The Tunguska event and Cheko lake origin: dendrochronological analysis
Abstract Dendrochronological research was carried out on 23 trees samples (Larix sibirica and Picea obovata) sampled during the 1999 expedition in two locations, close to the epicentre zone and near Cheko lake (N 60°57′, E 101°51′). Basal Area Increment (BAI) analysis has shown a general long growth...
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Online Access: | http://dx.doi.org/10.1017/s1473550414000445 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550414000445 |
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crcambridgeupr:10.1017/s1473550414000445 2024-04-07T07:55:25+00:00 The Tunguska event and Cheko lake origin: dendrochronological analysis Rosanna, Fantucci Romano, Serra Gunther, Kletetschka Mario, Di Martino 2014 http://dx.doi.org/10.1017/s1473550414000445 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550414000445 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms International Journal of Astrobiology volume 14, issue 3, page 345-357 ISSN 1473-5504 1475-3006 Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics journal-article 2014 crcambridgeupr https://doi.org/10.1017/s1473550414000445 2024-03-08T00:34:04Z Abstract Dendrochronological research was carried out on 23 trees samples (Larix sibirica and Picea obovata) sampled during the 1999 expedition in two locations, close to the epicentre zone and near Cheko lake (N 60°57′, E 101°51′). Basal Area Increment (BAI) analysis has shown a general long growth suppression before 1908, the year of Tunguska event (TE), followed by a sudden growth increase due to diminished competition of trees that died due to the event. In one group of the trees, we detected growth decrease for several years (due to damage to the trunk, branches and crown), followed by growth increase during the following 4–14 years. We show that trees that germinated after the TE, and living in close proximity of Cheko lake (Cheko lake trees) had different behaviour patterns when compared to those trees living further from Cheko lake, inside the forest (Forest trees). Cheko lake trees have shown a vigorous continuous growth increase. Forest trees have shown a vigorous growth during the first 10–30 years of age, followed by a period of suppressed growth. We interpret the suppressed growth by the re-established competition with the surroundings trees. Cheko lake pattern, however, is consistent with the formation of the lake at the time of TE. This observation supports the hypothesis that Cheko lake formation is due to a fragment originating during TE, creating a small impact crater into the permafrost and soft alluvial deposits of Kimku River plain. This is further supported by the fact that Cheko lake has an elliptical shape elongated towards the epicentre of TE. Article in Journal/Newspaper permafrost Cambridge University Press Tunguska ENVELOPE(144.784,144.784,59.388,59.388) International Journal of Astrobiology 14 3 345 357 |
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Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics |
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Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics Rosanna, Fantucci Romano, Serra Gunther, Kletetschka Mario, Di Martino The Tunguska event and Cheko lake origin: dendrochronological analysis |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Space and Planetary Science Physics and Astronomy (miscellaneous) Ecology, Evolution, Behavior and Systematics |
description |
Abstract Dendrochronological research was carried out on 23 trees samples (Larix sibirica and Picea obovata) sampled during the 1999 expedition in two locations, close to the epicentre zone and near Cheko lake (N 60°57′, E 101°51′). Basal Area Increment (BAI) analysis has shown a general long growth suppression before 1908, the year of Tunguska event (TE), followed by a sudden growth increase due to diminished competition of trees that died due to the event. In one group of the trees, we detected growth decrease for several years (due to damage to the trunk, branches and crown), followed by growth increase during the following 4–14 years. We show that trees that germinated after the TE, and living in close proximity of Cheko lake (Cheko lake trees) had different behaviour patterns when compared to those trees living further from Cheko lake, inside the forest (Forest trees). Cheko lake trees have shown a vigorous continuous growth increase. Forest trees have shown a vigorous growth during the first 10–30 years of age, followed by a period of suppressed growth. We interpret the suppressed growth by the re-established competition with the surroundings trees. Cheko lake pattern, however, is consistent with the formation of the lake at the time of TE. This observation supports the hypothesis that Cheko lake formation is due to a fragment originating during TE, creating a small impact crater into the permafrost and soft alluvial deposits of Kimku River plain. This is further supported by the fact that Cheko lake has an elliptical shape elongated towards the epicentre of TE. |
format |
Article in Journal/Newspaper |
author |
Rosanna, Fantucci Romano, Serra Gunther, Kletetschka Mario, Di Martino |
author_facet |
Rosanna, Fantucci Romano, Serra Gunther, Kletetschka Mario, Di Martino |
author_sort |
Rosanna, Fantucci |
title |
The Tunguska event and Cheko lake origin: dendrochronological analysis |
title_short |
The Tunguska event and Cheko lake origin: dendrochronological analysis |
title_full |
The Tunguska event and Cheko lake origin: dendrochronological analysis |
title_fullStr |
The Tunguska event and Cheko lake origin: dendrochronological analysis |
title_full_unstemmed |
The Tunguska event and Cheko lake origin: dendrochronological analysis |
title_sort |
tunguska event and cheko lake origin: dendrochronological analysis |
publisher |
Cambridge University Press (CUP) |
publishDate |
2014 |
url |
http://dx.doi.org/10.1017/s1473550414000445 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S1473550414000445 |
long_lat |
ENVELOPE(144.784,144.784,59.388,59.388) |
geographic |
Tunguska |
geographic_facet |
Tunguska |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
International Journal of Astrobiology volume 14, issue 3, page 345-357 ISSN 1473-5504 1475-3006 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s1473550414000445 |
container_title |
International Journal of Astrobiology |
container_volume |
14 |
container_issue |
3 |
container_start_page |
345 |
op_container_end_page |
357 |
_version_ |
1795672552477032448 |