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 Ekstrom 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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fthzmuenchen:oai:opus-zb.helmholtz-muenchen.de:6010 2023-05-15T13:52:04+02:00 Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica. Fernandoy, F. Meyer, H. Oerter, H. Wilhelms, F. Graf, W. Schwander, J. 2010-01-01 application/pdf https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=6010 eng eng Nt. Glaciol. Soc. info:eu-repo/semantics/altIdentifier/wos/undefined info:eu-repo/semantics/altIdentifier/isbn/0022-1430 info:eu-repo/semantics/altIdentifier/pissn/0022-1430 info:eu-repo/semantics/altIdentifier/eissn/1727-5652 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=6010 urn:isbn:0022-1430 urn:issn:0022-1430 urn:issn:1727-5652 info:eu-repo/semantics/openAccess J. Glaciol. 56, 673-687 (2010) DRONNING-MAUD-LAND WEDDELL POLYNYA FIRN CORES ICE-SHEET ATMOSPHERIC CIRCULATION CLIMATE VARIABILITY MASS-BALANCE PRECIPITATION SNOW SURFACE Text info:eu-repo/semantics/article 2010 fthzmuenchen 2022-11-20T08:53:48Z Four firn cores were retrieved in 2007 at two ridges in the area of the Ekstrom 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 (Sorasen). The deuterium excess (d) exhibits similar differences (higher d at Sorasen, lower d at Halvfarryggen), with a weak negative temporal trend on Halvfarryggen (0.04 parts per thousand 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 Dronning Maud Land East Antarctica Ekstrom Ice Shelf Ice Sheet Ice Shelf PuSH - Publikationsserver des Helmholtz Zentrums München Dronning Maud Land East Antarctica Halvfarryggen ENVELOPE(-6.500,-6.500,-71.167,-71.167) Neumayer Neumayer Station Sorasen ENVELOPE(-9.667,-9.667,-71.500,-71.500) Weddell |
institution |
Open Polar |
collection |
PuSH - Publikationsserver des Helmholtz Zentrums München |
op_collection_id |
fthzmuenchen |
language |
English |
topic |
DRONNING-MAUD-LAND WEDDELL POLYNYA FIRN CORES ICE-SHEET ATMOSPHERIC CIRCULATION CLIMATE VARIABILITY MASS-BALANCE PRECIPITATION SNOW SURFACE |
spellingShingle |
DRONNING-MAUD-LAND WEDDELL POLYNYA FIRN CORES ICE-SHEET ATMOSPHERIC CIRCULATION CLIMATE VARIABILITY MASS-BALANCE PRECIPITATION SNOW SURFACE Fernandoy, F. Meyer, H. Oerter, H. Wilhelms, F. Graf, W. Schwander, J. Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica. |
topic_facet |
DRONNING-MAUD-LAND WEDDELL POLYNYA FIRN CORES ICE-SHEET ATMOSPHERIC CIRCULATION CLIMATE VARIABILITY MASS-BALANCE PRECIPITATION SNOW SURFACE |
description |
Four firn cores were retrieved in 2007 at two ridges in the area of the Ekstrom 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 (Sorasen). The deuterium excess (d) exhibits similar differences (higher d at Sorasen, lower d at Halvfarryggen), with a weak negative temporal trend on Halvfarryggen (0.04 parts per thousand 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, F. Meyer, H. Oerter, H. Wilhelms, F. Graf, W. Schwander, J. |
author_facet |
Fernandoy, F. Meyer, H. Oerter, H. Wilhelms, F. Graf, W. Schwander, J. |
author_sort |
Fernandoy, F. |
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 |
Nt. Glaciol. Soc. |
publishDate |
2010 |
url |
https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=6010 |
long_lat |
ENVELOPE(-6.500,-6.500,-71.167,-71.167) ENVELOPE(-9.667,-9.667,-71.500,-71.500) |
geographic |
Dronning Maud Land East Antarctica Halvfarryggen Neumayer Neumayer Station Sorasen Weddell |
geographic_facet |
Dronning Maud Land East Antarctica Halvfarryggen Neumayer Neumayer Station Sorasen Weddell |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica Ekstrom Ice Shelf Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica Ekstrom Ice Shelf Ice Sheet Ice Shelf |
op_source |
J. Glaciol. 56, 673-687 (2010) |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/undefined info:eu-repo/semantics/altIdentifier/isbn/0022-1430 info:eu-repo/semantics/altIdentifier/pissn/0022-1430 info:eu-repo/semantics/altIdentifier/eissn/1727-5652 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=6010 urn:isbn:0022-1430 urn:issn:0022-1430 urn:issn:1727-5652 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766256303470018560 |