Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica
Four firn cores were retrieved in 2007 at two ridges in the area of the Ekström Ice Shelf, Dronning Maud Land, coastal East Antarctica, in order to investigate the recent regional climate variability and the potential for future extraction of an intermediate-depth core. Stable water-isotope analysis...
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International Glaciological Society
2010
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ftunivbern:oai:boris.unibe.ch:4626 2023-08-20T04:01:24+02:00 Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob 2010 application/pdf https://boris.unibe.ch/4626/1/temporal-and-spatial-variation-of-stable-isotope-ratios-and-accumulation-rates-in-the-hinterland-of-neumayer-station-east-antarctica.pdf https://boris.unibe.ch/4626/ eng eng International Glaciological Society https://boris.unibe.ch/4626/ info:eu-repo/semantics/restrictedAccess Fernandoy, Francisco; Meyer, Hanno; Oerter, Hans; Wilhelms, Frank; Graf, Wolfgang; Schwander, Jakob (2010). Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica. Journal of glaciology, 56(198), pp. 673-687. Cambridge: International Glaciological Society 10.3189/002214310793146296 <http://dx.doi.org/10.3189/002214310793146296> info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2010 ftunivbern https://doi.org/10.3189/002214310793146296 2023-07-31T20:27:00Z Four firn cores were retrieved in 2007 at two ridges in the area of the Ekström Ice Shelf, Dronning Maud Land, coastal East Antarctica, in order to investigate the recent regional climate variability and the potential for future extraction of an intermediate-depth core. Stable water-isotope analysis, tritium content and electrical conductivity were used to date the cores. For the period 1981–2006 a strong and significant correlation between the stable-isotope composition of firn cores in the hinterland and mean monthly air temperatures at Neumayer station was (r = 0.54−0.71). No atmospheric warming or cooling trend is inferred from our stable-isotope data for the period 1962–2006. The stable-isotope record of the ice/firn cores could expand well beyond the meteorological record of the region. No significant temporal variation of accumulation rates was detected. However, decreasing accumulation rates were found from coast to hinterland, as well as from east (Halvfarryggen) to west (Søråsen). The deuterium excess (d) exhibits similar differences (higher d at Søråsen, lower d at Halvfarryggen), with a weak negative temporal trend on Halvfarryggen (0.04‰ a−1), probably implying increasing oceanic input. We conclude that Halvfarryggen acts as a natural barrier for moisture-carrying air masses circulating in the region from east to west. Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Dronning Maud Land East Antarctica Ice Shelf Journal of Glaciology BORIS (Bern Open Repository and Information System, University of Bern) Dronning Maud Land East Antarctica Ekström Ice Shelf ENVELOPE(-8.000,-8.000,-71.000,-71.000) Halvfarryggen ENVELOPE(-6.500,-6.500,-71.167,-71.167) Neumayer Neumayer Station Søråsen ENVELOPE(-9.667,-9.667,-71.500,-71.500) Journal of Glaciology 56 198 673 687 |
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Open Polar |
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BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
description |
Four firn cores were retrieved in 2007 at two ridges in the area of the Ekström Ice Shelf, Dronning Maud Land, coastal East Antarctica, in order to investigate the recent regional climate variability and the potential for future extraction of an intermediate-depth core. Stable water-isotope analysis, tritium content and electrical conductivity were used to date the cores. For the period 1981–2006 a strong and significant correlation between the stable-isotope composition of firn cores in the hinterland and mean monthly air temperatures at Neumayer station was (r = 0.54−0.71). No atmospheric warming or cooling trend is inferred from our stable-isotope data for the period 1962–2006. The stable-isotope record of the ice/firn cores could expand well beyond the meteorological record of the region. No significant temporal variation of accumulation rates was detected. However, decreasing accumulation rates were found from coast to hinterland, as well as from east (Halvfarryggen) to west (Søråsen). The deuterium excess (d) exhibits similar differences (higher d at Søråsen, lower d at Halvfarryggen), with a weak negative temporal trend on Halvfarryggen (0.04‰ a−1), probably implying increasing oceanic input. We conclude that Halvfarryggen acts as a natural barrier for moisture-carrying air masses circulating in the region from east to west. |
format |
Article in Journal/Newspaper |
author |
Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob |
spellingShingle |
Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica |
author_facet |
Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob |
author_sort |
Fernandoy, Francisco |
title |
Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica |
title_short |
Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica |
title_full |
Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica |
title_fullStr |
Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica |
title_full_unstemmed |
Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica |
title_sort |
temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of neumayer station, east antarctica |
publisher |
International Glaciological Society |
publishDate |
2010 |
url |
https://boris.unibe.ch/4626/1/temporal-and-spatial-variation-of-stable-isotope-ratios-and-accumulation-rates-in-the-hinterland-of-neumayer-station-east-antarctica.pdf https://boris.unibe.ch/4626/ |
long_lat |
ENVELOPE(-8.000,-8.000,-71.000,-71.000) ENVELOPE(-6.500,-6.500,-71.167,-71.167) ENVELOPE(-9.667,-9.667,-71.500,-71.500) |
geographic |
Dronning Maud Land East Antarctica Ekström Ice Shelf Halvfarryggen Neumayer Neumayer Station Søråsen |
geographic_facet |
Dronning Maud Land East Antarctica Ekström Ice Shelf Halvfarryggen Neumayer Neumayer Station Søråsen |
genre |
Antarc* Antarctica Antarctica Journal Dronning Maud Land East Antarctica Ice Shelf Journal of Glaciology |
genre_facet |
Antarc* Antarctica Antarctica Journal Dronning Maud Land East Antarctica Ice Shelf Journal of Glaciology |
op_source |
Fernandoy, Francisco; Meyer, Hanno; Oerter, Hans; Wilhelms, Frank; Graf, Wolfgang; Schwander, Jakob (2010). Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica. Journal of glaciology, 56(198), pp. 673-687. Cambridge: International Glaciological Society 10.3189/002214310793146296 <http://dx.doi.org/10.3189/002214310793146296> |
op_relation |
https://boris.unibe.ch/4626/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3189/002214310793146296 |
container_title |
Journal of Glaciology |
container_volume |
56 |
container_issue |
198 |
container_start_page |
673 |
op_container_end_page |
687 |
_version_ |
1774724684204474368 |