Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica
A new 21.3m firn core was drilled in 2015 at a coastal Antarctic high-accumulation site in Adélie Land (66.78◦ S; 139.56◦ E, 602 m a.s.l.), named Terre Adélie 192A (TA192A). The mean isotopic values (−19.3 ‰ ± 3.1 ‰ for δ18O and 5.4 ‰±2.2 ‰ for deuterium excess) are consistent with other coastal Ant...
Published in: | The Cryosphere |
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Online Access: | https://epic.awi.de/id/eprint/49575/ https://epic.awi.de/id/eprint/49575/1/Goursaud_Cryosphere-2019.pdf https://doi.org/10.5194/tc-13-1297-2019 https://hdl.handle.net/10013/epic.44d90480-ef69-4361-bd5c-9bb2e8541935 https://hdl.handle.net/ |
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ftawi:oai:epic.awi.de:49575 2023-05-15T13:45:21+02:00 Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica Goursaud, Sentia Masson-Delmotte, Valérie Favier, Vincent Preunkert, Suzanne Legrand, Michel Minster, Bénédicte Werner, Martin 2019-04-24 application/pdf https://epic.awi.de/id/eprint/49575/ https://epic.awi.de/id/eprint/49575/1/Goursaud_Cryosphere-2019.pdf https://doi.org/10.5194/tc-13-1297-2019 https://hdl.handle.net/10013/epic.44d90480-ef69-4361-bd5c-9bb2e8541935 https://hdl.handle.net/ unknown Copernicus https://epic.awi.de/id/eprint/49575/1/Goursaud_Cryosphere-2019.pdf https://hdl.handle.net/ Goursaud, S. , Masson-Delmotte, V. , Favier, V. , Preunkert, S. , Legrand, M. , Minster, B. and Werner, M. orcid:0000-0002-6473-0243 (2019) Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica , The Cryosphere, 13 (4), pp. 1297-1324 . doi:10.5194/tc-13-1297-2019 <https://doi.org/10.5194/tc-13-1297-2019> , hdl:10013/epic.44d90480-ef69-4361-bd5c-9bb2e8541935 EPIC3The Cryosphere, Copernicus, 13(4), pp. 1297-1324, ISSN: 1994-0424 Article isiRev 2019 ftawi https://doi.org/10.5194/tc-13-1297-2019 2021-12-24T15:44:42Z A new 21.3m firn core was drilled in 2015 at a coastal Antarctic high-accumulation site in Adélie Land (66.78◦ S; 139.56◦ E, 602 m a.s.l.), named Terre Adélie 192A (TA192A). The mean isotopic values (−19.3 ‰ ± 3.1 ‰ for δ18O and 5.4 ‰±2.2 ‰ for deuterium excess) are consistent with other coastal Antarctic values. No significant isotope–temperature relationship can be evidenced at any timescale. This rules out a simple interpretation in terms of local temperature. An observed asymmetry in the δ18O seasonal cycle may be explained by the precipitation of air masses coming from the eastern and western sectors in autumn and winter, recorded in the d-excess signal showing outstanding values in austral spring versus autumn. Significant positive trends are observed in the annual d-excess record and local sea ice extent (135–145◦ E) over the period 1998–2014. However, process studies focusing on resulting isotopic compositions and particularly the deuterium excess–δ18O relationship, evidenced as a potential fingerprint of moisture origins, as well as the collection of more isotopic measurements in Adélie Land are needed for an accurate interpretation of our signals. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice The Cryosphere Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Austral Terre Adélie ENVELOPE(139.000,139.000,-67.000,-67.000) Terre-Adélie ENVELOPE(138.991,138.991,-59.999,-59.999) The Cryosphere 13 4 1297 1324 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A new 21.3m firn core was drilled in 2015 at a coastal Antarctic high-accumulation site in Adélie Land (66.78◦ S; 139.56◦ E, 602 m a.s.l.), named Terre Adélie 192A (TA192A). The mean isotopic values (−19.3 ‰ ± 3.1 ‰ for δ18O and 5.4 ‰±2.2 ‰ for deuterium excess) are consistent with other coastal Antarctic values. No significant isotope–temperature relationship can be evidenced at any timescale. This rules out a simple interpretation in terms of local temperature. An observed asymmetry in the δ18O seasonal cycle may be explained by the precipitation of air masses coming from the eastern and western sectors in autumn and winter, recorded in the d-excess signal showing outstanding values in austral spring versus autumn. Significant positive trends are observed in the annual d-excess record and local sea ice extent (135–145◦ E) over the period 1998–2014. However, process studies focusing on resulting isotopic compositions and particularly the deuterium excess–δ18O relationship, evidenced as a potential fingerprint of moisture origins, as well as the collection of more isotopic measurements in Adélie Land are needed for an accurate interpretation of our signals. |
format |
Article in Journal/Newspaper |
author |
Goursaud, Sentia Masson-Delmotte, Valérie Favier, Vincent Preunkert, Suzanne Legrand, Michel Minster, Bénédicte Werner, Martin |
spellingShingle |
Goursaud, Sentia Masson-Delmotte, Valérie Favier, Vincent Preunkert, Suzanne Legrand, Michel Minster, Bénédicte Werner, Martin Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica |
author_facet |
Goursaud, Sentia Masson-Delmotte, Valérie Favier, Vincent Preunkert, Suzanne Legrand, Michel Minster, Bénédicte Werner, Martin |
author_sort |
Goursaud, Sentia |
title |
Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica |
title_short |
Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica |
title_full |
Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica |
title_fullStr |
Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica |
title_full_unstemmed |
Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica |
title_sort |
challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from adélie land, coastal antarctica |
publisher |
Copernicus |
publishDate |
2019 |
url |
https://epic.awi.de/id/eprint/49575/ https://epic.awi.de/id/eprint/49575/1/Goursaud_Cryosphere-2019.pdf https://doi.org/10.5194/tc-13-1297-2019 https://hdl.handle.net/10013/epic.44d90480-ef69-4361-bd5c-9bb2e8541935 https://hdl.handle.net/ |
long_lat |
ENVELOPE(139.000,139.000,-67.000,-67.000) ENVELOPE(138.991,138.991,-59.999,-59.999) |
geographic |
Antarctic Austral Terre Adélie Terre-Adélie |
geographic_facet |
Antarctic Austral Terre Adélie Terre-Adélie |
genre |
Antarc* Antarctic Antarctica Sea ice The Cryosphere |
genre_facet |
Antarc* Antarctic Antarctica Sea ice The Cryosphere |
op_source |
EPIC3The Cryosphere, Copernicus, 13(4), pp. 1297-1324, ISSN: 1994-0424 |
op_relation |
https://epic.awi.de/id/eprint/49575/1/Goursaud_Cryosphere-2019.pdf https://hdl.handle.net/ Goursaud, S. , Masson-Delmotte, V. , Favier, V. , Preunkert, S. , Legrand, M. , Minster, B. and Werner, M. orcid:0000-0002-6473-0243 (2019) Challenges associated with the climatic interpretation of water stable isotope records from a highly resolved firn core from Adélie Land, coastal Antarctica , The Cryosphere, 13 (4), pp. 1297-1324 . doi:10.5194/tc-13-1297-2019 <https://doi.org/10.5194/tc-13-1297-2019> , hdl:10013/epic.44d90480-ef69-4361-bd5c-9bb2e8541935 |
op_doi |
https://doi.org/10.5194/tc-13-1297-2019 |
container_title |
The Cryosphere |
container_volume |
13 |
container_issue |
4 |
container_start_page |
1297 |
op_container_end_page |
1324 |
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1766221584074276864 |