Before the 1997 Kyoto Protocol on Climate Protection, the fluorinated greenhouse gases HFCs, PFCs, and SF6 (F-gases) aroused little public attention. Since then, the standards on surveying and reporting on national emissions have been rising constantly. Amongst others, the annual reporting to the UNFCCC secretariat makes detailed declarations on use and emissions of F-gases necessary, which have to be filled in specified formats for submission (Common Reporting Format = CRF). The scientific basis has been set out by the UNFCCC guidelines on reporting, in accordance with the instructions laid down in IPCC good practice guidance.
Additionally, in Germany the Centralised System of Emissions (ZSE) shall provide a suitable tool to satisfy the quality needs of both activity data and emission factors. From 1995 onwards, activity data and emissions of each individual application sector shall be presented in a comprehensible and transparent way. Therefore, the way of data collection as well as the estimation methods applied must be well documented. Moreover, data has to be prepared for appropriate importation into ZSE.
It is the objective of this study to provide the transparency demanded within 40 national application sectors of F-gases, for the period between 1995 and 2002.
Firstly, all activity data as well as the emissions related to them are presented and commented. This applies to manufacturing of products, F-gases banked in operating systems, anddecommissioning.
Secondly, the methodologies applied to calculate the emissions are described and all sources of information are revealed, e.g. literature, experts from the manufacturing industry, users, trade, and academia.
Thirdly, reliability and safety of data are discussed.
Fourthly, possible deviations from the IPCC default values are stated and reasons are given for that.
Wherever this intensive reviewing of 40 sectors through eight years of reporting uncovers gaps or inconsistencies in previous reports, later corrections can be made by means of recalculations. By that, the study contributes to a higher quality level of data reporting for the past as well as for the future.
Recommendation how to use this study: Each of the 40 chapters (F-Gas-Sheets) can fairly be read and understood independently. Nevertheless, the introductory remark on the eight different emission types occurring in the study together with the graphical illustration (incl. the list of abbreviations) might make reading easier.
The sequence of the sectors in this study follows the order of sectors in the CRF data-sheet, although it is not identical to it.