UN/ECE Classification of Emission Sources
The NAEI reports emissions from the combustion of fuels and non-combustion emissions from a range of sectors. The fuels data are taken from the Digest of UK Energy Statistics (DUKES), (DTI, 1999). Hence the fuel definitions and the choice of base sector categories used in the NAEI often reflect those in the DUKES publications. The choice of non-combustion sources generally reflects the availability of data on the emissions from specific activities.
The 1998 NAEI emission estimates are reported according to the UNECE/CORINAIR SNAP 94 Version 1.0 eleven sector classification which is less detailed than the NAEI base categories. A listing of the NAEI base categories and their mapping onto the UNECE/CORINAIR SNAP 94 categories is shown in Table A1 below. In some cases the NAEI categories shown here are aggregates of more detailed emission sectors. The sectors are presented in this way in Table A1to allow an in depth understanding of the source sector content without presenting an excessive amount of information. In addition, the names of several NAEI categories have been changed to enable a fuller understanding by those not familiar with some of the nomenclature.
At the least detail level, there are 11 categories for the UN/ECE emission inventory format. These are as follow:-
01 Combustion in Energy Production & Transformation
02 Combustion in Commercial, Institutional & Residential & Agriculture
03 Combustion in Industry
04 Production Processes
05 Extraction & Distribution of Fossil Fuels
06 Solvent Use
07 Road Transport
08 Other Transport & Mobile Machinery
09 Waste Treatment & Disposal
10 Agriculture Forestry & Land Use Change
11 Nature
The allocation of a particular source to one of these sectors is well defined and given in more detail in Table A1. The majority of allocations are easy to understand. For example, emissions arising from fuel combustion in the manufacture of glass will come under "03 Combustion in Industry". Emission arising from the manufacture/handling of the glass material itself and the raw materials will come under "04 Production Processes".
Table A1 Mapping of NAEI Base Categories to CORINAIR SNAP 94
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CORINAIR SNAP 94 Source Category |
NAEI Class |
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01 Combustion in Energy Production & Transformation |
Coke Production |
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Collieries |
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Gas Production |
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Nuclear Fuel Production |
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Offshore- own gas use |
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Power Stations |
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Refineries- Combustion activities only |
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Solid Smokeless Fuel Production |
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Town Gas Production |
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02 Combustion in Commercial, Institutional & Residential & Agriculture |
Accidental Fires |
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Agricultural Combustion |
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Domestic Combustion |
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Miscellaneous |
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Other Non-Industrial Combustion |
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Public Services (Public buildings etc.) |
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Railways (Stationary sources only) |
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03 Combustion in Industry |
Ammonia Combustion |
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Power Station supplying to industrial activities only |
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Cement & Lime Production- Combustion activities |
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Cement (combustion for non-decarbonising activities) |
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Ceramic manufacture |
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Glass Production |
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Iron and Steel (Blast Furnaces) |
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Iron and Steel (Combustion) |
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Iron and Steel (Grey Iron Foundry) |
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Iron and Steel (Sinter Plant) |
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Lead Crystal Glass Production |
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Lime Production (Combustion) |
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Nickel Production |
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Primary Copper Production |
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Primary Lead Production |
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Primary Lead-Zinc Production |
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Secondary Aluminium Smelting |
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Secondary Copper |
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Secondary Lead |
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Other industry- Combustion activities |
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Table A1 Continued..
