Table of Contents

Chapter 8.1 - Recalculations

Generally, improvement of the emission inventory is an ongoing task and triggers recalculations for all source categories and pollutants frequently.

Further information regarding recalculations (especially due to changes in methods or activity data) can be found in the corresponding chapter of the National Inventory Report.

Possible reasons for Recalculations

Due to the ever ongoing efforts to improve the inventory, more or less broad recalculations become necessary with each new submission.

Possible reasons for recalculations are

All these changes can effect specific years of the inventory as well the entire time series, leading to more or less significant changes within the emission trends.

Declaration of Recalculations

Under UN FCCC reporting, parties have to comment any recalculations in any year leading to differences between latest and current submission for a given year or the time period or series. Thereby, highest attention is given to recalculations within base year and the most current year of the latest submission:

Recalculations in Base Year data

Recalculations in data of current year of the latest submission

Under UN ECE, within the IIR, Germany focusses on recalculations in values reported for 1990 for all MAIN POLLUTANTS, HEAVY METALS and POPS, 1995 for PM2.5 and PM10 and 2000 for BLACK CARBON (BC), and the last year of the previous submission, providing the quantity (in absolute numbers and in %) of change for any recalculated emission and the reasons for the recalculations carried out

Recalculations in current submission

Table 1: Overview of impact of recalculations on the level of National Totals (For more detailed information please mouseclick the pollutant.)

for reporting year: Base Year1 Change 2018 Change
in NFR submission: 2020 2021 absolute relative 2020 2021 absolute relative
Main pollutants
NEC
Nitrogen Oxides - NOx (as NO2) [kt] 2.884,38 2.850,05 -34,33 -1,19% 1.202,28 1.210,50 8,22 0,68%
Non-Methane VOC - NMVOC [kt] 4.033,30 3.890,85 -142,45 -3,53% 1.140,32 1.125,02 -15,31 -1,34%
Sulphur Oxides - SOx (as SO2) [kt] 5.472,91 5.474,42 1,51 0,03% 288,97 291,78 2,81 0,97%
Ammonia - NH3 [kt] 760,05 715,09 -44,97 -5,92% 636,43 601,24 -35,18 -5,53%
Particulate Matter
Particles <2.5µm - PM2.5 [kt] 212,77 205,65 -7,13 -3,35% 96,71 94,66 -2,05 -2,11%
Particles <10µm - PM10 [kt] 355,89 346,18 -9,71 -2,73% 210,81 207,01 -3,80 -1,80%
Total Suspended Particles - TSP [kt] 2.056,96 2.050,52 -6,44 -0,31% 387,72 383,53 -4,18 -1,08%
Black Carbon - BC [kt] 39,76 39,08 -0,67 -1,70% 12,55 12,47 -0,08 -0,62%
Other
Carbon Monoxide - CO [kt] 13.716,30 13.171,06 -545,24 -3,98% 2.937,91 2.957,80 19,89 0,68%
Heavy Metals
Priority HM
Lead - Pb [t] 1.919,41 1.900,35 -19,07 -0,99% 207,36 162,18 -45,18 -21,79%
Cadmium - Cd [t] 30,42 29,10 -1,31 -4,32% 12,69 11,94 -0,75 -5,88%
Mercury - Hg [t] 35,45 35,47 0,02 0,06% 8,25 8,30 0,05 0,58%
Other HM
Arsenic - As [t] 86,90 85,85 -1,05 -1,20% 8,75 6,07 -2,67 -30,58%
Chrome - Cr [t] 166,13 165,81 -0,32 -0,19% 76,18 75,26 -0,92 -1,20%
Copper - Cu [t] 632,76 620,19 -12,56 -1,99% 606,15 585,42 -20,73 -3,42%
Nickel - Ni [t] 340,76 339,57 -1,19 -0,35% 155,32 146,73 -8,59 -5,53%
Selenium - Se [t] 5,66 5,66 0,00 -0,01% 7,21 7,20 -0,01 -0,15%
Zinc - Zn [t] 475,38 474,59 -0,79 -0,17% 292,95 292,77 -0,18 -0,06%
Persistent Organic Pollutants - POPs
Dioxines & Furanes - PCDD/F [g] 814,98 814,95 -0,02 -0,003% 120,73 119,80 -0,93 -0,77%
Polycyclic Organic Hydrocarbons - PAHs
Benzo(a)pyrene - B[a]P [t] 139,27 27,94 -111,33 -80% 28,21 15,84 -12,38 -44%
Benzo(b)fluoranthene - B[b]F [t] 3,85 35,30 31,45 817% 1,85 22,96 21,11 1,142%
Benzo(k)fluoranthene - B[k]F [t] 2,09 16,01 13,91 665% 1,18 10,51 9,32 788%
Indeno(1,2,3-c,d)pyrene - I[1,2,3-c,d]P [t] 1,49 22,84 21,35 1,434% 0,85 15,18 14,34 1,696%
Polycyclic Aromatic Hydrocarbons - PAH 1-4 [t] 374,98 177,42 -197,55 -53% 174,88 75,71 -99,18 -57%
Other POPs
Hexachlorobenzene - HCB [kg] 2.897,49 2.898,38 0,90 0,03% 11,89 12,82 0,93 7,83%
Polychlorinated Biphenyls - PCBs [kg] 1.735,48 1.735,48 0,00 0,00% 212,85 219,33 6,47 3,04%

1: Base Year of reporting: 1990; excumptions: PM2.5 and PM10: 1995 and BC: 2000

Reasons overview

1. revision of activity data

2. update or revision of entire model

3. newly implemented emission factors

4. revision of emission factors

5. re-allocation of activity data and emissions

6. as an outcome of the ongoing review activities under both UNFCCC and UNECE