= Intermediate conclusions =
[[PageOutline]]

== Pre industrial run ==
Some miscellaneous characteristics:
 - GES configuration,
 - 39 vertical layers, resolution 144x142,
 - from fictives years 1970 to 2015,
 - no anthropogenic emissions,
 - BBG emissions stayed at 1850 (as well as aircraft).


**__ Quantities to remember: __**
* Total N,,2,,O loss: 10.73 TgN/y
* Total N,,2,,O emissions: 10.73 TgN/y
* Burden : 1368 TgN

[[Image(wiki:ESM2025-N-cycle:ev_pi_loss.png, 500px)]]
[[Image(wiki:ESM2025-N-cycle:ev_pi_vmr.png, 500px)]]


== CEDS emissions for N,,2,,O (and NH,,3,,) ==
[[Image(wiki:ESM2025-N-cycle:N2O_CEDS_supplementary_avion.png, 700px)]]
[[Image(wiki:ESM2025-N-cycle:NH3_CEDS_supplementary.png, 700px)]]

List of categories and subcategories:
  * Agriculture:  ['3B_Manure-management', '3D_Soil-emissions']
  * Energy: ['1A1a_Electricity-autoproducer', '1A1a_Electricity-public', '1A1a_Heat-production', '1A1bc_Other-transformation','1B1_Fugitive-solid-fuels', '1B2_Fugitive-petr', '7A_Fossil-fuel-fires']
  * Industrial: ['1A2a_Ind-Comb-Iron-steel', '1A2b_Ind-Comb-Non-ferrous-metals', '1A2c_Ind-Comb-Chemicals', '1A2d_Ind-Comb-Pulp-paper', '1A2e_Ind-Comb-Food-tobacco', '1A2f_Ind-Comb-Non-metalic-minerals', '1A2g_Ind-Comb-Construction', '1A2g_Ind-Comb-machinery','1A2g_Ind-Comb-mining-quarying', '1A2g_Ind-Comb-other','1A2g_Ind-Comb-textile-leather', '1A2g_Ind-Comb-transpequip','1A2g_Ind-Comb-wood-products','1A5_Other-unspecified', '2A1_Cement-production', '2B_Chemical-industry', '7BC_Indirect-N2O-non-agricultural-N',  '2B2_Chemicals-Nitric-acid', '2B3_Chemicals-Adipic-acid']
  * Transportation: ['1A3b_Road', '1A3c_Rail','1A3dii_Domestic-navigation', '1A3eii_Other-transp']
  * Residential, Commercial, Other: ['1A4a_Commercial-institutional', '1A4b_Residential', '1A4c_Agriculture-forestry-fishing']
  * Solvents production and application: [ '2D_Other-product-use' ]
  * Waste: ['5C_Waste-combustion', '5D_Wastewater-handling', '5E_Other-waste-handling']
  * Int. Aviation / Shipping ['1A3di_International-shipping', '1A3ai_International-aviation', '1A3aii_Domestic-aviation']
NB: It exists also some other subcategories but, there are zero N,,2,,O emission.

[[Image(wiki:ESM2025-N-cycle/Intermediate_conclusions:CEDS_emissions.png, 500px)]]

== EDGAR emissions ==
List of categories and subcategories:
  * AFOLU    :  ['Biomass burning (CH4, N2O)', 'Managed soils and pasture (CO2, N2O)', 'Manure management (N2O, CH4)', 'Synthetic fertilizer application (N2O)'] 
  * Buildings    :  ['Residential', 'Non-residential'] 
  * Energy systems    :  ['Electricity & heat', 'Other (energy systems)', 'Oil and gas fugitive emissions', 'Petroleum refining'] 
  * Industry    :  ['Chemicals', 'Other (industry)', 'Waste', 'Metals'] 
  * Transport    :  ['Domestic Aviation', 'Other (transport)', 'Road', 'Inland Shipping', 'International Aviation', 'Rail ', 'International Shipping'] 

[[Image(wiki:ESM2025-N-cycle/Intermediate_conclusions:EDGAR_emissions.png, 500px)]]

