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Taking into account the fact of global economic integration, this paper improves the RICE model and the MRICES model, and establishes a new integrated assessment model MRICES-2012, which takes Ramsey utility as the standard of fairness. Based on the model, schemes which meet the global emission mitigation targets as well as the interests of developing countries are simulated to assess the international fairness of emission reduction. Therefore, a new feasible scheme is proposed, which can not only reach the Copenhagen Consensus but also ensure interests of every country. Specifically speaking, the US and Japan cut emissions 80% and 70% respectively by 2050 relative to the 1990 level; the EU and other developed countries cut 80% by 2050 relative to 1990 level; high human development countries cut 50% by 2050 relative to 1990 level; all above-mentioned countries start emission reduction from 2020 and keep emission on 2050 level by 2100; China begins emission reduction from 2030 and cuts emission 15% by 2050 and 25% by 2100 relative to 2005 level; medium human development countries keep emission on 2020 level by 2100; low human development countries do not take part in reduction on emission intensity and global emission. [ABSTRACT FROM AUTHOR]

Global warming tends to be the major characteristics of the dramatic global climate change. To deal with these changes, the impact of reducing greenhouse gas (GHG) emission on Chinese future economic and social development has to be assessed. In this paper, a Regional Integrated model of Climate and the Economy (RICE), which is well known and accepted widely, has been used for Chinese economic assessment of climate change after introduction, assimilation and verification. Based on a sensitivity analysis of technical parameters in the RICE model and constrained targets proposed for energy saving and emissions reduction technological advance programs of China from 2000 to 2050, the economic impact of the programs is examined. The results indicate that when technology advances, Chinese CO2 emission, climate loss, and the growth rate of atmospheric CO2 concentration and temperature will all decrease. It is assumed that in 2010, the CO2 emission is 20% lower than in 2005, CO2 emission in 2050 would only double the level in 2000, the accumulative CO2 emission would be decreased by 12.4 GtC, and the atmospheric CO2 concentration and temperature in 2050 would reduce by 35 GtC and 0.04°C respectively from 2000 to 2050. The accumulative climate loss from 2000 to 2050 will drop down by 4.6 billion dollar, which only accounts for 6% of the global total benefits. However, the economic benefit the developed countries will obtain is 10 times that for China under such a technological advance scenario. The decrease of the CO2 emission control rate is 1% in cooperation policy while 4.6% in non-cooperation policy, which would relieve China's burden in the control of CO2 total emission and thereby benefit China in participation of the international cooperation for CO2 emission reduction. [ABSTRACT FROM AUTHOR]