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CORINAIR SNAP 94 Source Category |
NAEI Class |
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04 Production Processes |
Adipic Acid Production |
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Ammonia Production and use of feedstocks |
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Bread Baking |
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Brewing |
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Cement and Concrete Batching |
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Cement (decarbonising activities) |
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Chemical industry (Organic Chemicals) |
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Chloroalkali Industry |
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Cider Manufacture |
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Coke Production (Door Leakage) |
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Building/Construction and Road Construction |
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Glass Production (non fuel combustion emissions) |
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Iron and Steel (Ni-Cr Use, Steel Pickling, Furnaces, Flaring) |
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Lead Mining (Dewatering) |
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Lime Production (Decarbonising) |
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Magnesium alloying |
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Nitric Acid Production |
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Non-Ferrous Metals (Other non-ferrous metals) |
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Aluminium Production (General) |
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Primary Zinc Production |
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Tin Production |
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Other Food (animal feed;cakes, biscuits, cereals; coffee, margerine and other solid fats; meat ,fish and poultry; sugar) |
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Asphalt Manufacture |
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Other Industrial Processes |
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Phosphate Fertiliser Production |
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Pigments & Stabilisers |
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Quarrying |
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Refineries (drainage, process & tankage) |
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Rolling Mills (Hot & Cold Rolling) |
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Solid Smokeless Fuel Production |
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Spirit Manufacture |
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Sugar Beet processing |
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Sulphuric Acid Production |
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Textile Coating |
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Wine Manufacture |
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Wood Impregnation |
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Table A1 Continued….
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CORINAIR SNAP 94 Source Category |
NAEI Class |
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05 Extraction & Distribution of Fossil Fuels |
Coal Storage & Transport |
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Deep-Mined Coal |
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Gas Leakage from Pipes etc. |
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Gasification Processes |
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Offshore Loading of fuel |
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Offshore Oil & Gas |
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Oil Terminal Storage |
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Onshore loading of fuel |
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Open-Cast Coal |
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Petrol distribution (storage, dispatch, petrol stations, delivery tankers) |
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Petroleum Processes |
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06 Solvent Use |
Aerosols (Car care, Cosmetics & toiletries, household products) |
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Agrochemicals use |
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Coating manufacture (glue, ink, paint) |
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Creosote use |
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Decorative paint |
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Dry cleaning |
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Film coating |
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Industrial adhesives |
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Industrial coatings (automotive, coil coating, commercial vehicles, heavy duty, marine, metal and plastic, metal packaging, vehicle refinishing, wood) |
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Leather degreasing |
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Leather coating |
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non aerosol products (household, automotive, cosmetics & toiletries, adhesives and sealants, paint thinner or remover) |
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Other rubber products |
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Other solvent use |
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Paper Coating |
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Printing |
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Seed Oil Extraction |
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Surface cleaning |
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Textile coating |
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Tyre Manufacture |
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Wood impregnation |
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Table A1 Continued….
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CORINAIR SNAP 94 Source Category |
NAEI Class |
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07 Road Transport |
Road transport (buses) |
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Road transport (cars) |
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Road transport (cars CAT) |
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Road transport (cars non CAT) |
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Road transport (HGV Articulated) |
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Road transport (HGV rigid) |
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Road transport (LGVs) |
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Road transport (LGVs CAT) |
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Road transport (LGVs non CAT) |
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Road transport (motorcycles) |
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08 Other Transport & Mobile Machinery |
Agricultural Power Units |
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Aircraft (Military) |
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Aircraft Support vehicles etc. |
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Aircraft Take-Off and Landing (domestic) |
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Aircraft Take-Off and Landing (international) |
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Shipping (UK shipping up to 12 km of coastline) |
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Domestic House and Garden machinery |
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Fishing |
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Other Industry Off-Road (e.g. forklifts etc.) |
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Railways (Freight) |
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Railways (Intercity) |
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Railways (Regional) |
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Shipping Naval |
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09 Waste Treatment & Disposal |
Batteries |
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Electrical Equipment |
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Incineration |
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Landfill |
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Lighting |
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Measurement and Control Equipment |
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Offshore Flaring |
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Refineries (flaring) |
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Regeneration of Activated Carbon |
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Sewage Sludge Disposal |
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10 Agriculture Forestry & Land Use Change |
Agricultural Soils |
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Agricultural Pesticides |
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Agricultural Livestock |
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Field Burning |
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11 Nature |
Forests |
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Natural Fires |
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