Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, 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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Language: | English |
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PANGAEA
2010
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.753185 https://doi.org/10.1594/PANGAEA.753185 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.753185 |
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openpolar |
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Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XIX/2 AWI_Glac B38 B39 DML641C02_01 DML651C02_03 DML94C07_38 DML95C07_01 DML95C07_02 DML95C07_03 DML96C07_39 DML97C07_04 Dronning Maud Land Antarctica EPICA European Project for Ice Coring in Antarctica FB0201 FB0202 FB0203 FB0701 FB0702 FB0703 FB0704 FIRN Firn auger Georg von Neumayer Glaciology @ AWI GVN ICEDRILL Ice drill Monitoring station MONS NM02C02_02 Polarstern Pre-IPICS PS61 Sampling/drilling ice |
spellingShingle |
ANT-XIX/2 AWI_Glac B38 B39 DML641C02_01 DML651C02_03 DML94C07_38 DML95C07_01 DML95C07_02 DML95C07_03 DML96C07_39 DML97C07_04 Dronning Maud Land Antarctica EPICA European Project for Ice Coring in Antarctica FB0201 FB0202 FB0203 FB0701 FB0702 FB0703 FB0704 FIRN Firn auger Georg von Neumayer Glaciology @ AWI GVN ICEDRILL Ice drill Monitoring station MONS NM02C02_02 Polarstern Pre-IPICS PS61 Sampling/drilling ice Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica |
topic_facet |
ANT-XIX/2 AWI_Glac B38 B39 DML641C02_01 DML651C02_03 DML94C07_38 DML95C07_01 DML95C07_02 DML95C07_03 DML96C07_39 DML97C07_04 Dronning Maud Land Antarctica EPICA European Project for Ice Coring in Antarctica FB0201 FB0202 FB0203 FB0701 FB0702 FB0703 FB0704 FIRN Firn auger Georg von Neumayer Glaciology @ AWI GVN ICEDRILL Ice drill Monitoring station MONS NM02C02_02 Polarstern Pre-IPICS PS61 Sampling/drilling ice |
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 per mil/a), 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 |
Dataset |
author |
Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob |
author_facet |
Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob |
author_sort |
Fernandoy, Francisco |
title |
Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica |
title_short |
Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica |
title_full |
Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica |
title_fullStr |
Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica |
title_full_unstemmed |
Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica |
title_sort |
stable-isotope ratios and accumulation rates of four firn cores from the dronning maud land, antarctica |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.753185 https://doi.org/10.1594/PANGAEA.753185 |
op_coverage |
MEDIAN LATITUDE: -71.414736 * MEDIAN LONGITUDE: -8.293342 * SOUTH-BOUND LATITUDE: -72.064000 * WEST-BOUND LONGITUDE: -9.916700 * NORTH-BOUND LATITUDE: -70.650000 * EAST-BOUND LONGITUDE: -6.667000 * DATE/TIME START: 1981-01-15T00:00:00 * DATE/TIME END: 2007-02-01T23:59:00 |
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) ENVELOPE(-9.916700,-6.667000,-70.650000,-72.064000) |
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 EPICA Ice Shelf Journal of Glaciology |
genre_facet |
Antarc* Antarctica Antarctica Journal Dronning Maud Land East Antarctica EPICA Ice Shelf Journal of Glaciology |
op_source |
Supplement to: 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), 673-687, https://doi.org/10.3189/002214310793146296 |
op_relation |
Fernandoy, Francisco; Oerter, Hans; Meyer, Hanno (2008): Spatial variability in isotope signatures of precipitation around Neumayer station, East Antarctica. SCAR-IASC Open Science Conference, St. Petersburg, Russia, 8-11 July 2008, hdl:10013/epic.30800.d001 Oerter, Hans; Fernandoy, Francisco; Meyer, Hanno; Wilhelms, Frank; Graf, Wolfgang; Stichler, Willibald (2008): Accumulation and stable-isotope content in the hinterland of Neumayer station, Antarctica, since the IPY 1957/58. SCAR-IASC Open Science Conference, St. Petersburg, Russia, 8-11 July 2008, hdl:10013/epic.30805.d001 https://doi.pangaea.de/10.1594/PANGAEA.753185 https://doi.org/10.1594/PANGAEA.753185 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.753185 https://doi.org/10.3189/002214310793146296 |
_version_ |
1766163888690167808 |
spelling |
ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.753185 2023-05-15T13:42:10+02:00 Stable-isotope ratios and accumulation rates of four firn cores from the Dronning Maud Land, Antarctica Fernandoy, Francisco Meyer, Hanno Oerter, Hans Wilhelms, Frank Graf, Wolfgang Schwander, Jakob MEDIAN LATITUDE: -71.414736 * MEDIAN LONGITUDE: -8.293342 * SOUTH-BOUND LATITUDE: -72.064000 * WEST-BOUND LONGITUDE: -9.916700 * NORTH-BOUND LATITUDE: -70.650000 * EAST-BOUND LONGITUDE: -6.667000 * DATE/TIME START: 1981-01-15T00:00:00 * DATE/TIME END: 2007-02-01T23:59:00 2010-11-05 application/zip, 32 datasets https://doi.pangaea.de/10.1594/PANGAEA.753185 https://doi.org/10.1594/PANGAEA.753185 en eng PANGAEA Fernandoy, Francisco; Oerter, Hans; Meyer, Hanno (2008): Spatial variability in isotope signatures of precipitation around Neumayer station, East Antarctica. SCAR-IASC Open Science Conference, St. Petersburg, Russia, 8-11 July 2008, hdl:10013/epic.30800.d001 Oerter, Hans; Fernandoy, Francisco; Meyer, Hanno; Wilhelms, Frank; Graf, Wolfgang; Stichler, Willibald (2008): Accumulation and stable-isotope content in the hinterland of Neumayer station, Antarctica, since the IPY 1957/58. SCAR-IASC Open Science Conference, St. Petersburg, Russia, 8-11 July 2008, hdl:10013/epic.30805.d001 https://doi.pangaea.de/10.1594/PANGAEA.753185 https://doi.org/10.1594/PANGAEA.753185 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: 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), 673-687, https://doi.org/10.3189/002214310793146296 ANT-XIX/2 AWI_Glac B38 B39 DML641C02_01 DML651C02_03 DML94C07_38 DML95C07_01 DML95C07_02 DML95C07_03 DML96C07_39 DML97C07_04 Dronning Maud Land Antarctica EPICA European Project for Ice Coring in Antarctica FB0201 FB0202 FB0203 FB0701 FB0702 FB0703 FB0704 FIRN Firn auger Georg von Neumayer Glaciology @ AWI GVN ICEDRILL Ice drill Monitoring station MONS NM02C02_02 Polarstern Pre-IPICS PS61 Sampling/drilling ice Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.753185 https://doi.org/10.3189/002214310793146296 2023-01-20T07:31:57Z 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 per mil/a), 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. Dataset Antarc* Antarctica Antarctica Journal Dronning Maud Land East Antarctica EPICA Ice Shelf Journal of Glaciology PANGAEA - Data Publisher for Earth & Environmental Science 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) ENVELOPE(-9.916700,-6.667000,-70.650000,-72.064000) |