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sector:agriculture:manure_management:start [2022/12/14 15:43] – [Table] doering | sector:agriculture:manure_management:start [2022/12/15 12:12] – [Method] doering | ||
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===== NMVOC ===== | ===== NMVOC ===== | ||
- | In 2020, NMVOC emissions from manure management amount to 289.8 which is 96.9 % of total NMVOC emissions from the agricultural sector. 84.7 % originate from cattle, 4.8 % from pigs, and 9.4 % from poultry. | + | In 2021, NMVOC emissions from manure management amount to 281.2 kt which is 96.8 % of total NMVOC emissions from the agricultural sector. 84.6 % originate from cattle, 4.5 % from pigs, and 9.7 % from poultry. |
==== Method ==== | ==== Method ==== | ||
- | The Tier 2 methodology provided by EMEP (2019)-3B-28 was used to assess the NMVOC emissions from manure management for dairy cattle and other cattle. For all other animals the Tier 1 methodology (EMEP (2019)-3B-17) was used. | + | The Tier 2 methodology provided by EMEP (2019)-3B-28 was used to assess the NMVOC emissions from manure management for dairy cattle and other cattle. For all other animals the Tier 1 methodology (EMEP (2019)-3B-17) was used. The use of the Tier 2 methodology deliversyields NMVOC emissions which formally could be reported in the sectors 3.D.a.2.a (application of manure to soils) and 3.D.a.3 (grazing emissions). However, to be congruent with the NMVOC emissions for other animal categories, Germany reports these emissions in the NMVOC emissions reported from manure management (3.B). For the NFR codes 3.D.a.2.a |
=== Activity data === | === Activity data === | ||
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=== Emission factors === | === Emission factors === | ||
For the Tier 2 methodology applied to dairy cattle and other cattle the following data was used: | For the Tier 2 methodology applied to dairy cattle and other cattle the following data was used: | ||
- | * gross feed intake in MJ per year, country specific data from the annual reporting of greenhouse gas emissions, see NIR 2022, Chapter 5.1.3.3, | + | * gross feed intake in MJ per year, country specific data from the annual reporting of greenhouse gas emissions, see NIR 2023, Chapter 5.1.3.3, |
- | * proportion x< | + | * proportion x< |
* FRAC< | * FRAC< | ||
* FRAC< | * FRAC< | ||
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* EF< | * EF< | ||
- | For all other animal categories the Tier 1 emission factors for NMVOC were used as provided in EMEP (2019)-3B-18, | + | For all other animal categories the Tier 1 emission factors for NMVOC were used as provided in EMEP (2019)-3B-18, |
The implied emission factors given in Table 4 relate the overall NMVOC emissions to the number of animals in each animal category. The IEFs for dairy cattle and other cattle are much higher than the EMEP Tier 1 EF, which are 17.937 kg NMVOC for dairy cattle and 8.902 kg NMVOC for other cattle. The only possible explanation for those huge differences is that the EMEP Tier 2 and Tier 1 methods are not consistent. | The implied emission factors given in Table 4 relate the overall NMVOC emissions to the number of animals in each animal category. The IEFs for dairy cattle and other cattle are much higher than the EMEP Tier 1 EF, which are 17.937 kg NMVOC for dairy cattle and 8.902 kg NMVOC for other cattle. The only possible explanation for those huge differences is that the EMEP Tier 2 and Tier 1 methods are not consistent. | ||
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=== Trend discussion for Key Sources === | === Trend discussion for Key Sources === | ||
- | Dairy cattle and other cattle are key sources of NMVOC emissions from manure management. The total NMVOC emissions from both animal categories strongly correlate with the animal numbers given in Table 1 (dairy cattle: R² = 0.887; other cattle: R² = 0.998). | + | Dairy cattle and other cattle are key sources of NMVOC emissions from manure management. The total NMVOC emissions from both animal categories strongly correlate with the animal numbers given in Table 1 (dairy cattle: R² = 0.867; other cattle: R² = 0.993). |
=== Recalculations === | === Recalculations === | ||
- | All time series of the emission inventory have completely been recalculated since 1990. Table REC-3 compares the recalculated time series of the NMVOC emissions from 3.B with the respective data of last year’s submission. The recalculated total emissions are slightly lower in some years and skightly higher in other years. This is due to improved methodology for the suckler cows (**recalculation reason | + | All time series of the emission inventory have completely been recalculated since 1990. Table REC-3 compares the recalculated time series of the NMVOC emissions from 3.B with the respective data of last year’s submission. The recalculated total emissions are slightly lower for dairy cattle |
+ | For other animals there are no differences. Further details on recalculations are described in Rösemann | ||