Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period
A continuous high-resolution record of digital images has been obtained from the North Greenland Ice Core Project (NorthGRIP) ice core (75.1N, 42.3W) in the depth interval from 1330 m to the bedrock at 3085 m. The ice core stratigraphy is clearly visible throughout the glacial period with the most f...
Published in: | Journal of Geophysical Research |
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Online Access: | https://epic.awi.de/id/eprint/12321/ https://epic.awi.de/id/eprint/12321/1/Sve2005a.pdf http://onlinelibrary.wiley.com/doi/10.1029/2004JD005134/abstract;jsessionid=2487B83A086A4EDA456793545ED962D3.f04t04 https://hdl.handle.net/10013/epic.22750 https://hdl.handle.net/10013/epic.22750.d001 |
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ftawi:oai:epic.awi.de:12321 2023-09-05T13:19:50+02:00 Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period Svensson, Anders Nielsen, Søren Wedel Kipfstuhl, Sepp Johnsen, Sigfus J. Steffensen, Jørgen Peder Bigler, Matthias Ruth, Urs Röthlisberger, Regine 2005-01-27 application/pdf https://epic.awi.de/id/eprint/12321/ https://epic.awi.de/id/eprint/12321/1/Sve2005a.pdf http://onlinelibrary.wiley.com/doi/10.1029/2004JD005134/abstract;jsessionid=2487B83A086A4EDA456793545ED962D3.f04t04 https://hdl.handle.net/10013/epic.22750 https://hdl.handle.net/10013/epic.22750.d001 unknown Wiley https://epic.awi.de/id/eprint/12321/1/Sve2005a.pdf https://hdl.handle.net/10013/epic.22750.d001 Svensson, A. , Nielsen, S. W. , Kipfstuhl, S. , Johnsen, S. J. , Steffensen, J. P. , Bigler, M. , Ruth, U. and Röthlisberger, R. (2005) Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period , Jourmal of Geophysical Research: Atmospheres, 110 (D2), D02108 . doi:10.1029/2004JD005134 <https://doi.org/10.1029/2004JD005134> , hdl:10013/epic.22750 EPIC3Jourmal of Geophysical Research: Atmospheres, Wiley, 110(D2), pp. D02108, ISSN: 2169-8996 Article isiRev 2005 ftawi https://doi.org/10.1029/2004JD005134 2023-08-22T19:49:51Z A continuous high-resolution record of digital images has been obtained from the North Greenland Ice Core Project (NorthGRIP) ice core (75.1N, 42.3W) in the depth interval from 1330 m to the bedrock at 3085 m. The ice core stratigraphy is clearly visible throughout the glacial period with the most frequent and brightest visible layers appearing during the coldest events. Down to a depth of 2600 m the horizontal layeringis very regular; below this depth, small irregularities in the layering start to appear, and below 2800 m the visual stratigraphy becomes more uncertain, perhaps because of penetration into climatically warmer ice. Comparison of the visual stratigraphy with high-resolution continuous records of chemical impurities and dust reveals a high degree of correlation, which indicates that the visible layers are caused by these impurities. Anew approach is used to automatically determine annual layer thicknesses from the visual stratigraphy record by carrying out a frequency analysis of the most prominent visible layers in the profile. The result gives strong support for the NorthGRIP timescale model. Article in Journal/Newspaper Greenland Greenland ice core Greenland Ice core Project ice core North Greenland North Greenland Ice Core Project Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland Journal of Geophysical Research 110 D2 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
A continuous high-resolution record of digital images has been obtained from the North Greenland Ice Core Project (NorthGRIP) ice core (75.1N, 42.3W) in the depth interval from 1330 m to the bedrock at 3085 m. The ice core stratigraphy is clearly visible throughout the glacial period with the most frequent and brightest visible layers appearing during the coldest events. Down to a depth of 2600 m the horizontal layeringis very regular; below this depth, small irregularities in the layering start to appear, and below 2800 m the visual stratigraphy becomes more uncertain, perhaps because of penetration into climatically warmer ice. Comparison of the visual stratigraphy with high-resolution continuous records of chemical impurities and dust reveals a high degree of correlation, which indicates that the visible layers are caused by these impurities. Anew approach is used to automatically determine annual layer thicknesses from the visual stratigraphy record by carrying out a frequency analysis of the most prominent visible layers in the profile. The result gives strong support for the NorthGRIP timescale model. |
format |
Article in Journal/Newspaper |
author |
Svensson, Anders Nielsen, Søren Wedel Kipfstuhl, Sepp Johnsen, Sigfus J. Steffensen, Jørgen Peder Bigler, Matthias Ruth, Urs Röthlisberger, Regine |
spellingShingle |
Svensson, Anders Nielsen, Søren Wedel Kipfstuhl, Sepp Johnsen, Sigfus J. Steffensen, Jørgen Peder Bigler, Matthias Ruth, Urs Röthlisberger, Regine Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period |
author_facet |
Svensson, Anders Nielsen, Søren Wedel Kipfstuhl, Sepp Johnsen, Sigfus J. Steffensen, Jørgen Peder Bigler, Matthias Ruth, Urs Röthlisberger, Regine |
author_sort |
Svensson, Anders |
title |
Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period |
title_short |
Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period |
title_full |
Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period |
title_fullStr |
Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period |
title_full_unstemmed |
Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period |
title_sort |
visual stratigraphy of the north greenland ice core project (northgrip) ice core during the last glacial period |
publisher |
Wiley |
publishDate |
2005 |
url |
https://epic.awi.de/id/eprint/12321/ https://epic.awi.de/id/eprint/12321/1/Sve2005a.pdf http://onlinelibrary.wiley.com/doi/10.1029/2004JD005134/abstract;jsessionid=2487B83A086A4EDA456793545ED962D3.f04t04 https://hdl.handle.net/10013/epic.22750 https://hdl.handle.net/10013/epic.22750.d001 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core Greenland Ice core Project ice core North Greenland North Greenland Ice Core Project |
genre_facet |
Greenland Greenland ice core Greenland Ice core Project ice core North Greenland North Greenland Ice Core Project |
op_source |
EPIC3Jourmal of Geophysical Research: Atmospheres, Wiley, 110(D2), pp. D02108, ISSN: 2169-8996 |
op_relation |
https://epic.awi.de/id/eprint/12321/1/Sve2005a.pdf https://hdl.handle.net/10013/epic.22750.d001 Svensson, A. , Nielsen, S. W. , Kipfstuhl, S. , Johnsen, S. J. , Steffensen, J. P. , Bigler, M. , Ruth, U. and Röthlisberger, R. (2005) Visual stratigraphy of the North Greenland Ice Core Project (NorthGRIP) ice core during the last glacial period , Jourmal of Geophysical Research: Atmospheres, 110 (D2), D02108 . doi:10.1029/2004JD005134 <https://doi.org/10.1029/2004JD005134> , hdl:10013/epic.22750 |
op_doi |
https://doi.org/10.1029/2004JD005134 |
container_title |
Journal of Geophysical Research |
container_volume |
110 |
container_issue |
D2 |
_version_ |
1776200636277194752 |