Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula
Abstract Stable water isotope records of six firn cores retrieved from two adjacent plateaus on the northern Antarctic Peninsula between 2014 and 2016 are presented and investigated for their connections with firn-core glacio-chemical data, meteorological records and modelling results. Average annua...
Published in: | Journal of Glaciology |
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Language: | English |
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Cambridge University Press (CUP)
2023
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Online Access: | http://dx.doi.org/10.1017/jog.2023.79 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000795 |
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crcambridgeupr:10.1017/jog.2023.79 2024-09-15T17:43:52+00:00 Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula Hoffmann-Abdi, Kirstin Meyer, Hanno Fernandoy, Francisco Freitag, Johannes Shaw, Fyntan M. Werner, Martin Thomas, Elizabeth R. McConnell, Joseph R. Schneider, Christoph Fondo Nacional de Desarrollo Científico y Tecnológico 2023 http://dx.doi.org/10.1017/jog.2023.79 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000795 en eng Cambridge University Press (CUP) http://creativecommons.org/licenses/by/4.0/ Journal of Glaciology page 1-19 ISSN 0022-1430 1727-5652 journal-article 2023 crcambridgeupr https://doi.org/10.1017/jog.2023.79 2024-08-21T04:04:24Z Abstract Stable water isotope records of six firn cores retrieved from two adjacent plateaus on the northern Antarctic Peninsula between 2014 and 2016 are presented and investigated for their connections with firn-core glacio-chemical data, meteorological records and modelling results. Average annual accumulation rates of 2500 kg m −2 a −1 largely reduce the modification of isotopic signals in the snowpack by post-depositional processes, allowing excellent signal preservation in space and time. Comparison of firn-core and ECHAM6-wiso modelled δ 18 O and d-excess records reveals a large agreement on annual and sub-annual scales, suggesting firn-core stable water isotopes to be representative of specific synoptic situations. The six firn cores exhibit highly similar isotopic patterns in the overlapping period (2013), which seem to be related to temporal changes in moisture sources rather than local near-surface air temperatures. Backward trajectories calculated with the HYSPLIT model suggest that prominent δ 18 O minima in 2013 associated with elevated sea salt concentrations are related to long-range moisture transport dominated by westerly winds during positive SAM phases. In contrast, a broad δ 18 O maximum in the same year accompanied by increased concentrations of black carbon and mineral dust corresponds to the advection of more locally derived moisture with northerly flow components (South America) when the SAM is negative. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Journal of Glaciology Cambridge University Press Journal of Glaciology 1 19 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Abstract Stable water isotope records of six firn cores retrieved from two adjacent plateaus on the northern Antarctic Peninsula between 2014 and 2016 are presented and investigated for their connections with firn-core glacio-chemical data, meteorological records and modelling results. Average annual accumulation rates of 2500 kg m −2 a −1 largely reduce the modification of isotopic signals in the snowpack by post-depositional processes, allowing excellent signal preservation in space and time. Comparison of firn-core and ECHAM6-wiso modelled δ 18 O and d-excess records reveals a large agreement on annual and sub-annual scales, suggesting firn-core stable water isotopes to be representative of specific synoptic situations. The six firn cores exhibit highly similar isotopic patterns in the overlapping period (2013), which seem to be related to temporal changes in moisture sources rather than local near-surface air temperatures. Backward trajectories calculated with the HYSPLIT model suggest that prominent δ 18 O minima in 2013 associated with elevated sea salt concentrations are related to long-range moisture transport dominated by westerly winds during positive SAM phases. In contrast, a broad δ 18 O maximum in the same year accompanied by increased concentrations of black carbon and mineral dust corresponds to the advection of more locally derived moisture with northerly flow components (South America) when the SAM is negative. |
author2 |
Fondo Nacional de Desarrollo Científico y Tecnológico |
format |
Article in Journal/Newspaper |
author |
Hoffmann-Abdi, Kirstin Meyer, Hanno Fernandoy, Francisco Freitag, Johannes Shaw, Fyntan M. Werner, Martin Thomas, Elizabeth R. McConnell, Joseph R. Schneider, Christoph |
spellingShingle |
Hoffmann-Abdi, Kirstin Meyer, Hanno Fernandoy, Francisco Freitag, Johannes Shaw, Fyntan M. Werner, Martin Thomas, Elizabeth R. McConnell, Joseph R. Schneider, Christoph Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula |
author_facet |
Hoffmann-Abdi, Kirstin Meyer, Hanno Fernandoy, Francisco Freitag, Johannes Shaw, Fyntan M. Werner, Martin Thomas, Elizabeth R. McConnell, Joseph R. Schneider, Christoph |
author_sort |
Hoffmann-Abdi, Kirstin |
title |
Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula |
title_short |
Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula |
title_full |
Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula |
title_fullStr |
Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula |
title_full_unstemmed |
Deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the Antarctic Peninsula |
title_sort |
deciphering stable water isotope records of firn cores from a strongly maritime, high-accumulation site on the antarctic peninsula |
publisher |
Cambridge University Press (CUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1017/jog.2023.79 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143023000795 |
genre |
Antarc* Antarctic Antarctic Peninsula Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Journal of Glaciology |
op_source |
Journal of Glaciology page 1-19 ISSN 0022-1430 1727-5652 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1017/jog.2023.79 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
19 |
_version_ |
1810491071475482624 |