Third IMO Greenhouse Gas Study 2014

58 Third IMO GHG Study 2014
Table 21 – Shipping CH 4 emissions compared with global CH 4 (values in thousand tonnes CH 4 )
Year Global CH 4
1
Total shipping CH 4
Third IMO GHG Study 2014
Percentage
of global
International shipping CH 4
Percentage
of global
Average 96,000 177 0.18% 174 0.18%
annual
196 0.20% 193 0.20%
CH 4 for
decade
187 0.20% 186 0.19%
2000–09
236 0.25% 234 0.24%
288 0.30% 286 0.30%
288 0.30% 287 0.30%
Average 229 0.24% 227 0.24%
1
Global comparator represents CH 4 from fossil fuel consumption and cement production. Source: IPCC (2013, Table 6.8).
Table 22 – Shipping N 2 O emissions compared with global N 2 O (values in thousand tonnes N 2 O)
Third IMO GHG Study 2014
Year Global N 2 O 1 Total shipping N 2 O
Percentage
Percentage
International shipping N
of global
2 O
of global
Average 700 50 7.1% 41 5.8%
annual
52 7.4% 43 6.1%
N 2 O for
decade
45 6.4% 40 5.7%
2000–09
42 6.0% 36 5.1%
45 6.4% 38 5.5%
43 6.1% 37 5.2%
Average 46 6.6% 39 5.6%
1
Global comparator represents N 2 O from fossil fuel consumption and cement production. Source: IPCC (2013, Table 6.9).
Table 23 – Shipping GHGs (in CO 2 e) compared with global GHGs (values in million tonnes CO 2 e)
Third IMO GHG Study 2014
Year Global CO 2 e 1 Total shipping CO 2 e
Percentage
Percentage
International shipping CO
of global
2 e
of global
2007 34,881 1,121 3.2% 903 2.6%
2008 35,677 1,157 3.2% 940 2.6%
2009 35,519 998 2.8% 873 2.5%
2010 37,085 935 2.5% 790 2.1%
2011 38,196 1,045 2.7% 871 2.3%
2012 39,113 961 2.5% 816 2.1%
Average 36,745 1,036 2.8% 866 2.4%
1 Global comparator represents N 2 O from fossil fuel consumption and cement production. Source: IPCC (2013, Table 6.9).
For the year 2012, total shipping emissions were approximately 938 million tonnes CO 2 and 961 million tonnes
CO 2 e for GHGs combining CO 2 , CH 4 and N 2 O. International shipping emissions for 2012 are estimated to be
796 million tonnes CO 2 and 816 million tonnes CO 2 e for GHGs combining CO 2 , CH 4 and N 2 O. International
shipping accounts for approximately 2.2% and 2.1% of CO 2 and GHGs on a CO 2 e basis, respectively.
Table 20 and Table 23 are also illustrated graphically in Figure 42 a) and b) respectively. The bar graphs may
show more intuitively that global CO 2 and CO 2 e are increasing at different rates than recently observed in
the bottom-up results for shipping presented here. In other words, ship fuel use, CO 2 emissions and GHG
emissions (on a CO 2 e basis) have trended nearly flat while estimated global totals of these emissions have
increased; this results in a recent-year decline in the percentage of shipping emissions as a fraction of global
totals.