The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source
International audience We have performed high-precision measurements of the 18 O and position dependent 15 N isotopic composition of N 2 O from Antarctic firn air samples. By comparing these data to simulations carried out with a firn air diffusion model, we have reconstructed the temporal evolution...
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ftinsu:oai:HAL:hal-00300977v1 2023-11-12T04:02:55+01:00 The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source Röckmann, T. Kaiser, J. Brenninkmeijer, C. A. M. Max Planck Institute for Nuclear Physics (MPIK) Max-Planck-Gesellschaft Max Planck Institute for Chemistry (MPIC) 2002-11-13 https://hal.science/hal-00300977 https://hal.science/hal-00300977/document https://hal.science/hal-00300977/file/acpd-2-2021-2002.pdf en eng HAL CCSD European Geosciences Union hal-00300977 https://hal.science/hal-00300977 https://hal.science/hal-00300977/document https://hal.science/hal-00300977/file/acpd-2-2021-2002.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00300977 Atmospheric Chemistry and Physics Discussions, 2002, 2 (6), pp.2021-2043 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2002 ftinsu 2023-10-25T16:27:13Z International audience We have performed high-precision measurements of the 18 O and position dependent 15 N isotopic composition of N 2 O from Antarctic firn air samples. By comparing these data to simulations carried out with a firn air diffusion model, we have reconstructed the temporal evolution of the N 2 O isotope signatures since pre-industrial times. The heavy isotope content of atmospheric N 2 O is presently decreasing for all signatures at rates of about -0.038%o yr -1 for 1 d 15 N, -0.044%o yr -1 for 2 d 15 N and -0.025%o yr -1 for d 18 O. The total decrease since pre-industrial times is estimated to be about -2%o for d 15 N at both positions and -1.2%o for d 18 O. Isotope budget calculations using these trends and recent stratospheric measurements allow to isotopically characterize the present and the pre-industrial global average N 2 O source, as well as the anthropogenic N 2 O emissions that have caused the global N 2 O increase since pre-industrial times. The increased fluxes from the depleted surface sources alone are insufficient to explain the inferred temporal isotope changes. In addition, the global average N 2 O source signature is calculated to be significantly depleted today relative to the pre-industrial value, in agreement with recent indications from soil emission measurements. Article in Journal/Newspaper Antarc* Antarctic Institut national des sciences de l'Univers: HAL-INSU Antarctic |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Röckmann, T. Kaiser, J. Brenninkmeijer, C. A. M. The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience We have performed high-precision measurements of the 18 O and position dependent 15 N isotopic composition of N 2 O from Antarctic firn air samples. By comparing these data to simulations carried out with a firn air diffusion model, we have reconstructed the temporal evolution of the N 2 O isotope signatures since pre-industrial times. The heavy isotope content of atmospheric N 2 O is presently decreasing for all signatures at rates of about -0.038%o yr -1 for 1 d 15 N, -0.044%o yr -1 for 2 d 15 N and -0.025%o yr -1 for d 18 O. The total decrease since pre-industrial times is estimated to be about -2%o for d 15 N at both positions and -1.2%o for d 18 O. Isotope budget calculations using these trends and recent stratospheric measurements allow to isotopically characterize the present and the pre-industrial global average N 2 O source, as well as the anthropogenic N 2 O emissions that have caused the global N 2 O increase since pre-industrial times. The increased fluxes from the depleted surface sources alone are insufficient to explain the inferred temporal isotope changes. In addition, the global average N 2 O source signature is calculated to be significantly depleted today relative to the pre-industrial value, in agreement with recent indications from soil emission measurements. |
author2 |
Max Planck Institute for Nuclear Physics (MPIK) Max-Planck-Gesellschaft Max Planck Institute for Chemistry (MPIC) |
format |
Article in Journal/Newspaper |
author |
Röckmann, T. Kaiser, J. Brenninkmeijer, C. A. M. |
author_facet |
Röckmann, T. Kaiser, J. Brenninkmeijer, C. A. M. |
author_sort |
Röckmann, T. |
title |
The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source |
title_short |
The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source |
title_full |
The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source |
title_fullStr |
The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source |
title_full_unstemmed |
The isotopic fingerprint of the pre-industrial and the anthropogenic N 2 O source |
title_sort |
isotopic fingerprint of the pre-industrial and the anthropogenic n 2 o source |
publisher |
HAL CCSD |
publishDate |
2002 |
url |
https://hal.science/hal-00300977 https://hal.science/hal-00300977/document https://hal.science/hal-00300977/file/acpd-2-2021-2002.pdf |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
ISSN: 1680-7367 EISSN: 1680-7375 Atmospheric Chemistry and Physics Discussions https://hal.science/hal-00300977 Atmospheric Chemistry and Physics Discussions, 2002, 2 (6), pp.2021-2043 |
op_relation |
hal-00300977 https://hal.science/hal-00300977 https://hal.science/hal-00300977/document https://hal.science/hal-00300977/file/acpd-2-2021-2002.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782335537612324864 |