a minimum distance for flying of 700 km. The footprint is computed at the city of minimum emission (bottom bar of each sub-panel), for an intermediate city host (middle bar of each sub-panel), and finally for the host city of the meeting (top bar of each sub-panel). Right) The total travel distance to reach the various city hosts is plotted in millions of km. Barcelona refers to the city of Venezuela