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JRC-AL – Expert Meeting on Cat.4D reporting – 21/22.10.2004 Indirect emissions of N 2 O resulting from energy-related emissions of NO x Adrian Leip Joint.

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Presentation on theme: "JRC-AL – Expert Meeting on Cat.4D reporting – 21/22.10.2004 Indirect emissions of N 2 O resulting from energy-related emissions of NO x Adrian Leip Joint."— Presentation transcript:

1 JRC-AL – Expert Meeting on Cat.4D reporting – 21/ Indirect emissions of N 2 O resulting from energy-related emissions of NO x Adrian Leip Joint Research Centre

2 JRC-AL – Expert Meeting on Cat.4D reporting – 21/ Nitrogen oxides are indirect greenhouse gases. They have been the target of environmental policies for their role in forming ozone (O3), as well for their direct acidification effect. (IPCC, 2000)

3 Indirect N 2 O emissions from NOx (Gg N 2 O-N) [1] [1] ATBEDKFIFRDEGRIEITLUNLPTESSEUK [1][1] The emissions of NO x are reported on a full molecular basis assuming that all NO x emissions are emitted as NO 2 (IPCC 1997, page 1.37). Thus, the indirect N 2 O emissions can be calculated by applying the default N 2 O emission factor of 1% to the amount of nitrogen emitted as NO x (converting factor: 14/46) SIGNIFICANCE Increase of total N 2 O emissions ATBEDKFIFRDEGRIEITLUNLPTESSEUK 5%3%4%5%3%4%3%2%4%26%4%7%10%4%6% Increase of total GHG emissions and removals ATBEDKFIFRDEGRIEITLUNLPTESSEUK 0.4%0.3%0.5% 0.4%0.2%0.4%0.3%0.4%0.2%0.3%0.5%0.8% 0.4%

4 JRC-AL – Expert Meeting on Cat.4D reporting – 21/ CONCLUSIONS For N 2 O emissions, energy-related indirect emissions of N 2 O are a significant contributor of 2% - 26% Energy-related indirect emissions of N2O remain <1% of total greenhouse gas emissions and removals.

5 JRC-AL – Expert Meeting on Cat.4D reporting – 21/ RECOMMENDATIONS Energy-related emissions of NO x are leading to N 2 O emissions further down in the nitrogen cascade. They can significantly contribute to total anthropogenic N 2 O emissions. Considering these emissions in the guidelines would ensure methodological consistency across the sectors.

6 JRC-AL – Expert Meeting on Cat.4D reporting – 21/ THANK YOU FOR YOUR ATTENTION !


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