Articles | Volume 17, issue 7
https://doi.org/10.5194/acp-17-4539-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-17-4539-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| Highlight paper
| 
05 Apr 2017
Research article | Highlight paper |
| 05 Apr 2017
Constraining N2O emissions since 1940 using firn air isotope measurements in both hemispheres
Markella Prokopiou
CORRESPONDING AUTHOR
Institute for Marine and Atmospheric Research Utrecht, Utrecht, the
Netherlands
Patricia Martinerie
University of Grenoble Alpes/CNRS, IRD, IGE, 38000 Grenoble,
France
Célia J. Sapart
Institute for Marine and Atmospheric Research Utrecht, Utrecht, the
Netherlands
Laboratoire de Glaciologie, ULB, Brussels, Belgium
Emmanuel Witrant
University of Grenoble Alpes/CNRS, GIPSA-lab, 38000 Grenoble, France
Guillaume Monteil
Institute for Marine and Atmospheric Research Utrecht, Utrecht, the
Netherlands
Department of Physical Geography and Ecosystem Science, Lund
University, Lund, Sweden
Kentaro Ishijima
National Institute of Polar Research, Tokyo, Japan
Sophie Bernard
University of Grenoble Alpes/CNRS, IRD, IGE, 38000 Grenoble,
France
Jan Kaiser
Centre for Ocean and Atmospheric Sciences, School of Environmental
Sciences, University of East Anglia, Norwich, UK
Ingeborg Levin
Institute of Environmental Physics, Heidelberg University, Germany
Thomas Blunier
Centre for Ice and Climate, Niels Bohr Institute, Copenhagen,
Denmark
David Etheridge
CSIRO Marine and Atmospheric Research, Victoria, Australia
Ed Dlugokencky
NOAA Earth System Research Laboratory, Boulder, Colorado, USA
Roderik S. W. van de Wal
Institute for Marine and Atmospheric Research Utrecht, Utrecht, the
Netherlands
Thomas Röckmann
Institute for Marine and Atmospheric Research Utrecht, Utrecht, the
Netherlands
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Latest update: 27 Nov 2025
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.
Nitrous oxide is the third most important anthropogenic greenhouse gas with an increasing mole...
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