Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland
The paper presents studies of various chemical and isotopical parameters from ice cores drilled in the northernmost located ice cap, Hans Tausen Iskappe, Pearyland, Greenland (HT). The 346 m main ice core (MC95) was drilled to bedrock in 1995 as well as a 35 m shallow core (SC95). A 60 m shallow cor...
Published in: | Meddelelser om Grønland. Geoscience |
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Format: | Article in Journal/Newspaper |
Language: | English |
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The Commission for Scientific Research in Greenland /Danish Polar Center
2001
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Online Access: | https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221 |
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ftkbcopenhojs:oai:ojs.tidsskrift.dk:article/140221 2024-01-28T10:04:16+01:00 Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland Clausen, Henrik B. Stampe, Mia Hammer, Claus Uffe Hvidbjerg, Christine S. Dahl-Jensen, Dorthe Steffensen, Jørgen Peder 2001-01-01 application/pdf https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221 eng eng The Commission for Scientific Research in Greenland /Danish Polar Center https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221/184213 https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221 Meddelelser om Grønland. Geoscience; Vol. 39 (2001): Meddelelser om Grønland. Geoscience; 123–149 Meddelelser om Grønland. Geoscience; Årg. 39 (2001): Meddelelser om Grønland, Geoscience; 123–149 1600-4590 0106-1046 10.7146/moggeosci.v39i info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2001 ftkbcopenhojs https://doi.org/10.7146/moggeosci.v39i 2024-01-03T23:58:29Z The paper presents studies of various chemical and isotopical parameters from ice cores drilled in the northernmost located ice cap, Hans Tausen Iskappe, Pearyland, Greenland (HT). The 346 m main ice core (MC95) was drilled to bedrock in 1995 as well as a 35 m shallow core (SC95). A 60 m shallow core (SC75) and a 51 m shallow core (SC76) was drilled at two different positions in1975 and 1976, respectively. A 60 m shallow core (SC94) was drilled in 1994. Continuous stable isotope records exist for all of these cores, total β-activity only from SC75 and SC76. Continuous ECM inferred acidity records exist along the 1995 cores (MC95 and SC95) and finally detailed records of dust and water soluble ion concentrations exist on selected parts of MC95. To determine a time scale for the ice core is an important prerequisite for the interpretation of other records. The age scale is based on acid layers, caused by known volcanic eruptions, and by comparison of the chemical composition of these layers to that found in ice cores from other arctic locations. The total β-activity data from SC75 and SC76 provide fixed points to the time scale because a pronounced increase in total β-activity is related to the thermo-nuclear tests in the atmosphere in the early 1960'ies. Many of the investigated parameters exhibit seasonal variations e.g. δ18O, acidity, Cl– and dust, therefore the study of the accumulation history of the ice cap improves our knowledge of the question if the mass balance of the Hans Tausen Iskappe is in equilibrium or not. In the upper half part of the ice core the MC95 ECM record reveals several events of high acidity which can be connected to volcanic events known from other Greenland ice core records. Among the identified volcanic events are AD 1912 (Katmai, Alaska), AD 1815 (Tambora, Indonesia), AD 1783 (Laki, Iceland), AD 934 (Eldgjà, Iceland) and e.g. the signals of AD 1259 and 49 BC. The two latter signals originate from major volcanic eruptions of unknown eruption sites with a probable location close to ... Article in Journal/Newspaper Arctic Greenland Greenland ice core Hans Tausen iskappe Ice cap ice core Iceland Alaska Tidsskrift.dk (The Royal Library, Denmark) Arctic Greenland Hans Tausen Iskappe ENVELOPE(-37.500,-37.500,82.583,82.583) Laki ENVELOPE(-18.237,-18.237,64.070,64.070) Meddelelser om Grønland. Geoscience 39 |
institution |
Open Polar |
collection |
Tidsskrift.dk (The Royal Library, Denmark) |
op_collection_id |
ftkbcopenhojs |
language |
English |
