Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica
We used internal ice layers from a radio-echo sounding profile between the Kohnen and Dome Fuji deep drilling sites to infer the spatio-temporal pattern of accumulation rate in this sector of Dronning Maud Land, East Antarctica. Continuous internal reflection horizons can be traced to about half of...
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ftawi:oai:epic.awi.de:19890 2024-09-15T17:39:59+00:00 Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica Huybrechts, Philippe Rybak, Oleg Pattyn, F. Steinhage, Daniel 2009 application/pdf https://epic.awi.de/id/eprint/19890/ https://epic.awi.de/id/eprint/19890/1/Huy2009b.pdf https://hdl.handle.net/10013/epic.32956 https://hdl.handle.net/10013/epic.32956.d001 unknown https://epic.awi.de/id/eprint/19890/1/Huy2009b.pdf https://hdl.handle.net/10013/epic.32956.d001 Huybrechts, P. , Rybak, O. , Pattyn, F. and Steinhage, D. orcid:0000-0003-4737-9751 (2009) Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica , Annals of Glaciology, 50 (51), pp. 112-120 . hdl:10013/epic.32956 EPIC3Annals of Glaciology, 50(51), pp. 112-120 Article peerRev 2009 ftawi 2024-06-24T04:01:09Z We used internal ice layers from a radio-echo sounding profile between the Kohnen and Dome Fuji deep drilling sites to infer the spatio-temporal pattern of accumulation rate in this sector of Dronning Maud Land, East Antarctica. Continuous internal reflection horizons can be traced to about half of the ice thickness and have a maximum age of approximately 72.7 ka BP. To infer palaeoaccumulation rates from the dated layers, we derived the thinning functions from a flow calculation with a high-resolution higher-order model of Dronning Maud Land embedded into a three-dimensional thermomechanical model of the Antarctic ice sheet. The method takes into account complex ice-flow dynamics and advection effects that cannot be dealt with using traditional local approaches. We selected seven time intervals over which we determine the average accumulation rate and average surface temperature at the place and time of origin of the layer particles. Our results show lower accumulation rates along eastern parts of the profile for the late Holocene (05 ka BP) than are shown by existing maps, which had no surface control points. During the last glacial period we find a substantially lower accumulation rate than predicted by the usual approach linking palaeo-accumulation rates to the condensation temperature above the surface inversion layer. These findings were used to fine-tune the relation between accumulation rate and temperature. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
We used internal ice layers from a radio-echo sounding profile between the Kohnen and Dome Fuji deep drilling sites to infer the spatio-temporal pattern of accumulation rate in this sector of Dronning Maud Land, East Antarctica. Continuous internal reflection horizons can be traced to about half of the ice thickness and have a maximum age of approximately 72.7 ka BP. To infer palaeoaccumulation rates from the dated layers, we derived the thinning functions from a flow calculation with a high-resolution higher-order model of Dronning Maud Land embedded into a three-dimensional thermomechanical model of the Antarctic ice sheet. The method takes into account complex ice-flow dynamics and advection effects that cannot be dealt with using traditional local approaches. We selected seven time intervals over which we determine the average accumulation rate and average surface temperature at the place and time of origin of the layer particles. Our results show lower accumulation rates along eastern parts of the profile for the late Holocene (05 ka BP) than are shown by existing maps, which had no surface control points. During the last glacial period we find a substantially lower accumulation rate than predicted by the usual approach linking palaeo-accumulation rates to the condensation temperature above the surface inversion layer. These findings were used to fine-tune the relation between accumulation rate and temperature. |
format |
Article in Journal/Newspaper |
author |
Huybrechts, Philippe Rybak, Oleg Pattyn, F. Steinhage, Daniel |
spellingShingle |
Huybrechts, Philippe Rybak, Oleg Pattyn, F. Steinhage, Daniel Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica |
author_facet |
Huybrechts, Philippe Rybak, Oleg Pattyn, F. Steinhage, Daniel |
author_sort |
Huybrechts, Philippe |
title |
Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica |
title_short |
Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica |
title_full |
Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica |
title_fullStr |
Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica |
title_full_unstemmed |
Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica |
title_sort |
past and present accumulation rate reconstruction along the dome fuji-kohnen radio echo sounding profile, dronning maud land, east antarctica |
publishDate |
2009 |
url |
https://epic.awi.de/id/eprint/19890/ https://epic.awi.de/id/eprint/19890/1/Huy2009b.pdf https://hdl.handle.net/10013/epic.32956 https://hdl.handle.net/10013/epic.32956.d001 |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica Ice Sheet |
op_source |
EPIC3Annals of Glaciology, 50(51), pp. 112-120 |
op_relation |
https://epic.awi.de/id/eprint/19890/1/Huy2009b.pdf https://hdl.handle.net/10013/epic.32956.d001 Huybrechts, P. , Rybak, O. , Pattyn, F. and Steinhage, D. orcid:0000-0003-4737-9751 (2009) Past and present accumulation rate reconstruction along the Dome Fuji-Kohnen radio echo sounding profile, Dronning Maud Land, East Antarctica , Annals of Glaciology, 50 (51), pp. 112-120 . hdl:10013/epic.32956 |
_version_ |
1810483918848131072 |