Regional Radiocarbon Effect Due to Thawing of Frozen Earth
Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861-1885 at ca. 3.5 precision shows no evidence of an anomalous 11-yr cycle of 14C near the Arctic Circle in the Mackenzie River area. However, the ∆14C measurements are lower on average by 2.7 0.9 (v) relative to...
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Radiocarbon
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ftunivarizonaojs:oai:journals.uair.arizona.edu:article/1923 2023-05-15T15:03:25+02:00 Regional Radiocarbon Effect Due to Thawing of Frozen Earth Damon, P E. Burr, George Peristykh, A. N. Jacoby, G. C. D'Arrigo, R. D. 1996-01-01 application/pdf https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1923 eng eng Radiocarbon https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1923/1924 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1923 Radiocarbon; Vol 38, No 3 (1996); 597-602 0033-8222 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 1996 ftunivarizonaojs 2020-11-14T17:53:01Z Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861-1885 at ca. 3.5 precision shows no evidence of an anomalous 11-yr cycle of 14C near the Arctic Circle in the Mackenzie River area. However, the ∆14C measurements are lower on average by 2.7 0.9 (v) relative to 14C measurements on tree rings from the Pacific Northwest (Stuiver and Braziunas 1993). We attribute this depression of 14C to thawing of the ice and snow cover followed by melting of frozen earth that releases trapped 14C-depleted CO2 to the atmosphere during the short growing season from May through August. Correlation of ∆14C with May-August estimated temperatures yields a correlation index of r = 0.60. The reduction in ∆14C is dominated by seven years of anomalous depletion. These years are 1861, 1867-1869, 1879-1880 and 1883. The years 1867-1869 are coincident with a very strong ENSO event. Article in Journal/Newspaper Arctic Mackenzie river Journals at the University of Arizona Arctic Mackenzie River Pacific |
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Open Polar |
collection |
Journals at the University of Arizona |
op_collection_id |
ftunivarizonaojs |
language |
English |
description |
Accelerator mass spectrometry (AMS) measurement of 25 single-year tree rings from AD 1861-1885 at ca. 3.5 precision shows no evidence of an anomalous 11-yr cycle of 14C near the Arctic Circle in the Mackenzie River area. However, the ∆14C measurements are lower on average by 2.7 0.9 (v) relative to 14C measurements on tree rings from the Pacific Northwest (Stuiver and Braziunas 1993). We attribute this depression of 14C to thawing of the ice and snow cover followed by melting of frozen earth that releases trapped 14C-depleted CO2 to the atmosphere during the short growing season from May through August. Correlation of ∆14C with May-August estimated temperatures yields a correlation index of r = 0.60. The reduction in ∆14C is dominated by seven years of anomalous depletion. These years are 1861, 1867-1869, 1879-1880 and 1883. The years 1867-1869 are coincident with a very strong ENSO event. |
format |
Article in Journal/Newspaper |
author |
Damon, P E. Burr, George Peristykh, A. N. Jacoby, G. C. D'Arrigo, R. D. |
spellingShingle |
Damon, P E. Burr, George Peristykh, A. N. Jacoby, G. C. D'Arrigo, R. D. Regional Radiocarbon Effect Due to Thawing of Frozen Earth |
author_facet |
Damon, P E. Burr, George Peristykh, A. N. Jacoby, G. C. D'Arrigo, R. D. |
author_sort |
Damon, P E. |
title |
Regional Radiocarbon Effect Due to Thawing of Frozen Earth |
title_short |
Regional Radiocarbon Effect Due to Thawing of Frozen Earth |
title_full |
Regional Radiocarbon Effect Due to Thawing of Frozen Earth |
title_fullStr |
Regional Radiocarbon Effect Due to Thawing of Frozen Earth |
title_full_unstemmed |
Regional Radiocarbon Effect Due to Thawing of Frozen Earth |
title_sort |
regional radiocarbon effect due to thawing of frozen earth |
publisher |
Radiocarbon |
publishDate |
1996 |
url |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1923 |
geographic |
Arctic Mackenzie River Pacific |
geographic_facet |
Arctic Mackenzie River Pacific |
genre |
Arctic Mackenzie river |
genre_facet |
Arctic Mackenzie river |
op_source |
Radiocarbon; Vol 38, No 3 (1996); 597-602 0033-8222 |
op_relation |
https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1923/1924 https://journals.uair.arizona.edu/index.php/radiocarbon/article/view/1923 |
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1766335267577266176 |