Appendices to ACRP Report 11: Guidebook on Preparing Airport GHG Emissions Inventories (2008) / Chapter Skim
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Pages 58-76
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From page 58... ...
ACRP Project 02-06 Appendices – Final September 19, 2008 Appendix E: Inventory Development Protocols E.1 Introduction This appendix provides background information on the protocol components used in developing the airport GHG emission inventories. The focus is on addressing the inventory development approaches minus the emissions and CO2 equivalency calculations which are covered in Appendices C and D
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ACRP Project 02-06 Appendices – Final September 19, 2008 E.2.2 Identification of Sources and Pollutant Source identification. Based on the purpose of the inventory, all applicable sources should be identified even if only a few will be included in the inventory.
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ACRP Project 02-06 Appendices – Final September 19, 2008 E.2.4 Geographic Boundaries LTO versus full flight. Unlike inventories for criteria pollutants, GHGs cannot be limited to just the LTO modes of flight.
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ACRP Project 02-06 Appendices – Final September 19, 2008 dispensed data, the question of where the fuel was used (or resold if not loaded on an aircraft) will be relevant while performance models will require a more accurate estimate of the total aircraft weight.
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ACRP Project 02-06 Appendices – Final September 19, 2008 These categories coincide with the organization of the guideline volumes. Although all of these volumes could be applicable to airports, the most pertinent is Energy.
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ACRP Project 02-06 Appendices – Final September 19, 2008 2 Assumes airport operations data is known. To separate LTO and cruise emissions, start with the same assessment for total emissions from Tier 1.
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ACRP Project 02-06 Appendices – Final September 19, 2008 If no prior inventories exist or are incomplete, then qualitative measures can be used to identify key categories and to augment the quantitative approaches. Qualitative measures would be appropriate for: • sources that have experienced emissions reductions (to reflect mitigation measures)
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ACRP Project 02-06 Appendices – Final September 19, 2008 WRI's corporate reporting guidance is intended to provide the protocols for setting up GHG inventories. This includes addressing issues of organizational and operational boundaries regarding the influence over sources.
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ACRP Project 02-06 Appendices – Final September 19, 2008 inventory development. For the 1990-2006 inventories, USEPA largely used the 1996 IPCC guidelines and have begun to employ some of the methods and data in the 2006 guidelines.
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ACRP Project 02-06 Appendices – Final September 19, 2008 • Geopolitical Bound – The Community Analysis: "The community-scale emissions analysis must include all greenhouse gas emissions associated with activity occurring within the local government's geopolitical boundary. Activities that occur within the community boundary can be controlled or influenced by jurisdictional policies, educational programs and establishing a precedent.
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ACRP Project 02-06 Appendices – Final September 19, 2008 E.3.6 The Climate Registry (TCR) The Climate Registry (TCR)
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ACRP Project 02-06 Appendices – Final September 19, 2008 E.4 Framework for Developing an Airport GHG Emissions Inventory Based on reviewing each of the GHG inventory protocols in the previous sections, it should be clear that guidance for developing airport inventories should be mainly focused on protocols from IPCC, WRI, and TCR. These protocols appear to the ones that most other organizations' protocols adhere to or borrow from.
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ACRP Project 02-06 Appendices – Final September 19, 2008 In keeping with the WRI principles of "sufficiently disaggregated" emissions, the individual component sources within these general categories should be maintained to facilitate categorizations by organizational and operational boundaries as necessary. For corporate-type reporting, the general airport sources could be equated to TCR's broad categories as indicated in Table E-5.
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ACRP Project 02-06 Appendices – Final September 19, 2008 approach or purpose of the inventory. In keeping with this protocol, all airport inventories should have sources categorized by the owning/controlling entity (e.g., airport, airlines, etc.)
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ACRP Project 02-06 Appendices – Final September 19, 2008 Support Equipment maintenance, snow removal, fire fighting, etc.) GSE, maintenance vehicles, etc.)
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ACRP Project 02-06 Appendices – Final September 19, 2008 Since GHGs have no local air quality effects, the emissions from GAVs would need to be tracked back to the farthest point of influence. That is, rather than cutting these emissions based on inlet/outlet roads to the airport, they need to be tracked back to the origin of travel to the airport (e.g., passenger homes)
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ACRP Project 02-06 Appendices – Final September 19, 2008 departure flight emissions attributed to an airport could be different than the total emissions derived from summing half the emissions from arriving flights and half the emissions from departure flights. These issues need to be carefully considered especially as policies are made regarding attribution of GHG emissions to airports.
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ACRP Project 02-06 Appendices – Final September 19, 2008 Country A Country B Airport 1 Airport 2 Airport 3 Flight 4 Flight 1 Flight 2 Flight 3 Protocol The Climate Registry (Assume Country B is outside of North America) IPCC Airport Inventory Country A and Airport A Related Inventory Flight 1 = Country A National Flight 2 = Worldwide Flight 3 = Worldwide Flight 4 = Worldwide Flight 1 = Country A Domestic Flight 2 = Country A International Flight 3 = Not included as part of Country A Flight 4 = Not included as part of Country A Flight 1 = Airport 1 Inventory Flight 2 = Airport 1 Inventory Flight 3 = Not included as part of Airport 1 Inventory Flight 4 = Not included as part of Airport 1 Inventory Figure E-4.
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From page 76... ...
ACRP Project 02-06 Appendices – Final September 19, 2008 76 In addition to the 95% criteria, IPCC also recommends the additional use of the 90% uncertainty criteria. As resources allow, this technique is intended to help refine the key source identification process by adding additional details.
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