Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth
The aim of this case study is to quantify the seasonal variability in crystal properties, and to discuss the reason for the variability. A continuous 1.10 m long vertical thin section profile covering approximately five annual cycles has been obtained from the NorthGRIP ice core at around 301 m dept...
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ftawi:oai:epic.awi.de:7466 2023-09-05T13:12:04+02:00 Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth Svensson, A. Baadsager, P. Persson, A. Hvidberg, C. S. Siggaard-Andersen, M. L. 2003 https://epic.awi.de/id/eprint/7466/ https://hdl.handle.net/10013/epic.18010 unknown Svensson, A. , Baadsager, P. , Persson, A. , Hvidberg, C. S. and Siggaard-Andersen, M. L. (2003) Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth , Annals of Glaciology, 37 , pp. 119-122 . hdl:10013/epic.18010 EPIC3Annals of Glaciology, 37, pp. 119-122 Article isiRev 2003 ftawi 2023-08-22T19:46:44Z The aim of this case study is to quantify the seasonal variability in crystal properties, and to discuss the reason for the variability. A continuous 1.10 m long vertical thin section profile covering approximately five annual cycles has been obtained from the NorthGRIP ice core at around 301 m depth. The crystal outline and the c-axis orientation of more than 13k crystals in the profile have been measured on a new Australian automated ice crystal analyzer. In 2.5 cm resolution we observe a strong seasonal variability in crystal areas of more than 30 % deviation from the average value of 6.7 mm2. Each year, a band of smaller crystals is observed in ice deposited during springtime. The area distribution function is found to be close to a log normal distribution. The crystal areas are compared to the concentration of chemical impurities in the ice; at a 5 cm resolution, the best correlation is found with the concentration of Ca2+. Our results show no seasonal variability of the average c-axis orientation of ice crystals. Article in Journal/Newspaper Annals of Glaciology ice core 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 |
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description |
The aim of this case study is to quantify the seasonal variability in crystal properties, and to discuss the reason for the variability. A continuous 1.10 m long vertical thin section profile covering approximately five annual cycles has been obtained from the NorthGRIP ice core at around 301 m depth. The crystal outline and the c-axis orientation of more than 13k crystals in the profile have been measured on a new Australian automated ice crystal analyzer. In 2.5 cm resolution we observe a strong seasonal variability in crystal areas of more than 30 % deviation from the average value of 6.7 mm2. Each year, a band of smaller crystals is observed in ice deposited during springtime. The area distribution function is found to be close to a log normal distribution. The crystal areas are compared to the concentration of chemical impurities in the ice; at a 5 cm resolution, the best correlation is found with the concentration of Ca2+. Our results show no seasonal variability of the average c-axis orientation of ice crystals. |
format |
Article in Journal/Newspaper |
author |
Svensson, A. Baadsager, P. Persson, A. Hvidberg, C. S. Siggaard-Andersen, M. L. |
spellingShingle |
Svensson, A. Baadsager, P. Persson, A. Hvidberg, C. S. Siggaard-Andersen, M. L. Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth |
author_facet |
Svensson, A. Baadsager, P. Persson, A. Hvidberg, C. S. Siggaard-Andersen, M. L. |
author_sort |
Svensson, A. |
title |
Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth |
title_short |
Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth |
title_full |
Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth |
title_fullStr |
Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth |
title_full_unstemmed |
Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth |
title_sort |
seasonal variability in ice crystal properties at northgrip. a case study around 301 m depth |
publishDate |
2003 |
url |
https://epic.awi.de/id/eprint/7466/ https://hdl.handle.net/10013/epic.18010 |
genre |
Annals of Glaciology ice core |
genre_facet |
Annals of Glaciology ice core |
op_source |
EPIC3Annals of Glaciology, 37, pp. 119-122 |
op_relation |
Svensson, A. , Baadsager, P. , Persson, A. , Hvidberg, C. S. and Siggaard-Andersen, M. L. (2003) Seasonal variability in ice crystal properties at NorthGRIP. A case study around 301 m depth , Annals of Glaciology, 37 , pp. 119-122 . hdl:10013/epic.18010 |
_version_ |
1776198796020023296 |