China carbon emissions tool tests impact of radical energy policies – with prospects of emissions peak by 2025
By Gerard Wynn
Chinaâ€™s policymakers are testing the potential for radical cuts in carbon emissions from the energy and industrial sectors, using an energy analysis tool developed in collaboration with Britain.
Britain developed its own â€ś2050 Pathwaysâ€ť calculator in 2010, to allow academics and policymakers to test the potential for radical national carbon cuts in the wake of the UKâ€™s ambitious Climate Change Act.
The country has now helped China develop its own version, in collaboration with the Energy Research Institute (ERI).
ERI is based within and provides advice to the countryâ€™s powerful energy policymaking body, the National Development and Reform Commission (NDRC).
The â€śChina 2050 Pathwaysâ€ť tool is based on unpublished national energy and industrial data.
â€śThe data for this calculator is from the institute and many experts give us their suggestions,â€ť said Zhang Bo the developer of the pathway, at the â€śChina 2050 Pathways Development Groupâ€ť, in a brief email correspondence with RTCC.
The Chinese carbon pathways calculator certainly does not express government policy, but it does allow researchers and policymakers to test the carbon emissions outcomes of different policies.
Zhang has developed his own, â€śZhang Boâ€ť pathway which appears to test an ambitious combination of energy and industrial policies which lead to sharp cuts in carbon emissions.
His pathway experiments with high levels of installed solar power and low levels of coal by 2050, for example.
The resulting carbon emissions trajectory sees carbon emissions peak at 8.3 billion tonnes in 2025, before falling rapidly to just under three quarters of present levels by the middle of the century.
The big, unknown question is how far such experiments might influence actual policy.
The calculator calculates carbon emissions trajectories according to one of four scenarios for each of many variables, across energy, transport, industrial and urban sectors.
The most â€śpessimisticâ€ť scenario sees greenhouse gas emission rise from 7 billion tonnes in 2010 (an under-estimate even compared with CO2 emissions data from BP), to 9.3 billion tonnes in 2015, and peak at 16.2 billion tonnes in 2045.
That scenario assumes very low or zero uptake of low carbon technologies.
For example, it assumed less solar photovoltaic capacity in 2050 than the country already has, according to data from the European Photovoltaic Industry Association, at 10 gigawatts in 2050 compared with 19.6 GW at the end of 2013, respectively.
The most â€śoptimisticâ€ť scenario used by the calculator sees emissions peak now, and fall to 6.9 billion tonnes in 2015, and continue to fall thereafter, to 1.8 billion tonnes or just a quarter of present levels by the middle of the century.
The scenarios assume the most ambitious uptake of low carbon energy and reduction in fossil fuels, according to technical possibilities without accounting for economic cost.
For example, it assumed an installed hydropower capacity of 694 GW by 2050, compared with around 300 GW now, and compared with a generating capacity of the massive Three Gorges Dam of 22.5 GW.
The calculator provides a detailed overview of each variable.
â€śIn 2050, (hydrowpower) capacity reaches 690 kilowatts, the maximum capacity theorised for hydroelectricity in China,â€ť it says of the most ambitious hydropower scenario, for example.