Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica
Three shallow firn cores were retrieved in the austral summers of 2011/12 and 2013/14 on the ice rises Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blaskimen Island (BI), all part of Fimbul Ice Shelf (FIS) in western Dronning Maud Land (DML), Antarctica. The cores were dated back to 1958 (KC)...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Uppsala universitet, Luft-, vatten- och landskapslära
2016
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306651 https://doi.org/10.5194/tc-10-2763-2016 |
id |
ftuppsalauniv:oai:DiVA.org:uu-306651 |
---|---|
record_format |
openpolar |
spelling |
ftuppsalauniv:oai:DiVA.org:uu-306651 2023-05-15T14:00:26+02:00 Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica Vega, Carmen P. Schlosser, E. Divine, D. V. Kohler, J. Martma, T. Eichler, A. Schwikowski, M. Isaksson, E. 2016 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306651 https://doi.org/10.5194/tc-10-2763-2016 eng eng Uppsala universitet, Luft-, vatten- och landskapslära Norwegian Polar Res Inst, N-9296 Tromso, Norway Univ Innsbruck, Inst Atmospher & Cryospher Sci, Innsbruck, Austria; Austrian Polar Res Inst, Vienna, Austria Tallinn Univ Technol, Inst Geol, Tallinn, Estonia Paul Scherrer Inst, CH-5232 Villigen, Switzerland The Cryosphere Discussions, 1994-0432, 2016, 10:6, s. 2763-2777 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306651 doi:10.5194/tc-10-2763-2016 ISI:000387870800001 info:eu-repo/semantics/openAccess Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Article in journal info:eu-repo/semantics/article text 2016 ftuppsalauniv https://doi.org/10.5194/tc-10-2763-2016 2023-02-23T21:52:11Z Three shallow firn cores were retrieved in the austral summers of 2011/12 and 2013/14 on the ice rises Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blaskimen Island (BI), all part of Fimbul Ice Shelf (FIS) in western Dronning Maud Land (DML), Antarctica. The cores were dated back to 1958 (KC), 1995 (KM), and 1996 (BI) by annual layer counting using high-resolution oxygen isotope (delta O-18) data, and by identifying volcanic horizons using non-sea-salt sulfate (nssSO(4)(2-)) data. The water stable isotope records show that the atmospheric signature of the annual snow accumulation cycle is well preserved in the firn column, especially at KM and BI. We are able to determine the annual surface mass balance (SMB), as well as the mean SMB values between identified volcanic horizons. Average SMB at the KM and BI sites (0.68 and 0.70 mw.e.yr(-1)) was higher than at the KC site (0.24 mw.e.yr(-1)), and there was greater temporal variability as well. Trends in the SMB and delta O-18 records from the KC core over the period of 1958-2012 agree well with other previously investigated cores in the area, thus the KC site could be considered the most representative of the climate of the region. Cores from KM and BI appear to be more affected by local meteorological conditions and surface topography. Our results suggest that the ice rises are suitable sites for the retrieval of longer firn and ice cores, but that BI has the best preserved seasonal cycles of the three records and is thus the most optimal site for high-resolution studies of temporal variability of the climate signal. Deuterium ex-cess data suggest a possible effect of seasonal moisture transport changes on the annual isotopic signal. In agreement with previous studies, large-scale atmospheric circulation patterns most likely provide the dominant influence on water stable isotope ratios preserved at the core sites. Article in Journal/Newspaper Antarc* Antarctica DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf The Cryosphere The Cryosphere Discussions Uppsala University: Publications (DiVA) Austral Blaskimen Island ENVELOPE(-3.000,-3.000,-70.500,-70.500) Dronning Maud Land Fimbul Ice Shelf ENVELOPE(-0.500,-0.500,-70.750,-70.750) Kupol ENVELOPE(68.533,68.533,-72.633,-72.633) Moskovskij ENVELOPE(1.417,1.417,-70.133,-70.133) The Cryosphere 10 6 2763 2777 |
institution |
Open Polar |
collection |
Uppsala University: Publications (DiVA) |
op_collection_id |
ftuppsalauniv |
language |
English |
topic |
Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap |
spellingShingle |
Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap Vega, Carmen P. Schlosser, E. Divine, D. V. Kohler, J. Martma, T. Eichler, A. Schwikowski, M. Isaksson, E. Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica |
topic_facet |
Other Earth and Related Environmental Sciences Annan geovetenskap och miljövetenskap |
description |
Three shallow firn cores were retrieved in the austral summers of 2011/12 and 2013/14 on the ice rises Kupol Ciolkovskogo (KC), Kupol Moskovskij (KM), and Blaskimen Island (BI), all part of Fimbul Ice Shelf (FIS) in western Dronning Maud Land (DML), Antarctica. The cores were dated back to 1958 (KC), 1995 (KM), and 1996 (BI) by annual layer counting using high-resolution oxygen isotope (delta O-18) data, and by identifying volcanic horizons using non-sea-salt sulfate (nssSO(4)(2-)) data. The water stable isotope records show that the atmospheric signature of the annual snow accumulation cycle is well preserved in the firn column, especially at KM and BI. We are able to determine the annual surface mass balance (SMB), as well as the mean SMB values between identified volcanic horizons. Average SMB at the KM and BI sites (0.68 and 0.70 mw.e.yr(-1)) was higher than at the KC site (0.24 mw.e.yr(-1)), and there was greater temporal variability as well. Trends in the SMB and delta O-18 records from the KC core over the period of 1958-2012 agree well with other previously investigated cores in the area, thus the KC site could be considered the most representative of the climate of the region. Cores from KM and BI appear to be more affected by local meteorological conditions and surface topography. Our results suggest that the ice rises are suitable sites for the retrieval of longer firn and ice cores, but that BI has the best preserved seasonal cycles of the three records and is thus the most optimal site for high-resolution studies of temporal variability of the climate signal. Deuterium ex-cess data suggest a possible effect of seasonal moisture transport changes on the annual isotopic signal. In agreement with previous studies, large-scale atmospheric circulation patterns most likely provide the dominant influence on water stable isotope ratios preserved at the core sites. |
format |
Article in Journal/Newspaper |
author |
Vega, Carmen P. Schlosser, E. Divine, D. V. Kohler, J. Martma, T. Eichler, A. Schwikowski, M. Isaksson, E. |
author_facet |
Vega, Carmen P. Schlosser, E. Divine, D. V. Kohler, J. Martma, T. Eichler, A. Schwikowski, M. Isaksson, E. |
author_sort |
Vega, Carmen P. |
title |
Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica |
title_short |
Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica |
title_full |
Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica |
title_fullStr |
Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica |
title_full_unstemmed |
Surface mass balance and water stable isotopes derived from firn cores on three ice rises, Fimbul Ice Shelf, Antarctica |
title_sort |
surface mass balance and water stable isotopes derived from firn cores on three ice rises, fimbul ice shelf, antarctica |
publisher |
Uppsala universitet, Luft-, vatten- och landskapslära |
publishDate |
2016 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306651 https://doi.org/10.5194/tc-10-2763-2016 |
long_lat |
ENVELOPE(-3.000,-3.000,-70.500,-70.500) ENVELOPE(-0.500,-0.500,-70.750,-70.750) ENVELOPE(68.533,68.533,-72.633,-72.633) ENVELOPE(1.417,1.417,-70.133,-70.133) |
geographic |
Austral Blaskimen Island Dronning Maud Land Fimbul Ice Shelf Kupol Moskovskij |
geographic_facet |
Austral Blaskimen Island Dronning Maud Land Fimbul Ice Shelf Kupol Moskovskij |
genre |
Antarc* Antarctica DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf The Cryosphere The Cryosphere Discussions |
genre_facet |
Antarc* Antarctica DML Dronning Maud Land Fimbul Ice Shelf Ice Shelf The Cryosphere The Cryosphere Discussions |
op_relation |
The Cryosphere Discussions, 1994-0432, 2016, 10:6, s. 2763-2777 http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-306651 doi:10.5194/tc-10-2763-2016 ISI:000387870800001 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-10-2763-2016 |
container_title |
The Cryosphere |
container_volume |
10 |
container_issue |
6 |
container_start_page |
2763 |
op_container_end_page |
2777 |
_version_ |
1766269527060905984 |