Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements
International audience A historical record of changes in the N 2 O isotope composition is important for a better understanding of the global N 2 O atmospheric budget. Here we have combined measurements of trapped gases in the firn and in ice cores of one Arctic site (North GReenland Ice core Project...
Main Authors: | , , , , , , |
---|---|
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2006
|
Subjects: | |
Online Access: | https://hal.science/hal-00328418 https://hal.science/hal-00328418/document https://hal.science/hal-00328418/file/acp-6-493-2006.pdf |
id |
ftinsu:oai:HAL:hal-00328418v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
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 Bernard, Serge Röckmann, T. Kaiser, J. Barnola, J.-M. Fischer, H. Blunier, T. Chappellaz, J. Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience A historical record of changes in the N 2 O isotope composition is important for a better understanding of the global N 2 O atmospheric budget. Here we have combined measurements of trapped gases in the firn and in ice cores of one Arctic site (North GReenland Ice core Project - NGRIP) and one Antarctic site (Berkner Island). We have performed measurements of the 18 O and position dependent 15 N isotopic composition of N 2 O. 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 decrease observed for all signatures is consistent from one pole to the other. Results obtained from the air occluded in the ice suggest a decrease of about -2.8, -2.4, -3.2 and -1.6 for d 15 N, 1 d 15 N, 2 d 15 N and d 18 O, respectively, since 1700 AD. Firn air data imply a decrease of about -1.1, -1.2, -1.0 and -0.6 for d 15 N, 1 d 15 N, 2 d 15 N and d 18 O, respectively, since 1970 AD. These results imply consistent trends from firn and ice measurements for d 15 N and d 18 O. The trends for the intramolecular distribution of 15 N are less well constrained than the bulk 15 N trends because of the larger experimental error for the position dependent 15 N measurements. The decrease in the heavy isotope content of atmospheric N 2 O can be explained by the increasing importance of agriculture for the present atmospheric N 2 O budget. |
author2 |
Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Max Planck Institute for Nuclear Physics (MPIK) Max-Planck-Gesellschaft Institute for Marine and Atmospheric Research Utrecht (IMAU) Universiteit Utrecht / Utrecht University Utrecht Department of Geosciences Princeton Princeton University Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) |
format |
Article in Journal/Newspaper |
author |
Bernard, Serge Röckmann, T. Kaiser, J. Barnola, J.-M. Fischer, H. Blunier, T. Chappellaz, J. |
author_facet |
Bernard, Serge Röckmann, T. Kaiser, J. Barnola, J.-M. Fischer, H. Blunier, T. Chappellaz, J. |
author_sort |
Bernard, Serge |
title |
Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements |
title_short |
Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements |
title_full |
Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements |
title_fullStr |
Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements |
title_full_unstemmed |
Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements |
title_sort |
constraints on n 2 o budget changes since pre-industrial time from new firn air and ice core isotope measurements |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00328418 https://hal.science/hal-00328418/document https://hal.science/hal-00328418/file/acp-6-493-2006.pdf |
genre |
Antarc* Antarctic Arctic Berkner Island Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project |
genre_facet |
Antarc* Antarctic Arctic Berkner Island Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00328418 Atmospheric Chemistry and Physics, 2006, 6 (2), pp.503 |
op_relation |
hal-00328418 https://hal.science/hal-00328418 https://hal.science/hal-00328418/document https://hal.science/hal-00328418/file/acp-6-493-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1797588025068224512 |
spelling |
ftinsu:oai:HAL:hal-00328418v1 2024-04-28T07:57:20+00:00 Constraints on N 2 O budget changes since pre-industrial time from new firn air and ice core isotope measurements Bernard, Serge Röckmann, T. Kaiser, J. Barnola, J.-M. Fischer, H. Blunier, T. Chappellaz, J. Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) Max Planck Institute for Nuclear Physics (MPIK) Max-Planck-Gesellschaft Institute for Marine and Atmospheric Research Utrecht (IMAU) Universiteit Utrecht / Utrecht University Utrecht Department of Geosciences Princeton Princeton University Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung = Alfred Wegener Institute for Polar and Marine Research = Institut Alfred-Wegener pour la recherche polaire et marine (AWI) Helmholtz-Gemeinschaft = Helmholtz Association Climate and Environmental Physics Bern (CEP) Physikalisches Institut Bern Universität Bern / University of Bern (UNIBE)-Universität Bern / University of Bern (UNIBE) 2006-02-16 https://hal.science/hal-00328418 https://hal.science/hal-00328418/document https://hal.science/hal-00328418/file/acp-6-493-2006.pdf en eng HAL CCSD European Geosciences Union hal-00328418 https://hal.science/hal-00328418 https://hal.science/hal-00328418/document https://hal.science/hal-00328418/file/acp-6-493-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00328418 Atmospheric Chemistry and Physics, 2006, 6 (2), pp.503 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftinsu 2024-04-05T00:36:33Z International audience A historical record of changes in the N 2 O isotope composition is important for a better understanding of the global N 2 O atmospheric budget. Here we have combined measurements of trapped gases in the firn and in ice cores of one Arctic site (North GReenland Ice core Project - NGRIP) and one Antarctic site (Berkner Island). We have performed measurements of the 18 O and position dependent 15 N isotopic composition of N 2 O. 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 decrease observed for all signatures is consistent from one pole to the other. Results obtained from the air occluded in the ice suggest a decrease of about -2.8, -2.4, -3.2 and -1.6 for d 15 N, 1 d 15 N, 2 d 15 N and d 18 O, respectively, since 1700 AD. Firn air data imply a decrease of about -1.1, -1.2, -1.0 and -0.6 for d 15 N, 1 d 15 N, 2 d 15 N and d 18 O, respectively, since 1970 AD. These results imply consistent trends from firn and ice measurements for d 15 N and d 18 O. The trends for the intramolecular distribution of 15 N are less well constrained than the bulk 15 N trends because of the larger experimental error for the position dependent 15 N measurements. The decrease in the heavy isotope content of atmospheric N 2 O can be explained by the increasing importance of agriculture for the present atmospheric N 2 O budget. Article in Journal/Newspaper Antarc* Antarctic Arctic Berkner Island Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project Institut national des sciences de l'Univers: HAL-INSU |