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general:recalculations:start [2025/04/01 12:49] – [Reasons overview] kotzullageneral:recalculations:start [2025/04/04 14:03] (current) – [Possible reasons for Recalculations] zheng
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   * **new** (sub-)**categories** to be included in the inventory or re-allocation of existing sub-categories within the inventory   * **new** (sub-)**categories** to be included in the inventory or re-allocation of existing sub-categories within the inventory
   * **data** (activity data & emission factors) for certain (sub-)categories **available for the first time**   * **data** (activity data & emission factors) for certain (sub-)categories **available for the first time**
-  * **change of data sources** (for activity data)+  * **change of data sources** (for activity data and emissions)
   * use of **new emission factors** (due to: inquest, research projects, expert judgement etc.)    * use of **new emission factors** (due to: inquest, research projects, expert judgement etc.) 
   *  **improvement of methods** used for calculating emissions   *  **improvement of methods** used for calculating emissions
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 ===== Overview of reasons for recalculations against Submission 2024 ===== ===== Overview of reasons for recalculations against Submission 2024 =====
 +(main changes only, without claim to completeness)
  
 **1. revision of (primary) activity data** **1. revision of (primary) activity data**
   * 1.A together with 2.C.1: __finalisation of National Energy Balance__ 2022 [(AGEB2024)]   * 1.A together with 2.C.1: __finalisation of National Energy Balance__ 2022 [(AGEB2024)]
   * 2.A.2 and 2.A.3: small updates of statistical data for most recent years   * 2.A.2 and 2.A.3: small updates of statistical data for most recent years
 +  * 3.B.4.e: Horse numbers were corrected in all years and all districts by a factor of 2.75 to include horses which are kept outside of agricultural holdings and not counted by agricultural census
  
  
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 **3. newly implemented acitivity and/or emission factors** **3. newly implemented acitivity and/or emission factors**
-  * +  * 3.D.a.1: NH3 emission factors for mineral fertilizers in EMEP (2023) were used for the first time in the present submission.  
 +  * 3.D.a.4: NH3 emissions from crop residues are calculated for the first time according to the tier 2 method from EMEP (2023).  Cover crops are also a newly reported source of PM emissions from soils.  
 +  
  
 **4. revision of emission factors** **4. revision of emission factors**
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   * 1.A.3.b i, ii, iv, vi, vii, and 1.A.3.d.i (i): correction of rounding errors in emission factors for B[a]P, B[b]F, B[k]F, I[x]P, and PAH1-4   * 1.A.3.b i, ii, iv, vi, vii, and 1.A.3.d.i (i): correction of rounding errors in emission factors for B[a]P, B[b]F, B[k]F, I[x]P, and PAH1-4
   * 1.A.3.c - abrasive particulate matter: consideration of new (and far lower) emission factors for PM<sub>10</sub> from the abrasion of wheel on rail from a corresponding measurement campaign as part of a research project [(DZSF2025)]   * 1.A.3.c - abrasive particulate matter: consideration of new (and far lower) emission factors for PM<sub>10</sub> from the abrasion of wheel on rail from a corresponding measurement campaign as part of a research project [(DZSF2025)]
 +  * 3.B: improved emission factors for cattle and pig housing were introduced based on national research projects
 +  * 3.B: N2O emission factors were adopted from the IPCC Refinement (2019). The N2O EF for solid manure storage doubles, which then also applies to the corresponding NOx and N2 EFs.
 +
  
 **5. re-allocation of activity data and/or emissions** **5. re-allocation of activity data and/or emissions**