Continuous density log of icecore BER11C95_25
A 181 m long ice core was drilled at 79° 36' 51'' S, 45° 43' 28'' W, near the summit of Berkner Island, Antarctica 886 m a.s.l.). Berkner Island is located within the Filchner and Ronne Ice Shelves, and the ice near the summit shows little lateral flow. The density of t...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.227732 2024-09-15T17:39:57+00:00 Continuous density log of icecore BER11C95_25 Gerland, Sebastian Wilhelms, Frank LATITUDE: -79.614160 * LONGITUDE: -45.724330 * DATE/TIME START: 1995-02-08T00:00:00 * DATE/TIME END: 1995-02-08T00:00:00 * MINIMUM DEPTH, ice/snow: 1.139 m * MAXIMUM DEPTH, ice/snow: 178.213 m 1999 text/tab-separated-values, 51175 data points https://doi.pangaea.de/10.1594/PANGAEA.227732 https://doi.org/10.1594/PANGAEA.227732 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.227732 https://doi.org/10.1594/PANGAEA.227732 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Gerland, Sebastian; Oerter, Hans; Kipfstuhl, Sepp; Wilhelms, Frank; Miller, Heinz (1999): Continuous density log of a 181 metre long ice core from the summit of Berkner Island, Antarctica. Annals of Glaciology, 29, 215-219, https://doi.org/10.3189/172756499781821427 AWI_Glac B25 BER11C95_25 Density mass density DEPTH ice/snow Gamma-ray attenuation density (Wilhelms 1996) Glaciology @ AWI ICEDRILL Ice drill dataset 1999 ftpangaea https://doi.org/10.1594/PANGAEA.22773210.3189/172756499781821427 2024-07-24T02:31:23Z A 181 m long ice core was drilled at 79° 36' 51'' S, 45° 43' 28'' W, near the summit of Berkner Island, Antarctica 886 m a.s.l.). Berkner Island is located within the Filchner and Ronne Ice Shelves, and the ice near the summit shows little lateral flow. The density of the ice core was measured every 3 mm along ist length, using attenuation of a gamma-ray beam, which gave an absolute accuracy of 2%. As expected, there is a general density increase with depth, the maximum densities of > 900 kg/m**3 being reached just above 100 m depth. Comparison with electrical conductivity method (ECM) shows density variations with the same wavelength as annual signals, which can be seen in the ECM log (higher acidity during summer). In the shallowest part of the core, the density of winter layers is higher than that of summer layers, a relationship which is reversed at greater depth. We assume that the densification rates for the two types of firn are different. Similar density phenomena were observed on ice cores from Greenland, showing that such phenomena are not a local effect. Dataset Annals of Glaciology Antarc* Antarctica Berkner Island Greenland ice core Ice Shelves PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-45.724330,-45.724330,-79.614160,-79.614160) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
AWI_Glac B25 BER11C95_25 Density mass density DEPTH ice/snow Gamma-ray attenuation density (Wilhelms 1996) Glaciology @ AWI ICEDRILL Ice drill |
spellingShingle |
AWI_Glac B25 BER11C95_25 Density mass density DEPTH ice/snow Gamma-ray attenuation density (Wilhelms 1996) Glaciology @ AWI ICEDRILL Ice drill Gerland, Sebastian Wilhelms, Frank Continuous density log of icecore BER11C95_25 |
topic_facet |
AWI_Glac B25 BER11C95_25 Density mass density DEPTH ice/snow Gamma-ray attenuation density (Wilhelms 1996) Glaciology @ AWI ICEDRILL Ice drill |
description |
A 181 m long ice core was drilled at 79° 36' 51'' S, 45° 43' 28'' W, near the summit of Berkner Island, Antarctica 886 m a.s.l.). Berkner Island is located within the Filchner and Ronne Ice Shelves, and the ice near the summit shows little lateral flow. The density of the ice core was measured every 3 mm along ist length, using attenuation of a gamma-ray beam, which gave an absolute accuracy of 2%. As expected, there is a general density increase with depth, the maximum densities of > 900 kg/m**3 being reached just above 100 m depth. Comparison with electrical conductivity method (ECM) shows density variations with the same wavelength as annual signals, which can be seen in the ECM log (higher acidity during summer). In the shallowest part of the core, the density of winter layers is higher than that of summer layers, a relationship which is reversed at greater depth. We assume that the densification rates for the two types of firn are different. Similar density phenomena were observed on ice cores from Greenland, showing that such phenomena are not a local effect. |
format |
Dataset |
author |
Gerland, Sebastian Wilhelms, Frank |
author_facet |
Gerland, Sebastian Wilhelms, Frank |
author_sort |
Gerland, Sebastian |
title |
Continuous density log of icecore BER11C95_25 |
title_short |
Continuous density log of icecore BER11C95_25 |
title_full |
Continuous density log of icecore BER11C95_25 |
title_fullStr |
Continuous density log of icecore BER11C95_25 |
title_full_unstemmed |
Continuous density log of icecore BER11C95_25 |
title_sort |
continuous density log of icecore ber11c95_25 |
publisher |
PANGAEA |
publishDate |
1999 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.227732 https://doi.org/10.1594/PANGAEA.227732 |
op_coverage |
LATITUDE: -79.614160 * LONGITUDE: -45.724330 * DATE/TIME START: 1995-02-08T00:00:00 * DATE/TIME END: 1995-02-08T00:00:00 * MINIMUM DEPTH, ice/snow: 1.139 m * MAXIMUM DEPTH, ice/snow: 178.213 m |
long_lat |
ENVELOPE(-45.724330,-45.724330,-79.614160,-79.614160) |
genre |
Annals of Glaciology Antarc* Antarctica Berkner Island Greenland ice core Ice Shelves |
genre_facet |
Annals of Glaciology Antarc* Antarctica Berkner Island Greenland ice core Ice Shelves |
op_source |
Supplement to: Gerland, Sebastian; Oerter, Hans; Kipfstuhl, Sepp; Wilhelms, Frank; Miller, Heinz (1999): Continuous density log of a 181 metre long ice core from the summit of Berkner Island, Antarctica. Annals of Glaciology, 29, 215-219, https://doi.org/10.3189/172756499781821427 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.227732 https://doi.org/10.1594/PANGAEA.227732 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.22773210.3189/172756499781821427 |
_version_ |
1810483654365806592 |