| 1. |
- Adolfsson, Rolf
(författare)
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A review of Swedish crop residue statistics used in the greenhouse gas inventory
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Factors for recalculating primary crops into the nitrogen content of crop residues for different arable crops are compiled and summarised here. The data is included in the calculation of nitrous oxide from the turnover in crop residues and was used in the inventory of greenhouse gases in the 2006 Submission. The data is compared to data for both Denmark and Finland. In addition, sources of uncertainty are discussed. The suggested revision decreases the estimated emissions from crop residues by 18 % in 2003. The emissions from crop residues correspond to 6 % of the N2O emissions from agriculture in this year.
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| 2. |
- Adolfsson,, Rolf
(författare)
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A review of Swedish crop residue statistics used in the greenhouse gas inventory
- 2005
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The IPCC (Intergovernmental Panel on Climate Change) calculation model for nitrous oxide (N2O) emissions from agricultural land includes emissions from the nitrogen turnover in crop residues. The nitrogen content of crop residues is calculated using primary crop statistics in combination with recalculation factors, that is, the ratios of crop residue/primary crop and the nitrogen content in crop residues. In addition, information on removed crop residues is used to subtract that part of the crop residues that is not turned over on agricultural land.A comparison between data used in different countries reveals great differences.1 Variations in climate, soil fertility and production methods across different countries partly explain some of the differences. Nevertheless, it is likely that these differences also depend on different definitions as well as on variations in the trial data. A more systematic comparison of the recalculations for different countries requires well-documented sources of information
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| 3. |
- Adolfsson, Rolf
(författare)
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Documentation of data on landfills
- 2004
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In this report some vital data on landfills, used in Sweden’s greenhouse gas inventory to the UNFCCC, are controlled according to current guidelines. Quality aspects of historic surveys on deposited wastes are considered and compared over time. Plant specific data on recovered methane gas from landfills have been scanned into a database, which has been used as a tool for quality control.Despite of some minor differences, the historic quantities of deposited wastes seem to be consistently estimated. There seem to be no systematic differences between the surveys with data on deposited waste amounts, but the variability in the earliest surveys is probably greater.Data on recovered methane are accurate in general, since they mainly depend on sold energy; information that is well documented at the plants. Some unexplained deviations are however identified, when comparing the plant specific values over time. In some cases, it may be possible to increase the quality of the data by renewed contacts with the respondents. Much data were however collected some years back in time, which probably will make a systematic revision of the data unrealistic. A revision of a few values would probably only have minor impacts on the total amount of recovered methane. In the future, the quality of data input could be improved, by immediate consistency checks with older data. The collected data could be stored in a waste database, such as DIA (a database created within the project Data om hushållsavfall), to simplify this procedure.
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| 4. |
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| 5. |
- Wikström, Helene, et al.
(författare)
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Field Burning of Crop Residues
- 2004
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Emissions of greenhouse gases from field burning of crop residues have been estimated to very low levels in 2002. The emissions of CO and NOx may however be considered as not negligible. Information provided by experts support a decreasing trend of field burning as an agricultural practice, but there are only usable activity data for one single year (1997).Due to lack of activity data from beginning of the nineties and very low emission levels, the study concludes that Sweden should report trace gas emissions from field burning of crop residues as not occurring "NO" in the emission inventories.
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