[ACG35-P11] Historical regional and sectoral contributions to climate change
Keywords:region emissions, sector emissions, climate change contribution, simple climate model
First, current emissions with relative long lifetime like CO2 and N2O, from developing countries increase significantly, like China, India, Mexico and Brazil, however, their contributions to climate change are still relatively smaller, compared with the developed countries such as USA, Japan, Germany, Canada and UK, of which countries the cumulative emissions are in relatively larger scale and current emissions are already under controlled. We can conclude here that the GHGs with relatively long lifetime need to be controlled stringently to reduce the long-term effects on climate change. For CH4, which has a relatively shorter lifetime, the contributions to climate change are closely related to emissions within recent decades. These imply that reductions on short lifetime emissions can make immediate alleviation regarding climate change.
Second, energy sector contributes most of the CO2 emissions, and therefore contribute almost half to the climate change among all the sectors. However, for CH4 and N2O, agriculture sector contributes most of the emissions and therefore their contributions to climate change are remarkable. Reduction policiesneed to targetthesesectors. In addition, CO2 from land transportation and CH4 from waste treatment increase rapidly in recent years, attention also needs to be paid to these sectors for making climate change policies.