Structure Of The Guidelines

The structure of the 2006IPCC Guidelines improves upon the structure of the 1996IPCC Guidelines, GPG2000 and GPG-LULUCF in two respects.

Firstly, whereas a user of the 1996IPCC Guidelines, GPG2000 and GPG-LULUCF may need to cross reference between four or five volumes13 to make an emission or removal estimate, the 2006 IPCC Guidelines may require cross referencing between two volumes: Volume 1 (General Guidance and Reporting), and the relevant sectoral volume (one of Volume 2 (Energy), Volume 3 (Industrial Processes and Product Use), Volume 4 (Agriculture, Forestry and Other Land Use), and Volume 5 (Waste)). This represents a considerable simplification.

Secondly, the 2006 IPCC Guidelines present Agriculture, Forestry and Other Land Use in a single volume, rather than two volumes comprising Agriculture, on the one hand, and Land-use Change and Forestry on the other. This allows for better integration of information on the pattern of land use and should facilitate more consistent use of activity data (for example, fertilizer application), that affects both agriculture and other land uses, thus reducing or avoiding the possibilities for double counting or omission.

13 That is, three volumes of the IPCC 1996 Guidelines plus at least one of GPG2000 or GPG-LULUCF.

The 2006 IPCC Guidelines retain the standardised layout of methodological advice at the category level that was introduced in GPG2000 and was maintained in GPG-LULUCF. Table 4 shows the general structure used for each category. Any user familiar with GPG2000 and GPG-LULUCF should be able to shift to the 2006 IPCC Guidelines without difficulty.

Table 4

General structure of sectoral guidance chapters

• Methodological Issues o Choice of Method, including decision trees and definition of tiers.

o Choice of Emission Factor o Choice of Activity Data o Completeness

_o Developing a Consistent Time Series_

• Uncertainty Assessment o Emission Factor Uncertainties _o Activity Data Uncertainties_

• Quality Assurance/Quality Control, Reporting and Documentation

• Worksheets

The previous IPCC inventory guidance has been reviewed and, where needed, clarified and expanded to improve its user friendliness. Across all the volumes, some additional categories have been identified and included. The guidance focuses on inventory methodologies rather than on scientific discussions of the background material, for which references are provided.

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