description |
The paper presents studies of various chemical and isotopical parameters from ice cores drilled in the northernmost located ice cap, Hans Tausen Iskappe, Pearyland, Greenland (HT). The 346 m main ice core (MC95) was drilled to bedrock in 1995 as well as a 35 m shallow core (SC95). A 60 m shallow core (SC75) and a 51 m shallow core (SC76) was drilled at two different positions in1975 and 1976, respectively. A 60 m shallow core (SC94) was drilled in 1994. Continuous stable isotope records exist for all of these cores, total β-activity only from SC75 and SC76. Continuous ECM inferred acidity records exist along the 1995 cores (MC95 and SC95) and finally detailed records of dust and water soluble ion concentrations exist on selected parts of MC95. To determine a time scale for the ice core is an important prerequisite for the interpretation of other records. The age scale is based on acid layers, caused by known volcanic eruptions, and by comparison of the chemical composition of these layers to that found in ice cores from other arctic locations. The total β-activity data from SC75 and SC76 provide fixed points to the time scale because a pronounced increase in total β-activity is related to the thermo-nuclear tests in the atmosphere in the early 1960'ies. Many of the investigated parameters exhibit seasonal variations e.g. δ18O, acidity, Cl– and dust, therefore the study of the accumulation history of the ice cap improves our knowledge of the question if the mass balance of the Hans Tausen Iskappe is in equilibrium or not. In the upper half part of the ice core the MC95 ECM record reveals several events of high acidity which can be connected to volcanic events known from other Greenland ice core records. Among the identified volcanic events are AD 1912 (Katmai, Alaska), AD 1815 (Tambora, Indonesia), AD 1783 (Laki, Iceland), AD 934 (Eldgjà, Iceland) and e.g. the signals of AD 1259 and 49 BC. The two latter signals originate from major volcanic eruptions of unknown eruption sites with a probable location close to ... |
format |
Article in Journal/Newspaper |
author |
Clausen, Henrik B. Stampe, Mia Hammer, Claus Uffe Hvidbjerg, Christine S. Dahl-Jensen, Dorthe Steffensen, Jørgen Peder |
spellingShingle |
Clausen, Henrik B. Stampe, Mia Hammer, Claus Uffe Hvidbjerg, Christine S. Dahl-Jensen, Dorthe Steffensen, Jørgen Peder Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland |
author_facet |
Clausen, Henrik B. Stampe, Mia Hammer, Claus Uffe Hvidbjerg, Christine S. Dahl-Jensen, Dorthe Steffensen, Jørgen Peder |
author_sort |
Clausen, Henrik B. |
title |
Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland |
title_short |
Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland |
title_full |
Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland |
title_fullStr |
Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland |
title_full_unstemmed |
Glaciological and chemical studies on ice cores from Hans Tausen Iskappe, Greenland |
title_sort |
glaciological and chemical studies on ice cores from hans tausen iskappe, greenland |
publisher |
The Commission for Scientific Research in Greenland /Danish Polar Center |
publishDate |
2001 |
url |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221 |
long_lat |
ENVELOPE(-37.500,-37.500,82.583,82.583) ENVELOPE(-18.237,-18.237,64.070,64.070) |
geographic |
Arctic Greenland Hans Tausen Iskappe Laki |
geographic_facet |
Arctic Greenland Hans Tausen Iskappe Laki |
genre |
Arctic Greenland Greenland ice core Hans Tausen iskappe Ice cap ice core Iceland Alaska |
genre_facet |
Arctic Greenland Greenland ice core Hans Tausen iskappe Ice cap ice core Iceland Alaska |
op_source |
Meddelelser om Grønland. Geoscience; Vol. 39 (2001): Meddelelser om Grønland. Geoscience; 123–149 Meddelelser om Grønland. Geoscience; Årg. 39 (2001): Meddelelser om Grønland, Geoscience; 123–149 1600-4590 0106-1046 10.7146/moggeosci.v39i |
op_relation |
https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221/184213 https://tidsskrift.dk/meddrgroenland_geosci/article/view/140221 |
op_doi |
https://doi.org/10.7146/moggeosci.v39i |
container_title |
Meddelelser om Grønland. Geoscience |
container_volume |
39 |
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1789329873308745728 |