Impacts of the photo-driven post-depositional processing on snow nitrate and its isotopes at Summit, Greenland: a model-based study
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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2021
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-15-4207-2021 https://noa.gwlb.de/receive/cop_mods_00058043 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057693/tc-15-4207-2021.pdf https://tc.copernicus.org/articles/15/4207/2021/tc-15-4207-2021.pdf |
id |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058043 |
---|---|
record_format |
openpolar |
spelling |
ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00058043 2024-09-15T18:09:29+00:00 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 2021-09 electronic https://doi.org/10.5194/tc-15-4207-2021 https://noa.gwlb.de/receive/cop_mods_00058043 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057693/tc-15-4207-2021.pdf https://tc.copernicus.org/articles/15/4207/2021/tc-15-4207-2021.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-4207-2021 https://noa.gwlb.de/receive/cop_mods_00058043 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057693/tc-15-4207-2021.pdf https://tc.copernicus.org/articles/15/4207/2021/tc-15-4207-2021.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2021 ftnonlinearchiv https://doi.org/10.5194/tc-15-4207-2021 2024-06-26T04:38:21Z 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 Niedersächsisches Online-Archiv NOA The Cryosphere 15 9 4207 4220 |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung 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 |
article Verlagsveröffentlichung |
description |
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. |
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 |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/tc-15-4207-2021 https://noa.gwlb.de/receive/cop_mods_00058043 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057693/tc-15-4207-2021.pdf https://tc.copernicus.org/articles/15/4207/2021/tc-15-4207-2021.pdf |
genre |
Greenland ice core The Cryosphere |
genre_facet |
Greenland ice core The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-15-4207-2021 https://noa.gwlb.de/receive/cop_mods_00058043 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00057693/tc-15-4207-2021.pdf https://tc.copernicus.org/articles/15/4207/2021/tc-15-4207-2021.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt 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_ |
1810447058125979648 |