Retrieving a common accumulation record from Greenland ice cores for the past 1800 years
Udgivelsesdato: August 10 In the accumulation zone of the Greenland ice sheet the annual accumulation rate may be determined through identification of the annual cycle in the isotopic climate signal and other parameters that exhibit seasonal variations. On an annual basis the accumulation rate in di...
Published in: | Journal of Geophysical Research |
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ftcopenhagenunip:oai:pure.atira.dk:publications/c002d490-74c2-11db-bee9-02004c4f4f50 2023-06-18T03:40:48+02:00 Retrieving a common accumulation record from Greenland ice cores for the past 1800 years Andersen, Katrine K. Ditlevsen, Peter D. Rasmussen, Sune Olander Clausen, Henrik Brink Vinther, Bo Møllesøe Johnsen, Sigfus Johann Steffensen, Jørgen Peder 2006 application/pdf https://curis.ku.dk/portal/da/publications/retrieving-a-common-accumulation-record-from-greenland-ice-cores-for-the-past-1800-years(c002d490-74c2-11db-bee9-02004c4f4f50).html https://doi.org/10.1029/2005JD006765 https://curis.ku.dk/ws/files/1795850/2005JD006765_preprint.pdf eng eng info:eu-repo/semantics/closedAccess Andersen , K K , Ditlevsen , P D , Rasmussen , S O , Clausen , H B , Vinther , B M , Johnsen , S J & Steffensen , J P 2006 , ' Retrieving a common accumulation record from Greenland ice cores for the past 1800 years ' , Journal of Geophysical Research - Atmospheres , vol. 111 , no. D15 , pp. D15106 . https://doi.org/10.1029/2005JD006765 article 2006 ftcopenhagenunip https://doi.org/10.1029/2005JD006765 2023-06-07T23:04:16Z Udgivelsesdato: August 10 In the accumulation zone of the Greenland ice sheet the annual accumulation rate may be determined through identification of the annual cycle in the isotopic climate signal and other parameters that exhibit seasonal variations. On an annual basis the accumulation rate in different Greenland ice cores is highly variable, and the degree of correlation between accumulation series from different ice cores is low. However, when using multiyear averages of the different accumulation records, the correlation increases significantly. A statistical model has been developed to estimate the common climate signal in the different accumulation records through optimization of the ratio between the variance of the common signal and of the residual. Using this model, a common Greenland accumulation record for the past 1800 years has been extracted. The record shows significant 11.9 years periodicity. A sharp transition to very dry conditions is found just before A.D. 1200, and very dry conditions during the 13th century together with dry and cold spells during the 14th century may have put extra strain on the Norse population in Greenland and may have contributed to their extinction. Accumulation rates gradually decrease from a distinct maximum in A.D. 1394 to very dry conditions in the late 17th century and thus reflect the Little Ice Age. Article in Journal/Newspaper Greenland Greenland ice cores Ice Sheet University of Copenhagen: Research Greenland Journal of Geophysical Research 111 D15 |
institution |
Open Polar |
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University of Copenhagen: Research |
op_collection_id |
ftcopenhagenunip |
language |
English |
description |
Udgivelsesdato: August 10 In the accumulation zone of the Greenland ice sheet the annual accumulation rate may be determined through identification of the annual cycle in the isotopic climate signal and other parameters that exhibit seasonal variations. On an annual basis the accumulation rate in different Greenland ice cores is highly variable, and the degree of correlation between accumulation series from different ice cores is low. However, when using multiyear averages of the different accumulation records, the correlation increases significantly. A statistical model has been developed to estimate the common climate signal in the different accumulation records through optimization of the ratio between the variance of the common signal and of the residual. Using this model, a common Greenland accumulation record for the past 1800 years has been extracted. The record shows significant 11.9 years periodicity. A sharp transition to very dry conditions is found just before A.D. 1200, and very dry conditions during the 13th century together with dry and cold spells during the 14th century may have put extra strain on the Norse population in Greenland and may have contributed to their extinction. Accumulation rates gradually decrease from a distinct maximum in A.D. 1394 to very dry conditions in the late 17th century and thus reflect the Little Ice Age. |
format |
Article in Journal/Newspaper |
author |
Andersen, Katrine K. Ditlevsen, Peter D. Rasmussen, Sune Olander Clausen, Henrik Brink Vinther, Bo Møllesøe Johnsen, Sigfus Johann Steffensen, Jørgen Peder |
spellingShingle |
Andersen, Katrine K. Ditlevsen, Peter D. Rasmussen, Sune Olander Clausen, Henrik Brink Vinther, Bo Møllesøe Johnsen, Sigfus Johann Steffensen, Jørgen Peder Retrieving a common accumulation record from Greenland ice cores for the past 1800 years |
author_facet |
Andersen, Katrine K. Ditlevsen, Peter D. Rasmussen, Sune Olander Clausen, Henrik Brink Vinther, Bo Møllesøe Johnsen, Sigfus Johann Steffensen, Jørgen Peder |
author_sort |
Andersen, Katrine K. |
title |
Retrieving a common accumulation record from Greenland ice cores for the past 1800 years |
title_short |
Retrieving a common accumulation record from Greenland ice cores for the past 1800 years |
title_full |
Retrieving a common accumulation record from Greenland ice cores for the past 1800 years |
title_fullStr |
Retrieving a common accumulation record from Greenland ice cores for the past 1800 years |
title_full_unstemmed |
Retrieving a common accumulation record from Greenland ice cores for the past 1800 years |
title_sort |
retrieving a common accumulation record from greenland ice cores for the past 1800 years |
publishDate |
2006 |
url |
https://curis.ku.dk/portal/da/publications/retrieving-a-common-accumulation-record-from-greenland-ice-cores-for-the-past-1800-years(c002d490-74c2-11db-bee9-02004c4f4f50).html https://doi.org/10.1029/2005JD006765 https://curis.ku.dk/ws/files/1795850/2005JD006765_preprint.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice cores Ice Sheet |
genre_facet |
Greenland Greenland ice cores Ice Sheet |
op_source |
Andersen , K K , Ditlevsen , P D , Rasmussen , S O , Clausen , H B , Vinther , B M , Johnsen , S J & Steffensen , J P 2006 , ' Retrieving a common accumulation record from Greenland ice cores for the past 1800 years ' , Journal of Geophysical Research - Atmospheres , vol. 111 , no. D15 , pp. D15106 . https://doi.org/10.1029/2005JD006765 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2005JD006765 |
container_title |
Journal of Geophysical Research |
container_volume |
111 |
container_issue |
D15 |
_version_ |
1769006124140331008 |