Figure TS.5: Carbon in oil,
gas and coal reserves and resources compared with historic fossil fuel carbon
emissions 1860-1998, and with cumulative carbon emissions from a range of SRES
scenarios and TAR stabilization scenarios up until 2100. Data for reserves and
resources are shown in the left hand columns. Unconventional oil and gas includes
tar sands, shale oil, other heavy oil, coal bed methane, deep geopressured gas,
gas in acquifers, etc. Gas hydrates (clathrates) that amount to an estimated 12,000
GtC are not shown. The scenario columns show both SRES reference scenarios as
well as scenarios which lead to stabilization of CO2 concentrations
at a range of levels. Note that if by 2100 cumulative emissions associated with
SRES scenarios are equal to or smaller than those for stabilization scenarios,
this does not imply that these scenarios equally lead to stabilization.
