Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica
Spatio-temporal variations of the recently determined accumulation rate are investigated using ground-penetrating radar (GPR) measurements and firn-core studies. The study area is located on Ritscherflya in western Dronning Maud Land, Antarctica, at an elevation range 1400-1560 m. Accumulation rates...
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ftawi:oai:epic.awi.de:16263 2024-09-15T17:41:11+00:00 Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica Anschütz, H. Steinhage, Daniel Eisen, Olaf Oerter, Hans Horwarth, M. Ruth, Urs 2008 https://epic.awi.de/id/eprint/16263/ https://hdl.handle.net/10013/epic.30842 unknown Anschütz, H. , Steinhage, D. orcid:0000-0003-4737-9751 , Eisen, O. orcid:0000-0002-6380-962X , Oerter, H. , Horwarth, M. and Ruth, U. (2008) Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica , Journal of Glaciology Vol. 54, no. 185, pp. 315-323 . hdl:10013/epic.30842 EPIC3Journal of Glaciology Vol. 54, no. 185, pp. 315-323 Article isiRev 2008 ftawi 2024-06-24T03:59:21Z Spatio-temporal variations of the recently determined accumulation rate are investigated using ground-penetrating radar (GPR) measurements and firn-core studies. The study area is located on Ritscherflya in western Dronning Maud Land, Antarctica, at an elevation range 1400-1560 m. Accumulation rates are derived from internal reflection horizons (IRHs), tracked with GPR, which are connected to a dated firn core. GPR-derived internal layer depths show small relief along a 22 km profile on an ice flowline. Average accumulation rates are about 190 kg m−2 a−1 (1980-2005) with spatial variability (1σ) of 5% along the GPR profile. The interannual variability obtained from four dated firn cores is one order of magnitude higher, showing 1σ standard deviations around 30%. Mean temporal variations of GPR-derived accumulation rates are of the same magnitude or even higher than spatial variations. Temporal differences between 1980-90 and 1990-2005, obtained from two dated IRHs along the GPR profile, indicate temporally non-stationary processes, linked to spatial variations. Comparison with similarly obtained accumulation data from another coastal area in central Dronning Maud Land confirms this observation. Our results contribute to understanding spatio-temporal variations of the accumulation processes, necessary for the validation of satellite data (e.g. altimetry studies and gravity missions such as Gravity Recovery and Climate Experiment (GRACE)). Article in Journal/Newspaper Antarc* Antarctica Antarctica Journal Dronning Maud Land Journal of Glaciology Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
Spatio-temporal variations of the recently determined accumulation rate are investigated using ground-penetrating radar (GPR) measurements and firn-core studies. The study area is located on Ritscherflya in western Dronning Maud Land, Antarctica, at an elevation range 1400-1560 m. Accumulation rates are derived from internal reflection horizons (IRHs), tracked with GPR, which are connected to a dated firn core. GPR-derived internal layer depths show small relief along a 22 km profile on an ice flowline. Average accumulation rates are about 190 kg m−2 a−1 (1980-2005) with spatial variability (1σ) of 5% along the GPR profile. The interannual variability obtained from four dated firn cores is one order of magnitude higher, showing 1σ standard deviations around 30%. Mean temporal variations of GPR-derived accumulation rates are of the same magnitude or even higher than spatial variations. Temporal differences between 1980-90 and 1990-2005, obtained from two dated IRHs along the GPR profile, indicate temporally non-stationary processes, linked to spatial variations. Comparison with similarly obtained accumulation data from another coastal area in central Dronning Maud Land confirms this observation. Our results contribute to understanding spatio-temporal variations of the accumulation processes, necessary for the validation of satellite data (e.g. altimetry studies and gravity missions such as Gravity Recovery and Climate Experiment (GRACE)). |
format |
Article in Journal/Newspaper |
author |
Anschütz, H. Steinhage, Daniel Eisen, Olaf Oerter, Hans Horwarth, M. Ruth, Urs |
spellingShingle |
Anschütz, H. Steinhage, Daniel Eisen, Olaf Oerter, Hans Horwarth, M. Ruth, Urs Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica |
author_facet |
Anschütz, H. Steinhage, Daniel Eisen, Olaf Oerter, Hans Horwarth, M. Ruth, Urs |
author_sort |
Anschütz, H. |
title |
Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica |
title_short |
Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica |
title_full |
Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica |
title_fullStr |
Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica |
title_full_unstemmed |
Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica |
title_sort |
small-scale spatio-temporal characteristics of accumulation rates in western dronning maud land, antarctica |
publishDate |
2008 |
url |
https://epic.awi.de/id/eprint/16263/ https://hdl.handle.net/10013/epic.30842 |
genre |
Antarc* Antarctica Antarctica Journal Dronning Maud Land Journal of Glaciology |
genre_facet |
Antarc* Antarctica Antarctica Journal Dronning Maud Land Journal of Glaciology |
op_source |
EPIC3Journal of Glaciology Vol. 54, no. 185, pp. 315-323 |
op_relation |
Anschütz, H. , Steinhage, D. orcid:0000-0003-4737-9751 , Eisen, O. orcid:0000-0002-6380-962X , Oerter, H. , Horwarth, M. and Ruth, U. (2008) Small-scale spatio-temporal characteristics of accumulation rates in western Dronning Maud Land, Antarctica , Journal of Glaciology Vol. 54, no. 185, pp. 315-323 . hdl:10013/epic.30842 |
_version_ |
1810487318713204736 |