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13. IPCC Special Report on Emission Scenarios is based on a set four storylines that weave demographic, technological, and economic driving forces into four distance scenarios that can be translated into future emissions. One of the defined scenarios, in China and centrally planned Aisa, averaged annual growth rate of population is 1.03%, GDP per capita growth rate is 3.91%, growth rate of energy intensity is -1.73% and carbon intensity growth rate is -0.32%. Assume the atmospheric fraction constant at 0.38. Climate sensitivity parameter AT2x for a doubling of CO2 is 3°C. In 2019, the initial CO2 concentration is 400 ppm, the energy-related emission rate is 8.0 GtC/yr, and the initial atmospheric carbon content is 848 GtC. Land-use emission rate is a constant 5.5 GtC/yr: (a) Estimate the carbon emission rate in 2079 and total carbon emission from 2019 to 2079. (5 marks) (b) What would be CO2 concentration in 2079? (3 marks) (c) Estimate CO2-induced global equilibrium temperature increase in 2079 (4 marks) (d) If those growth rates continue, in what year would CO2 concentrations be equal to double the initial 400 ppm? (4 marks)