Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica

Francisco Fernandoy, Hanno Meyer, Hans Oerter, Frank Wilhelms, Wolfgang Graf, Jakob Schwander

Resultado de la investigación: Article

27 Citas (Scopus)

Resumen

Four firn cores were retrieved in 2007 at two ridges in the area of the Ekstrcim 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.

Idioma originalEnglish
Páginas (desde-hasta)673-687
Número de páginas15
PublicaciónJournal of Glaciology
Volumen56
N.º198
DOI
EstadoPublished - oct 2010

Huella dactilar

firn
accumulation rate
stable isotope
temporal variation
spatial variation
natural barrier
ice shelf
tritium
deuterium
regional climate
air mass
electrical conductivity
air temperature
warming
moisture
isotope
cooling
ice
coast
station

ASJC Scopus subject areas

  • Earth-Surface Processes

Citar esto

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. En: Journal of Glaciology. 2010 ; Vol. 56, N.º 198. pp. 673-687.
@article{28c45cd021df44cfb676e8f6e713eb9a,
title = "Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica",
abstract = "Four firn cores were retrieved in 2007 at two ridges in the area of the Ekstrcim 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 (S{\o}r{\aa}sen). The deuterium excess (d) exhibits similar differences (higher d at S{\o}r{\aa}sen, 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.",
author = "Francisco Fernandoy and Hanno Meyer and Hans Oerter and Frank Wilhelms and Wolfgang Graf and Jakob Schwander",
year = "2010",
month = "10",
doi = "10.3189/002214310793146296",
language = "English",
volume = "56",
pages = "673--687",
journal = "Journal of Glaciology",
issn = "0022-1430",
publisher = "International Glaciology Society",
number = "198",

}

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.

En: Journal of Glaciology, Vol. 56, N.º 198, 10.2010, p. 673-687.

Resultado de la investigación: Article

TY - JOUR

T1 - Temporal and spatial variation of stable-isotope ratios and accumulation rates in the hinterland of Neumayer station, East Antarctica

AU - Fernandoy, Francisco

AU - Meyer, Hanno

AU - Oerter, Hans

AU - Wilhelms, Frank

AU - Graf, Wolfgang

AU - Schwander, Jakob

PY - 2010/10

Y1 - 2010/10

N2 - Four firn cores were retrieved in 2007 at two ridges in the area of the Ekstrcim 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.

AB - Four firn cores were retrieved in 2007 at two ridges in the area of the Ekstrcim 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.

UR - http://www.scopus.com/inward/record.url?scp=78149249374&partnerID=8YFLogxK

U2 - 10.3189/002214310793146296

DO - 10.3189/002214310793146296

M3 - Article

AN - SCOPUS:78149249374

VL - 56

SP - 673

EP - 687

JO - Journal of Glaciology

JF - Journal of Glaciology

SN - 0022-1430

IS - 198

ER -