Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study
International audience Abstract. Atmospheric information embedded in ice-core nitrate is disturbed by post-depositional processing. Here we used a layered snow photochemical column model to explicitly investigate the effects of post-depositional processing on snow nitrate and its isotopes (δ15N and...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2021
|
Subjects: | |
Online Access: | https://hal.science/hal-03402178 https://hal.science/hal-03402178/document https://hal.science/hal-03402178/file/Impacts%20of%20the%20photo-driven%20post-depositional%20processing%20on%20snow%20nitrate%20and%20its%20isotopes%20at%20Summit,%20Greenland%20a%20model-based%20study.pdf https://doi.org/10.5194/tc-15-4207-2021 |
id |
ftunivnantes:oai:HAL:hal-03402178v1 |
---|---|
record_format |
openpolar |
spelling |
ftunivnantes:oai:HAL:hal-03402178v1 2023-05-15T16:28:20+02:00 Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study Jiang, Zhuang Alexander, Becky Savarino, Joel Erbland, Joseph Geng, Lei Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2021 https://hal.science/hal-03402178 https://hal.science/hal-03402178/document https://hal.science/hal-03402178/file/Impacts%20of%20the%20photo-driven%20post-depositional%20processing%20on%20snow%20nitrate%20and%20its%20isotopes%20at%20Summit,%20Greenland%20a%20model-based%20study.pdf https://doi.org/10.5194/tc-15-4207-2021 en eng HAL CCSD Copernicus info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-4207-2021 hal-03402178 https://hal.science/hal-03402178 https://hal.science/hal-03402178/document https://hal.science/hal-03402178/file/Impacts%20of%20the%20photo-driven%20post-depositional%20processing%20on%20snow%20nitrate%20and%20its%20isotopes%20at%20Summit,%20Greenland%20a%20model-based%20study.pdf doi:10.5194/tc-15-4207-2021 info:eu-repo/semantics/OpenAccess ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-03402178 The Cryosphere, 2021, 15 (9), pp.4207-4220. ⟨10.5194/tc-15-4207-2021⟩ [SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2021 ftunivnantes https://doi.org/10.5194/tc-15-4207-2021 2023-03-01T02:10:38Z International audience Abstract. Atmospheric information embedded in ice-core nitrate is disturbed by post-depositional processing. Here we used a layered snow photochemical column model to explicitly investigate the effects of post-depositional processing on snow nitrate and its isotopes (δ15N and Δ17O) at Summit, Greenland, where post-depositional processing was thought to be minimal due to the high snow accumulation rate. We found significant redistribution of nitrate in the upper snowpack through photolysis, and up to 21 % of nitrate was lost and/or redistributed after deposition. The model indicates post-depositional processing can reproduce much of the observed δ15N seasonality, while seasonal variations in δ15N of primary nitrate are needed to reconcile the timing of the lowest seasonal δ15N. In contrast, post-depositional processing can only induce less than 2.1 ‰ seasonal Δ17O change, much smaller than the observation (9 ‰) that is ultimately determined by seasonal differences in nitrate formation pathway. Despite significant redistribution of snow nitrate in the photic zone and the associated effects on δ15N seasonality, the net annual effect of post-depositional processing is relatively small, suggesting preservation of atmospheric signals at the annual scale under the present Summit conditions. But at longer timescales when large changes in snow accumulation rate occur this post-depositional processing could become a major driver of the δ15N variability in ice-core nitrate. Article in Journal/Newspaper Greenland ice core The Cryosphere Université de Nantes: HAL-UNIV-NANTES Greenland The Cryosphere 15 9 4207 4220 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Jiang, Zhuang Alexander, Becky Savarino, Joel Erbland, Joseph Geng, Lei Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
topic_facet |
[SDU.STU.GL]Sciences of the Universe [physics]/Earth Sciences/Glaciology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience Abstract. Atmospheric information embedded in ice-core nitrate is disturbed by post-depositional processing. Here we used a layered snow photochemical column model to explicitly investigate the effects of post-depositional processing on snow nitrate and its isotopes (δ15N and Δ17O) at Summit, Greenland, where post-depositional processing was thought to be minimal due to the high snow accumulation rate. We found significant redistribution of nitrate in the upper snowpack through photolysis, and up to 21 % of nitrate was lost and/or redistributed after deposition. The model indicates post-depositional processing can reproduce much of the observed δ15N seasonality, while seasonal variations in δ15N of primary nitrate are needed to reconcile the timing of the lowest seasonal δ15N. In contrast, post-depositional processing can only induce less than 2.1 ‰ seasonal Δ17O change, much smaller than the observation (9 ‰) that is ultimately determined by seasonal differences in nitrate formation pathway. Despite significant redistribution of snow nitrate in the photic zone and the associated effects on δ15N seasonality, the net annual effect of post-depositional processing is relatively small, suggesting preservation of atmospheric signals at the annual scale under the present Summit conditions. But at longer timescales when large changes in snow accumulation rate occur this post-depositional processing could become a major driver of the δ15N variability in ice-core nitrate. |
author2 |
Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Jiang, Zhuang Alexander, Becky Savarino, Joel Erbland, Joseph Geng, Lei |
author_facet |
Jiang, Zhuang Alexander, Becky Savarino, Joel Erbland, Joseph Geng, Lei |
author_sort |
Jiang, Zhuang |
title |
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
title_short |
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
title_full |
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
title_fullStr |
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
title_full_unstemmed |
Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study |
title_sort |
impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at summit, greenland: a model-based study |
publisher |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03402178 https://hal.science/hal-03402178/document https://hal.science/hal-03402178/file/Impacts%20of%20the%20photo-driven%20post-depositional%20processing%20on%20snow%20nitrate%20and%20its%20isotopes%20at%20Summit,%20Greenland%20a%20model-based%20study.pdf https://doi.org/10.5194/tc-15-4207-2021 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core The Cryosphere |
genre_facet |
Greenland ice core The Cryosphere |
op_source |
ISSN: 1994-0424 EISSN: 1994-0416 The Cryosphere https://hal.science/hal-03402178 The Cryosphere, 2021, 15 (9), pp.4207-4220. ⟨10.5194/tc-15-4207-2021⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-15-4207-2021 hal-03402178 https://hal.science/hal-03402178 https://hal.science/hal-03402178/document https://hal.science/hal-03402178/file/Impacts%20of%20the%20photo-driven%20post-depositional%20processing%20on%20snow%20nitrate%20and%20its%20isotopes%20at%20Summit,%20Greenland%20a%20model-based%20study.pdf doi:10.5194/tc-15-4207-2021 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/tc-15-4207-2021 |
container_title |
The Cryosphere |
container_volume |
15 |
container_issue |
9 |
container_start_page |
4207 |
op_container_end_page |
4220 |
_version_ |
1766017981059432448 |