Abstract
All countries committed to their own country's greenhouse gas emissions targets in Paris Agreement in 2015. At the same time, Paris agreement confirms that we aim to achieve long-term climate goal keeping the global mean temperature staying below 2 °C increase compare to preindustrial level. This study clarifies the implication of the short or mid-term emissions targets in the context of long-term climate mitigation goal by using AIM (Asia-Pacific Integrated Model). The global total emissions in the Paris agreement in 2030 are around 15GtCO2eq larger than that in least cost emissions pathways shown in IPCC AR5. This additional emission increases further required emission reduction in either former (2030 to 2050) or latter (2050-) part of this century. The additional reduction in the former period may need to consider rapid energy or socioeconomic system changes and tat in the latter period relies on large implementation of biomass combined with CCS or afforestation which realizes negative CO2 emissions eventually. Further reduction to the level of INDC would one of the options considering these difficulties when INDC is reviewed and revised in 2020.
