Energy Use Data Handbook, 1990 and 1998 to 2004

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Appendix B – Reconciliation of Definitions

Reconciliation of Definitions for Estimated Greenhouse Gas Emissions Found in This Handbook With Environment Canada's Canada's Greenhouse Gas Inventory 1990-2003¹

Introduction

In this handbook, Energy Use Data Handbook 1990 and 1998 to 2004 (EUDH), the data on greenhouse gas (GHG) emissions are estimated using emissions factors developed by Environment Canada (EC). The emissions estimates provided here mirror the sectoral definitions used to calculate the estimates presented in EC's Canada's Greenhouse Gas Inventory 1990–2003 (CGGI-2003). Both Natural Resources Canada (NRCan) and EC use the energy demand data from Statistics Canada's Report on Energy Supply-Demand in Canada as a base. However, the two organizations use different sectoral mappings. EC prepares its emissions inventory according to the specifications of the Intergovernmental Panel on Climate Change, while NRCan has developed mapping that is more suited to energy end-use analysis.

The objective of this appendix is to help readers understand the similarities and differences between EUDH and CGGI-2003 emissions estimates for the five sectors covered in this handbook.

Residential Sector

EUDH and CGGI-2003 differ in their definitions of residential emissions.

• EUDH residential emissions include end-use electricity-related emissions, which are reported under power generation in CGGI-2003.
  
  
• Wood energy use differs (EC's estimate is larger than NRCan's). Hence, the GHG emissions related to wood energy use presented here are lower than those in CGGI-2003.

Commercial/Institutional Sector

There is only one difference between EUDH and CGGI-2003 definitions of commercial/institutional emissions.

• EUDH commercial/institutional emissions include end-use electricity-related emissions, which CGGI-2003 includes under power generation.

Industrial Sector

There are many differences between EUDH and CGGI-2003 definitions of the industrial sector.

• CGGI-2003 re-allocates industrial diesel fuel use from the industrial sector to the transportation sector.
  
  
• This handbook re-allocates producers' consumption of petroleum products from the producers' consumption category to the petroleum refining and upstream mining industries. CGGI-2003 reports this as consumption of fossil fuels.
  
  
• CGGI-2003 re-allocates industrial coke use from energy use in the industrial sector to non-energy use in industrial processes.
  
  
• EUDH industrial emissions include end-use electricity-related emissions. CGGI-2003 reports them under power generation.
  
  
• CGGI-2003 includes producers' consumption of non-fossil fuels in the fossil fuel categories. EUDH does not report this consumption.
  
  
• CGGI-2003 also re-allocates estimates of emissions from upstream oil and gas flaring to fugitive emissions from the fossil fuel sector.

Transportation Sector

EUDH and CGGI-2003 differ in their definitions of transportation emissions.

• CGGI-2003 re-allocates industrial and agriculture diesel and agriculture motor gasoline to the transportation sector.
  
  
• CGGI-2003 includes pipeline-related emissions in the transportation sector.
  
  
• CGGI-2003 excludes emissions resulting from the use of energy in the foreign aviation and marine sub-sectors.
  
  
• EUDH transportation emissions include end-use electricity-related emissions, which are reported under power generation in CGGI-2003.

Electricity Generation Sector

There is only one difference between EUDH and CGGI-2003 for the electricity generation sector.

• CGGI-2003 reports emissions from electricity and steam generation at the aggregate level, while EUDH reports emissions for electricity generation only. Note that in its Annex 9 "Electricity Intensity Tables," CGGI-2003 reports detailed emissions from electricity generation that are similar to those found in this handbook.

¹ Canada's official GHG inventory is available on the Environment Canada Web site at www.ec.gc.ca/pdb/ghg/inventory_e.cfm.

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