meta data for this page
  •  

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
sector:other_and_natural_sources:other_sources [2022/10/10 14:00] – ↷ Page name changed from sector:other_and_natural_sources:start to sector:other_and_natural_sources:other_sources gniffkesector:other_and_natural_sources:other_sources [2025/03/17 21:17] (current) – vosen
Line 1: Line 1:
-====== Chapter 7 - NFR 6 - Other Sources & NFR 11 - Natural Sources ======+====== 6 - Other Sources ======
  
-===== NFR 6 - Other Sources ===== +Within **NFR 6 - Other Sources**, activities and resulting emissions are taken into account that cannot be related to any of the other NFR catgeories.
-=====6.A Human ammonia emissions from sweating and breathing ===== +
-====Short description ====+
  
-^  NFR-Code  ^  Name of category                                        ^  Method ^  AD  ^  EF  ^  Key Category  ^ +For the time being, the two activities or emission sources taken into account here are __human breathing (respiration) and sweating (transpiration)__ as well as __domestic animals (pets)__.
-|  6.A       | **Human ammonia emissions from sweating and breathing**  |      T1 |   NS | D    |                |+
  
  
-In addition to animal-related excretion, nitrogen (N) is also introduced into the environment through human consumption of food and later disposed of. Mainly nitrogen is released into the wastewater system in the form of urine, but physiological processes also release nitrogen as ammonia through sweating and respiration. This emission source describes ammonia emissions produced by humans through sweating and breathing.+^  NFR code  ^  NFR name                                                                                                                        ^ 
 +|  6.A.1       | [[sector:other_and_natural_sources:other_sources:human_sweating&breathing| Emissions from human re- and transpiration ]]  | 
 +|  6.A.2      | [[sector:other_and_natural_sources:other_sources:pets| Ammonia emissions from pets ]]                                      |
  
-====Methodology==== +----
-The calculation of ammonia emissions in this area is made for the first time and is based on the methodological description of Visschendijk et al. (2022) ((Visschedijk, A.J.H., J.A.J. Meesters, M.M. Nijkamp, W.W.R. Koch, B.I. Jansen & R. Dröge, 2022. Methods used for the Dutch Emission Inventory. Product usage by consumers, construction and services. RIVM Report 2022-0003. RIVM, Bilthoven., chapter 19 [https://rivm.openrepository.com/bitstream/handle/10029/625730/2022-0003.pdf?sequence=1&isAllowed=y])).+
  
-For the complete time series, the emissions are calculated as follows:  
-Emission = Activity data x Emission factor  
  
-Activity data = the number of German inhabitants +===== Overview =====
  
-Emission factor = kg emission per inhabitant +__Emission trends for main pollutants in //NFR 6 - Other Sources//:__ 
 +{{ :sector:iir_nfr6_2025.png?nolink&direct&700 |NFR 6 emission trends per category }}
  
-===Activity data === +__Contribution of NFRs 1 to 6 to the National Totals, for 2021__ 
-The number of inhabitants in Germany is derived from the German statistic Agency (DESTATIS) on an annual basis. The number of people living in Germany at the end of June in a specific year is taken as activity data for that year. As of September 30, 2021, 83,2 million people lived in Germany. The following table shows the population figures over time. +{{ :sector:mainpollutants_sharesnfrs_incl_transport_2025.png?direct&direct&700 | Percental contributions of NFRs 1 to 6 to the National Totals}}
- +
-Table 1: Population figures in Germany from 1990 onwards +
-^  Unit  ^  Population  ^ +
-|  1990  |   79,753,227 | +
-|  1991  |   79,973,409 | +
-|  1992  |   80,499,815 | +
-|  1993  |   80,946,478 | +
-|  1994  |   81,147,486 | +
-|  1995  |   81,307,715 | +
-|  1996  |   81,466,408 | +
-|  1997  |   81,509,902 | +
-|  1998  |   81,445,957 | +
-|  1999  |   81,422,405 | +
-|  2000  |   81,456,617 | +
-|  2001  |   81,517,272 | +
-|  2002  |   81,578,375 | +
-|  2003  |   81,548,709 | +
-|  2004  |   81,456,460 | +
-|  2005  |   81,336,663 | +
-|  2006  |   81,173,139 | +
-|  2007  |   80,992,305 | +
-|  2008  |   80,763,506 | +
-|  2009  |   80,482,557 | +
-|  2010  |   80,284,071 | +
-|  2011  |   80,274,983 | +
-|  2012  |   80,523,746 | +
-|  2013  |   80,767,463 | +
-|  2014  |   81,197,537 | +
-|  2015  |   82,175,684 | +
-|  2016  |   82,521,653 | +
-|  2017  |   82,792,351 | +
-|  2018  |   83,019,213 | +
-|  2019  |   83,166,711 | +
-|  2020  |   83,155,031 | +
-|  2021  |   83,237,124 | +
- +
-===Emission factor=== +
-For the calculation of ammonia emissions in this category, the highest of the emission factors given in Sutton et al. (2000)((Sutton, M.A., U. Dragosits, Y.S. Tang & D. Fowler, 2000. Ammonia emissions from non-agricultural sources in the UK. Atmospheric Environment 34 (2000), 855–869.)) are used, resulting in a total emission factor of 0.0826 kg NH<sub>3</sub>-N per person per year (according to the assumptions sum of 74.88 (sweating) and 7.7 (breathing) grams NH<sub>3</sub>-N per person per year, respectively). The higher EFs were used to avoid underestimating emissions. The amount was converted to the amount of ammonia using the stoichiometric factor (17/14). +
- +
-===Emission Trend=== +
-The average value of the last 10 years is 8.21 kt NH<sub>3</sub> emissions per year, so this category is not a major source of regional NH<sub>3</sub> emissions. The following figure shows the emission trend.  +
- +
-Figure 1: NFR 6.A, Ammonia emissions from human sweat & breath +
- +
-{{ :sector:natural_sources:6a_nh3_em_human_breath_and_sweating.png?nolink&600 |}} +
- +
- +
- +
-===Uncertainty and Quality checks=== +
-The AD from DESTATIS usually have an uncertainty of ± 3%. The uncertainties for the emission factors are estimated to be relatively high, as emission factors vary between different sources and the amount of ammonia volatilized is based on an assumption. Hence the overall uncertainty for the emission estimation of NH3 is qualified estimated by expert judgement to be ± 95%. +
- +
-===Quality checks=== +
-No sector-specific quality checks are done. +
- +
-===Further Improvement=== +
-Currently no improvements are planned. +
- +
- +
- +
- +
-===== NFR 11 - Natural Sources ===== +
- +
-^  NFR-Code                                        ^  Name of category      ^                                              Method ^  AD  ^  EF  ^  Key Category                              ^ +
-|  **11**                                          | **Natural Sources**    |  //see sub-categories//                                                                                     |||| +
-| //consisting of / including source categories//                                                                                                                                       |||||| +
-|  11.A                                            | Volcanoes              |  //not occurring in Germany//                                                                               |||| +
-|  11.B                                            | [[sector:other_and_natural_sources:forest_fires:start| Forest Fires]] |  CS, T2  |  CS  |  D   | //not included in key category analysis//  | +
-|  11.C                                            | Other Natural Sources  |  //no other natural sources reported for Germany//                                                          ||||+