A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation
The GLACIOCLIM-SAMBA (GS) Antarctic accumulation monitoring network, which extends from the coast of Adelie Land to the Antarctic plateau, has been surveyed annually since 2004. The network includes a 156-km stake-line from the coast inland, along which accumulation shows high spatial and interannua...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/231631 2023-11-12T03:59:33+01:00 A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation Agosta, C. Favier, V. Genthon, C. Gallée, H. Krinner, G. Lenaerts, J.T.M. van den Broeke, M.R. Marine and Atmospheric Research Dep Natuurkunde Sub Dynamics Meteorology 2011 application/pdf https://dspace.library.uu.nl/handle/1874/231631 en eng 0930-7575 https://dspace.library.uu.nl/handle/1874/231631 info:eu-repo/semantics/OpenAccess Article 2011 ftunivutrecht 2023-11-01T23:12:01Z The GLACIOCLIM-SAMBA (GS) Antarctic accumulation monitoring network, which extends from the coast of Adelie Land to the Antarctic plateau, has been surveyed annually since 2004. The network includes a 156-km stake-line from the coast inland, along which accumulation shows high spatial and interannual variability with a mean value of 362 mm water equivalent a-1. In this paper, this accumulation is compared with older accumulation reports from between 1971 and 1991. The mean and annual standard deviation and the km-scale spatial pattern of accumulation were seen to be very similar in the older and more recent data. The data did not reveal any significant accumulation trend over the last 40 years. The ECMWF analysis-based forecasts (ERA-40 and ERAInterim), a stretched-grid global general circulation model (LMDZ4) and three regional circulation models (PMM5, MAR and RACMO2), all with high resolution over Antarctica (27–125 km), were tested against the GS reports. They qualitatively reproduced the meso-scale spatial pattern of the annual-mean accumulation except MAR. MAR significantly underestimated mean accumulation, while LMDZ4 and RACMO2 overestimated it. ERA-40 and the regional models that use ERA-40 as lateral boundary condition qualitatively reproduced the chronology of interannual variability but underestimated the magnitude of interannual variations. Two widely used climatologies for Antarctic accumulation agreed well with the mean GS data. The model-based climatology was also able to reproduce the observed spatial pattern. These data thus provide new stringent constraints on models and other large-scale evaluations of the Antarctic accumulation. Article in Journal/Newspaper Adelie Land Antarc* Antarctic Antarctica Utrecht University Repository Antarctic The Antarctic |
institution |
Open Polar |
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Utrecht University Repository |
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ftunivutrecht |
language |
English |
description |
The GLACIOCLIM-SAMBA (GS) Antarctic accumulation monitoring network, which extends from the coast of Adelie Land to the Antarctic plateau, has been surveyed annually since 2004. The network includes a 156-km stake-line from the coast inland, along which accumulation shows high spatial and interannual variability with a mean value of 362 mm water equivalent a-1. In this paper, this accumulation is compared with older accumulation reports from between 1971 and 1991. The mean and annual standard deviation and the km-scale spatial pattern of accumulation were seen to be very similar in the older and more recent data. The data did not reveal any significant accumulation trend over the last 40 years. The ECMWF analysis-based forecasts (ERA-40 and ERAInterim), a stretched-grid global general circulation model (LMDZ4) and three regional circulation models (PMM5, MAR and RACMO2), all with high resolution over Antarctica (27–125 km), were tested against the GS reports. They qualitatively reproduced the meso-scale spatial pattern of the annual-mean accumulation except MAR. MAR significantly underestimated mean accumulation, while LMDZ4 and RACMO2 overestimated it. ERA-40 and the regional models that use ERA-40 as lateral boundary condition qualitatively reproduced the chronology of interannual variability but underestimated the magnitude of interannual variations. Two widely used climatologies for Antarctic accumulation agreed well with the mean GS data. The model-based climatology was also able to reproduce the observed spatial pattern. These data thus provide new stringent constraints on models and other large-scale evaluations of the Antarctic accumulation. |
author2 |
Marine and Atmospheric Research Dep Natuurkunde Sub Dynamics Meteorology |
format |
Article in Journal/Newspaper |
author |
Agosta, C. Favier, V. Genthon, C. Gallée, H. Krinner, G. Lenaerts, J.T.M. van den Broeke, M.R. |
spellingShingle |
Agosta, C. Favier, V. Genthon, C. Gallée, H. Krinner, G. Lenaerts, J.T.M. van den Broeke, M.R. A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation |
author_facet |
Agosta, C. Favier, V. Genthon, C. Gallée, H. Krinner, G. Lenaerts, J.T.M. van den Broeke, M.R. |
author_sort |
Agosta, C. |
title |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation |
title_short |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation |
title_full |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation |
title_fullStr |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation |
title_full_unstemmed |
A 40-year accumulation dataset for Adelie Land, Antarctica and its application for model validation |
title_sort |
40-year accumulation dataset for adelie land, antarctica and its application for model validation |
publishDate |
2011 |
url |
https://dspace.library.uu.nl/handle/1874/231631 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Adelie Land Antarc* Antarctic Antarctica |
genre_facet |
Adelie Land Antarc* Antarctic Antarctica |
op_relation |
0930-7575 https://dspace.library.uu.nl/handle/1874/231631 |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1782331426857811968 |