Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records
We investigate and quantify the variability of snow accumulation rate around a medium-depth firn core (1160 m) drilled in east Dronning Maud Land, Antarctica (75 degrees 00'S, 15 degrees 00'E; 3470 m h.a.e. (ellipsoidal height)). We present accumulation data from five snow pits and five sh...
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2005
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ftunigroningenpu:oai:pure.rug.nl:publications/e731b3c3-b04a-45ef-bd9a-497759978d53 2024-06-23T07:47:13+00:00 Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records Karlof, Lars Isaksson, Elisabeth Winther, Jan-Gunnar Gundestrup, Niels Meijer, Harro A. J. Mulvaney, Robert Pourchet, Michel Hofstede, Coen Lappegard, Gaute Pettersson, Rickard Van den Broeke, Michiel Van De Wal, Roderik S. W. 2005 https://hdl.handle.net/11370/e731b3c3-b04a-45ef-bd9a-497759978d53 https://research.rug.nl/en/publications/e731b3c3-b04a-45ef-bd9a-497759978d53 eng eng https://research.rug.nl/en/publications/e731b3c3-b04a-45ef-bd9a-497759978d53 info:eu-repo/semantics/restrictedAccess Karlof , L , Isaksson , E , Winther , J-G , Gundestrup , N , Meijer , H A J , Mulvaney , R , Pourchet , M , Hofstede , C , Lappegard , G , Pettersson , R , Van den Broeke , M & Van De Wal , R S W 2005 , ' Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits : some implications for ice-core records ' , Journal of Glaciology , vol. 51 , no. 174 , pp. 343-352 . POLAR ICE SPATIAL VARIABILITY KATABATIC WINDS BOUNDARY-LAYER DRILL SITES SOUTH-POLE CHEMISTRY AEROSOL AMUNDSENISEN DEPTHS article 2005 ftunigroningenpu 2024-06-03T16:04:18Z We investigate and quantify the variability of snow accumulation rate around a medium-depth firn core (1160 m) drilled in east Dronning Maud Land, Antarctica (75 degrees 00'S, 15 degrees 00'E; 3470 m h.a.e. (ellipsoidal height)). We present accumulation data from five snow pits and five shallow (20 m) firn cores distributed within a 3.5-7 km distance, retrieved during the 2000/01 Nordic EPICA (European Project for Ice Coring in Antarctica) traverse. Snow accumulation rates estimated for shorter periods show higher spatial variance than for longer periods. Accumulation variability as recorded from the firn cores and snow pits cannot explain all the variation in the ion and isotope time series; other depositional and post-depositional processes need to be accounted for. Through simple statistical analysis we show that there are differences in sensitivity to these processes between the analyzed species. Oxygen isotopes and sulphate are more conservative in their post-depositional behaviour than the more volatile acids, such as nitrate and to some degree chloride and methanesulphonic acid. We discuss the possible causes for the accumulation variability and the implications for the interpretation of ice-core records. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land EPICA ice core Journal of Glaciology South pole South pole University of Groningen research database Amundsenisen ENVELOPE(-6.000,-6.000,-74.500,-74.500) Dronning Maud Land South Pole |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
POLAR ICE SPATIAL VARIABILITY KATABATIC WINDS BOUNDARY-LAYER DRILL SITES SOUTH-POLE CHEMISTRY AEROSOL AMUNDSENISEN DEPTHS |
spellingShingle |
POLAR ICE SPATIAL VARIABILITY KATABATIC WINDS BOUNDARY-LAYER DRILL SITES SOUTH-POLE CHEMISTRY AEROSOL AMUNDSENISEN DEPTHS Karlof, Lars Isaksson, Elisabeth Winther, Jan-Gunnar Gundestrup, Niels Meijer, Harro A. J. Mulvaney, Robert Pourchet, Michel Hofstede, Coen Lappegard, Gaute Pettersson, Rickard Van den Broeke, Michiel Van De Wal, Roderik S. W. Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
topic_facet |
POLAR ICE SPATIAL VARIABILITY KATABATIC WINDS BOUNDARY-LAYER DRILL SITES SOUTH-POLE CHEMISTRY AEROSOL AMUNDSENISEN DEPTHS |
description |
We investigate and quantify the variability of snow accumulation rate around a medium-depth firn core (1160 m) drilled in east Dronning Maud Land, Antarctica (75 degrees 00'S, 15 degrees 00'E; 3470 m h.a.e. (ellipsoidal height)). We present accumulation data from five snow pits and five shallow (20 m) firn cores distributed within a 3.5-7 km distance, retrieved during the 2000/01 Nordic EPICA (European Project for Ice Coring in Antarctica) traverse. Snow accumulation rates estimated for shorter periods show higher spatial variance than for longer periods. Accumulation variability as recorded from the firn cores and snow pits cannot explain all the variation in the ion and isotope time series; other depositional and post-depositional processes need to be accounted for. Through simple statistical analysis we show that there are differences in sensitivity to these processes between the analyzed species. Oxygen isotopes and sulphate are more conservative in their post-depositional behaviour than the more volatile acids, such as nitrate and to some degree chloride and methanesulphonic acid. We discuss the possible causes for the accumulation variability and the implications for the interpretation of ice-core records. |
format |
Article in Journal/Newspaper |
author |
Karlof, Lars Isaksson, Elisabeth Winther, Jan-Gunnar Gundestrup, Niels Meijer, Harro A. J. Mulvaney, Robert Pourchet, Michel Hofstede, Coen Lappegard, Gaute Pettersson, Rickard Van den Broeke, Michiel Van De Wal, Roderik S. W. |
author_facet |
Karlof, Lars Isaksson, Elisabeth Winther, Jan-Gunnar Gundestrup, Niels Meijer, Harro A. J. Mulvaney, Robert Pourchet, Michel Hofstede, Coen Lappegard, Gaute Pettersson, Rickard Van den Broeke, Michiel Van De Wal, Roderik S. W. |
author_sort |
Karlof, Lars |
title |
Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
title_short |
Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
title_full |
Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
title_fullStr |
Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
title_full_unstemmed |
Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
title_sort |
accumulation variability over a small area in east dronning maud land, antarctica, as determined from shallow firn cores and snow pits:some implications for ice-core records |
publishDate |
2005 |
url |
https://hdl.handle.net/11370/e731b3c3-b04a-45ef-bd9a-497759978d53 https://research.rug.nl/en/publications/e731b3c3-b04a-45ef-bd9a-497759978d53 |
long_lat |
ENVELOPE(-6.000,-6.000,-74.500,-74.500) |
geographic |
Amundsenisen Dronning Maud Land South Pole |
geographic_facet |
Amundsenisen Dronning Maud Land South Pole |
genre |
Antarc* Antarctica Dronning Maud Land EPICA ice core Journal of Glaciology South pole South pole |
genre_facet |
Antarc* Antarctica Dronning Maud Land EPICA ice core Journal of Glaciology South pole South pole |
op_source |
Karlof , L , Isaksson , E , Winther , J-G , Gundestrup , N , Meijer , H A J , Mulvaney , R , Pourchet , M , Hofstede , C , Lappegard , G , Pettersson , R , Van den Broeke , M & Van De Wal , R S W 2005 , ' Accumulation variability over a small area in east Dronning Maud Land, Antarctica, as determined from shallow firn cores and snow pits : some implications for ice-core records ' , Journal of Glaciology , vol. 51 , no. 174 , pp. 343-352 . |
op_relation |
https://research.rug.nl/en/publications/e731b3c3-b04a-45ef-bd9a-497759978d53 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1802651307744428032 |