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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
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Nitrous oxide is the third most important anthropogenic greenhouse gas with an increasing mole fraction. To understand its natural and anthropogenic sources we employ isotope measurements. Results show that while the N2O mole fraction increases, its heavy isotope content decreases. The isotopic changes observed underline the dominance of agricultural emissions especially at the early part of the record, whereas in the later decades the contribution from other anthropogenic sources increases.
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Articles | Volume 17, issue 7
Atmos. Chem. Phys., 17, 4539–4564, 2017
https://doi.org/10.5194/acp-17-4539-2017
Atmos. Chem. Phys., 17, 4539–4564, 2017
https://doi.org/10.5194/acp-17-4539-2017

Research article 05 Apr 2017

Research article | 05 Apr 2017

Constraining N2O emissions since 1940 using firn air isotope measurements in both hemispheres

Markella Prokopiou et al.

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Short summary
Nitrous oxide is the third most important anthropogenic greenhouse gas with an increasing mole fraction. To understand its natural and anthropogenic sources we employ isotope measurements. Results show that while the N2O mole fraction increases, its heavy isotope content decreases. The isotopic changes observed underline the dominance of agricultural emissions especially at the early part of the record, whereas in the later decades the contribution from other anthropogenic sources increases.
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