| 1 | | = Intermediate Conclusions = |
| | 1 | == Pre industrial run == |
| | 2 | - 39 layers, |
| | 3 | - from fictives years 1970 to 2015 |
| | 4 | - |
| | 5 | |
| | 6 | * Total N,,2,,O loss: 10.73 TgN/y |
| | 7 | * Total N,,2,,O emissions: 10.74 TgN/y |
| | 8 | * Burden : 1368 TgN |
| | 9 | |
| | 10 | |
| | 11 | |
| | 12 | == CEDS emissions for N,,2,,O (and NH,,3,,) == |
| | 13 | [[Image(N2O_CEDS_supplementary_avion.png, 700px)]] |
| | 14 | [[Image(NH3_CEDS_supplementary.png, 700px)]] |
| | 15 | |
| | 16 | == Exploration of inventories == |
| | 17 | * //Bouwman Inventory// : |
| | 18 | 1. 846 N,,2,,O emission measurements in agricultural fields and 99 measurements for NO emissions |
| | 19 | 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. |
| | 20 | 3. global gridded (1°x1° resolution) data bases of soil type, soil texture, NDVI (vegetation indices) and climate. |
| | 21 | 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 . |
| | 22 | |
| | 23 | |
| | 24 | * //Transcom Inventory// : |
| | 25 | 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 )" |
| | 26 | 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°). |
| | 27 | 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) |
| | 28 | |
| | 29 | * Values of N,,2,,O emissions per inventory : |
| | 30 | |
| | 31 | || (MtN/yr) || Ocean || Land || Total || (MtN,,2,,O/yr) || Ocean || Land || Total || |
| | 32 | ||**Bouwman** || 3.595 || 7.531 || 11.126 || xxx || 5.650 || 11.835 || 17.485 || |
| | 33 | ||**Transcom** || 4.222 || 10.573 || 14.795 || xxx || 6.634 || 16.614 || 23.248 || |
| | 34 | ||**Piscidee** || 3.962 || 7.107 || 11.069 || xxx ||6.226 || 11.168 || 17.394 || |
| | 35 | |
| | 36 | * Comparison between Incasflx outputs and masks on NetCDF files: |
| | 37 | |
| | 38 | || |||||| - Output INCASFLX - |||||| - Notebook computing (FracMask) - |||||| - Notebook computing (0/1 Mask) - || |
| | 39 | || (MtN2O/yr) || Ocean || Land || Ratio O/L || Ocean || Land || Ratio O/L || Ocean || Land || Ratio O/L || |
| | 40 | ||**Bouwman** || 5.6505 || 11.835 || 0.478 || 6.58 || 10.945 || 0.6012 || 5.973 || 11.552 || 0.517 || |
| | 41 | || || 32.3% || 67.7% || || 37.6% || 62.4% || || 34.1% || 65.9% || || |
| | 42 | ||**Transcom** || 6.634 || 16.614 || 0.399 || 8.879 || 14.421 || 0.616 || 8.118 || 15.184 || 0.535 || |
| | 43 | || || 28.5% || 71.5% || || 38.1% || 61.9% || || 34.8% || 65.2% || || |
| | 44 | ||**Piscidee** || 6.226 || 11.168 || 0.557 || 6.651 || 10.782 || 0.617 || 6.095 || 11.339 || 0.538 || |
| | 45 | || || 35.8% || 64.2% || || 38.2% || 61.8% || || 34.9% || 65.1% || || |
| | 46 | |
| | 47 | |
| | 48 | __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. |
| | 49 | |
