Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates
For the first time, annually resolved accumulation rates have been determined in central Antarctica by means of counting seasonal signals of ammonium, calcium, and sodium. All records, obtained from three intermediate depth ice cores from Dronning Maud Land, East Antarctica, show rather constant acc...
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ftunivbern:oai:boris.unibe.ch:158734 2023-08-20T04:02:10+02:00 Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates Sommer, S. Appenzeller, C. Röthlisberger, R. Hutterli, M. A. Stauffer, B. Wagenbach, D. Oerter, H. Wilhelms, F. Miller, H. Mulvaney, R. 2000 application/pdf https://boris.unibe.ch/158734/1/sommer00jgr_a.pdf https://boris.unibe.ch/158734/ eng eng American Geophysical Union https://boris.unibe.ch/158734/ info:eu-repo/semantics/openAccess Sommer, S.; Appenzeller, C.; Röthlisberger, R.; Hutterli, M. A.; Stauffer, B.; Wagenbach, D.; Oerter, H.; Wilhelms, F.; Miller, H.; Mulvaney, R. (2000). Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates. Journal of Geophysical Research: Atmospheres, 105(D24), pp. 29411-29421. American Geophysical Union 10.1029/2000JD900449 <http://dx.doi.org/10.1029/2000JD900449> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2000 ftunivbern https://doi.org/10.1029/2000JD900449 2023-07-31T22:08:19Z For the first time, annually resolved accumulation rates have been determined in central Antarctica by means of counting seasonal signals of ammonium, calcium, and sodium. All records, obtained from three intermediate depth ice cores from Dronning Maud Land, East Antarctica, show rather constant accumulation rates throughout the last 9 centuries with mean values of 63, 61, and 44 mm H2O yr−1 and a typical year-to-year variation of about 30%. For the last few decades, no trend was detected accounting for the high natural variability of all records. A significant weak intersite correlation is apparent only between two cores when the high-frequency part with periods less than 30 years is removed. By analyzing the records in the frequency domain, no persistent periods were found. This suggests that the snow accumulation in this area is mainly influenced by local deposition patterns and may be additionally masked by redistribution of snow due to wind. By comparing accumulation rates over the last 2 millennia a distinct change in the layer thickness in one of the three cores was found, which might be attributed either to an area upstream of the drilling site with lower accumulation rates, or to deposition processes influenced by surface undulations. The missing of a clear correlation between the accumulation rate histories at the three locations is also important for the interpretation of small, short time variations of past precipitation records obtained from deep ice cores. Article in Journal/Newspaper Antarc* Antarctica Dronning Maud Land East Antarctica BORIS (Bern Open Repository and Information System, University of Bern) Dronning Maud Land East Antarctica Journal of Geophysical Research: Atmospheres 105 D24 29411 29421 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Sommer, S. Appenzeller, C. Röthlisberger, R. Hutterli, M. A. Stauffer, B. Wagenbach, D. Oerter, H. Wilhelms, F. Miller, H. Mulvaney, R. Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates |
topic_facet |
530 Physics |
description |
For the first time, annually resolved accumulation rates have been determined in central Antarctica by means of counting seasonal signals of ammonium, calcium, and sodium. All records, obtained from three intermediate depth ice cores from Dronning Maud Land, East Antarctica, show rather constant accumulation rates throughout the last 9 centuries with mean values of 63, 61, and 44 mm H2O yr−1 and a typical year-to-year variation of about 30%. For the last few decades, no trend was detected accounting for the high natural variability of all records. A significant weak intersite correlation is apparent only between two cores when the high-frequency part with periods less than 30 years is removed. By analyzing the records in the frequency domain, no persistent periods were found. This suggests that the snow accumulation in this area is mainly influenced by local deposition patterns and may be additionally masked by redistribution of snow due to wind. By comparing accumulation rates over the last 2 millennia a distinct change in the layer thickness in one of the three cores was found, which might be attributed either to an area upstream of the drilling site with lower accumulation rates, or to deposition processes influenced by surface undulations. The missing of a clear correlation between the accumulation rate histories at the three locations is also important for the interpretation of small, short time variations of past precipitation records obtained from deep ice cores. |
format |
Article in Journal/Newspaper |
author |
Sommer, S. Appenzeller, C. Röthlisberger, R. Hutterli, M. A. Stauffer, B. Wagenbach, D. Oerter, H. Wilhelms, F. Miller, H. Mulvaney, R. |
author_facet |
Sommer, S. Appenzeller, C. Röthlisberger, R. Hutterli, M. A. Stauffer, B. Wagenbach, D. Oerter, H. Wilhelms, F. Miller, H. Mulvaney, R. |
author_sort |
Sommer, S. |
title |
Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates |
title_short |
Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates |
title_full |
Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates |
title_fullStr |
Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates |
title_full_unstemmed |
Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates |
title_sort |
glacio-chemical study spanning the past 2 kyr on three ice cores from dronning maud land, antarctica: 1. annually resolved accumulation rates |
publisher |
American Geophysical Union |
publishDate |
2000 |
url |
https://boris.unibe.ch/158734/1/sommer00jgr_a.pdf https://boris.unibe.ch/158734/ |
geographic |
Dronning Maud Land East Antarctica |
geographic_facet |
Dronning Maud Land East Antarctica |
genre |
Antarc* Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica |
op_source |
Sommer, S.; Appenzeller, C.; Röthlisberger, R.; Hutterli, M. A.; Stauffer, B.; Wagenbach, D.; Oerter, H.; Wilhelms, F.; Miller, H.; Mulvaney, R. (2000). Glacio-chemical study spanning the past 2 kyr on three ice cores from Dronning Maud Land, Antarctica: 1. Annually resolved accumulation rates. Journal of Geophysical Research: Atmospheres, 105(D24), pp. 29411-29421. American Geophysical Union 10.1029/2000JD900449 <http://dx.doi.org/10.1029/2000JD900449> |
op_relation |
https://boris.unibe.ch/158734/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2000JD900449 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
105 |
container_issue |
D24 |
container_start_page |
29411 |
op_container_end_page |
29421 |
_version_ |
1774712541783523328 |