All the targets use the National Atmospheric Emissions Inventory (NAEI) disaggregated greenhouse gas inventory and estimates of greenhouse gas emissions from international aviation and shipping as the main evidence source.
Information on trading in carbon units under the European Union Emissions Trading System (EU ETS) are collected by the Scottish Environment Protection Agency and the Environment Agency (EA).
The inventory data are those currently published by Ricardo Energy & Environment under contract to Department of Energy and Climate Change (DECC), Scottish Government (SG), Welsh Government and Department of the Environment in Northern Ireland. Ricardo Energy & Environment conduct detailed quality assurance.
Emissions will be published in the environment statistics section of the SG website: http://www.gov.scot/Topics/Statistics/Browse/Environment
The emissions figures are those published in "Greenhouse gas inventories for England, Scotland, Wales and Northern Ireland" on the NAEI website.
The indicator uses the sum of the greenhouse gas emissions assigned to Scotland in the disaggregated greenhouse gas inventory (taking account of any removals such as those resulting from afforestation) and the emissions from international aviation and shipping, expressed as tonnes of carbon dioxide equivalent. These emissions are adjusted for trading within the EU Emissions Trading Scheme and the background to this is outlined below.
ESTIMATED EMISSIONS ADJUSTED FOR TRADING WITHIN THE EU EMISSIONS TRADING SCHEME (EU ETS)
Scotland in the EU ETS
The EU ETS contributes to delivering Scotland’s Climate Change Targets through incentivising the reduction in emissions from Scottish organisations participating in the scheme. In 2014, there were 77 Scottish installations that surrendered emissions allowances in the EU ETS.
What are ‘traded emissions’ and ‘non-traded emissions’?
In the greenhouse gas inventory, source emissions can be categorised into traded and non-traded. Traded emissions capture those that come from installations covered by the EU ETS, whereas non-traded emissions are those which do not fall within the scope of the EU ETS. The emissions from some sectors, such as the residential sector, are completely non-traded whereas emissions from other sectors, such as energy supply, business and industrial process are a combination of traded and non-traded. For 2014, CO2 emissions from domestic and international aviation are estimated as being within the traded sector.
What are adjusted emissions and the Net Scottish Emissions Account (NSEA)?
The Scottish climate change targets are assessed against the Net Scottish Emissions Account (NSEA), which is detailed in the Climate Change (Scotland) Act 2009 and has been reported for each of the years from 2010 to 2014 as part of the Act. The NSEA accounts for the greenhouse gas emissions from sources in Scotland, Scotland's share of emissions from international aviation and international shipping, the effect of any relevant emissions removals (e.g. "carbon sinks" such as woodland) and the effect of the sale and purchase of relevant carbon units (tradable emissions allowances) in the EU ETS.
The EU ETS element of the NSEA is calculated by taking the difference between Scotland’s notional share of the overall EU ETS cap and the number of emissions allowances surrendered from Scottish installations in a given year. This amount is then added to non-traded net emissions to get the NSEA.
In summary, Net Scottish Emissions Account =
Net greenhouse gas emissions, including international aviation and shipping – EU ETS surrenders + Scotland’s share of the EU ETS cap “specified amount”
The EU ETS was introduced in 2005; a similar adjustment was reported for all years since then.