== Exploration of inventories ==
* //Bouwman Inventory// :
  1. 846 N,,2,,O emission measurements in agricultural fields and 99 measurements for NO emissions
  2. The data set includes literature reference; location of the Measurement; climate; soil type, texture, organic C content, N content, drainage, and pH; residues left in the field; crop; fertilizer type; N application rate; method and timing of fertilizer application; NH,,4,,+ application rate (for organic fertilizers), N,,2,,O/NO emission/denitrification (expressed as total over the measurement period, as % of N rate, and as % of N rate accounting for control); measurement technique; length of measurement period; frequency of the measurements; and additional information, such as year/season of measurement, information on soil, crop or fertilizer management, specific characteristics of the fertilizer used, and specific weather events important for explaining the measured emissions.
  3. global gridded (1°x1° resolution) data bases of soil type, soil texture, NDVI (vegetation indices) and climate.
  4. global emission thus calculated is 6.8 Tg N,,2,,O-N y-1. The tropics (± 30° of the equator) contribute 5.4 Tg N,,2,,O-N y-1 and the emission from extra-tropical regions (poleward of 30°) is 1.4 Tg N,,2,,O-N y-1 .


* //Transcom Inventory// :
  1. "Emissions from natural soils (6–7 TgN yr −1 ) account for 60–70 % of global N2O emissions (Syakila and Kroeze, 2011; Zaehle et al., 2011). The remaining 30–40 % of emissions is from oceans (4.5 TgN yr −1 )"
  2. Five different inversion frameworks (chemistry transport model) : MOZART4 (2.5° × 1.88°), ACMt42167 (2.8° × 2.8°), TM3 (5.0° × 3.75°), TM5 (6.0° × 4.0°), LMDZ4 (3.75° × 2.5°).
  3. Data set from Orchidee O-CN, Pisces, edgar-4.1, gfed-2 and from different category (terrestrial biosphere, ocean, waste water, solid waste, solvents, fuel prod, ground transport, industry combustion, residential and other combustion, shipping, biomass burning)

* Values of N,,2,,O emissions per inventory :

||  (MtN/yr) ||   Ocean  ||   Land   || Total ||  (MtN,,2,,O/yr) ||  Ocean  ||   Land   || Total ||
||**Bouwman**  || 3.595 || 7.531 || 11.126 || xxx || 5.650 || 11.835 || 17.485 ||
||**Transcom** || 4.222 || 10.573 || 14.795 || xxx || 6.634 || 16.614 || 23.248 ||
||**Piscidee** || 3.962 || 7.107 || 11.069 || xxx ||6.226 || 11.168 || 17.394 ||

* Comparison between Incasflx outputs and masks on NetCDF files:

||   ||||||     -   Output INCASFLX    -    ||||||  -   Notebook computing (FracMask) -  ||||||     -  Notebook computing (0/1 Mask)  -   ||
||   (MtN2O/yr)   ||   Ocean  ||   Land   || Ratio O/L ||   Ocean  ||   Land   || Ratio O/L ||  Ocean  ||   Land   || Ratio O/L ||
||**Bouwman**  ||  5.6505  ||  11.835  ||  0.478  ||  6.58   ||  10.945  ||  0.6012  ||  5.973  ||  11.552  ||  0.517    ||
||             ||   32.3%  ||   67.7%  ||         ||  37.6%  ||   62.4%  ||          ||  34.1%  ||   65.9%  ||           ||
||**Transcom** ||   6.634  ||  16.614  ||  0.399  ||  8.879  ||  14.421  ||  0.616   ||  8.118  ||  15.184  ||   0.535   ||
||             ||   28.5%  ||   71.5%  ||         ||  38.1%  ||   61.9%  ||          ||  34.8%  ||   65.2%  ||           ||
||**Piscidee** ||   6.226  ||  11.168  ||  0.557  ||  6.651  ||  10.782  ||  0.617   ||  6.095  ||  11.339  ||   0.538   ||
||             ||   35.8%  ||   64.2%  ||         ||  38.2%  ||   61.8%  ||          ||  34.9%  ||   65.1%  ||           ||


__General remarks__: Variable for Bouwman = fn2o_oce & fn2o_soil. Land emissions > Ocean emissions. Ocean emissions ~ 6 Mt/yr. Land emissions -> differences because of different period (pre-industrial & nowadays). Per line, Ocean+Land are equal independently of the calculation made.