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| sector:other_and_natural_sources:natural_sources [2023/03/03 09:12] – [Table] hausmann | sector:other_and_natural_sources:natural_sources [2023/04/13 07:22] – [Short description] kotzulla | ||
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| - | ====== NFR 11 - Other Sources ====== | + | ===== 11.C - Other Natural Sources ===== |
| - | ===== 11.C Other Natural Sources ===== | + | |
| ====Short description ==== | ====Short description ==== | ||
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| - | Lightning and corona discharge during thunderstorm events cause atmospheric chemical reactions to take place at high voltages and high temperatures. These reactions cause the production of NOx in the atmosphere. | + | Lightning and corona discharge during thunderstorm events cause atmospheric chemical reactions to take place at high voltages and high temperatures. These reactions cause the production of NO< |
| ====Methodology==== | ====Methodology==== | ||
| - | The calculation of NOx emissions from lightning uses strike counts from the German weather service and default emission factors from the EMEP/EEA guidebook. | + | The calculation of NO< |
| For the complete time series, the emissions are calculated as follows: | For the complete time series, the emissions are calculated as follows: | ||
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| ====Emission Trend==== | ====Emission Trend==== | ||
| - | The emission value is solely dependent on the strike count and varies between 1 to 2 kilotons of NOx per year. | + | The emission value is solely dependent on the strike count and varies between 1 to 3 kilotons of NOx per year. |
| Figure 1: NFR 11.C, NOx emissions from lightning | Figure 1: NFR 11.C, NOx emissions from lightning | ||
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| ==== Uncertainties ==== | ==== Uncertainties ==== | ||
| - | The AD from BLIDS does have a low uncertainty of ± 3%. The uncertainties for the emission factors are estimated to be relatively high, being a default value. Hence the overall uncertainty for the emission estimation of NOx from lightning is qualified estimated by expert judgement to be high (>50%). | + | The AD from BLIDS does have a low uncertainty of ± 3%. The uncertainties for the emission factors are estimated to be relatively high, being a default value. Hence the overall uncertainty for the emission estimation of NO< |
| ====Quality checks==== | ====Quality checks==== | ||