Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction
ABSTRACT Published marine sediment core records and new information from terrestrial aeolian deposits from the surroundings of Igaliku Fjord, south Greenland, have been used for a tentative reconstruction of multi-decadal to centennial scale changes in the intensity of regional atmospheric circulati...
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Online Access: | http://dx.doi.org/10.1017/s0032247408007699 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247408007699 |
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crcambridgeupr:10.1017/s0032247408007699 2024-09-30T14:34:18+00:00 Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction Kuijpers, Antoon Mikkelsen, Naja 2009 http://dx.doi.org/10.1017/s0032247408007699 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247408007699 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Polar Record volume 45, issue 1, page 1-8 ISSN 0032-2474 1475-3057 journal-article 2009 crcambridgeupr https://doi.org/10.1017/s0032247408007699 2024-09-11T04:04:13Z ABSTRACT Published marine sediment core records and new information from terrestrial aeolian deposits from the surroundings of Igaliku Fjord, south Greenland, have been used for a tentative reconstruction of multi-decadal to centennial scale changes in the intensity of regional atmospheric circulation since the Medieval Warm Period. The marine data show that aeolian activity over southern Greenland was generally enhanced in the Medieval Warm Period between c. AD 900 and c. AD 1300. The preliminary data from the onshore aeolian deposits suggest that wind activity was strongest after AD 1000, reaching a peak close to AD 1300, after which atmospheric circulation intensity decreased. A comparison with the marine data shows that this decrease coincides with increased advection of Polar Water by the East Greenland Current at the beginning of the Little Ice Age. The aeolian sediment record suggests foehn wind activity displaying multi-decadal oscillations in the range of known north Atlantic climate oscillations. The intensity of erosional processes in south Greenland has previously often been attributed to farming activities initiated after AD 1000 by the Norse who disappeared a few hundred years later. Our findings suggest, however, that erosion in this area is mainly related to marked variations in wind strength. Article in Journal/Newspaper East Greenland east greenland current Greenland Igaliku North Atlantic Polar Record Cambridge University Press Greenland Igaliku ENVELOPE(-45.421,-45.421,60.988,60.988) Igaliku Fjord ENVELOPE(-45.599,-45.599,60.801,60.801) Polar Record 45 1 1 8 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
ABSTRACT Published marine sediment core records and new information from terrestrial aeolian deposits from the surroundings of Igaliku Fjord, south Greenland, have been used for a tentative reconstruction of multi-decadal to centennial scale changes in the intensity of regional atmospheric circulation since the Medieval Warm Period. The marine data show that aeolian activity over southern Greenland was generally enhanced in the Medieval Warm Period between c. AD 900 and c. AD 1300. The preliminary data from the onshore aeolian deposits suggest that wind activity was strongest after AD 1000, reaching a peak close to AD 1300, after which atmospheric circulation intensity decreased. A comparison with the marine data shows that this decrease coincides with increased advection of Polar Water by the East Greenland Current at the beginning of the Little Ice Age. The aeolian sediment record suggests foehn wind activity displaying multi-decadal oscillations in the range of known north Atlantic climate oscillations. The intensity of erosional processes in south Greenland has previously often been attributed to farming activities initiated after AD 1000 by the Norse who disappeared a few hundred years later. Our findings suggest, however, that erosion in this area is mainly related to marked variations in wind strength. |
format |
Article in Journal/Newspaper |
author |
Kuijpers, Antoon Mikkelsen, Naja |
spellingShingle |
Kuijpers, Antoon Mikkelsen, Naja Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction |
author_facet |
Kuijpers, Antoon Mikkelsen, Naja |
author_sort |
Kuijpers, Antoon |
title |
Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction |
title_short |
Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction |
title_full |
Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction |
title_fullStr |
Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction |
title_full_unstemmed |
Geological records of changes in wind regime over south Greenland since the Medieval Warm Period: a tentative reconstruction |
title_sort |
geological records of changes in wind regime over south greenland since the medieval warm period: a tentative reconstruction |
publisher |
Cambridge University Press (CUP) |
publishDate |
2009 |
url |
http://dx.doi.org/10.1017/s0032247408007699 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0032247408007699 |
long_lat |
ENVELOPE(-45.421,-45.421,60.988,60.988) ENVELOPE(-45.599,-45.599,60.801,60.801) |
geographic |
Greenland Igaliku Igaliku Fjord |
geographic_facet |
Greenland Igaliku Igaliku Fjord |
genre |
East Greenland east greenland current Greenland Igaliku North Atlantic Polar Record |
genre_facet |
East Greenland east greenland current Greenland Igaliku North Atlantic Polar Record |
op_source |
Polar Record volume 45, issue 1, page 1-8 ISSN 0032-2474 1475-3057 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0032247408007699 |
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Polar Record |
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45 |
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1811637964487262208 |