The Tunguska event and Cheko Lake origin: dendrochronological analysis
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 degrees 57, E 101 degrees 51). Basal Area Increment (BAI) analysis has shown a general long g...
Published in: | International Journal of Astrobiology |
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Language: | English |
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Online Access: | https://doi.org/10.1017/S1473550414000445 http://hdl.handle.net/11104/0247072 |
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ftczacademyscien:oai:asep.lib.cas.cz:CavUnEpca/0444565 2024-09-09T20:03:19+00:00 The Tunguska event and Cheko Lake origin: dendrochronological analysis Fantucci, R. Serra, R. Kletetschka, G. (Günther) Di Martino, M. 2015 https://doi.org/10.1017/S1473550414000445 http://hdl.handle.net/11104/0247072 eng eng doi:10.1017/S1473550414000445 urn:pissn: 1473-5504 urn:eissn: 1475-3006 http://hdl.handle.net/11104/0247072 cosmic body impact collapse crater dendrochronology Tunguska tree rings Russia Siberia info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2015 ftczacademyscien https://doi.org/10.1017/S1473550414000445 2024-08-19T05:32:59Z 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 degrees 57, E 101 degrees 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 Siberia The Czech Academy of Sciences: Publication Activity (ASEP) Tunguska ENVELOPE(144.784,144.784,59.388,59.388) International Journal of Astrobiology 14 3 345 357 |
institution |
Open Polar |
collection |
The Czech Academy of Sciences: Publication Activity (ASEP) |
op_collection_id |
ftczacademyscien |
language |
English |
topic |
cosmic body impact collapse crater dendrochronology Tunguska tree rings Russia Siberia |
spellingShingle |
cosmic body impact collapse crater dendrochronology Tunguska tree rings Russia Siberia Fantucci, R. Serra, R. Kletetschka, G. (Günther) Di Martino, M. The Tunguska event and Cheko Lake origin: dendrochronological analysis |
topic_facet |
cosmic body impact collapse crater dendrochronology Tunguska tree rings Russia Siberia |
description |
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 degrees 57, E 101 degrees 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 |
Fantucci, R. Serra, R. Kletetschka, G. (Günther) Di Martino, M. |
author_facet |
Fantucci, R. Serra, R. Kletetschka, G. (Günther) Di Martino, M. |
author_sort |
Fantucci, R. |
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 |
publishDate |
2015 |
url |
https://doi.org/10.1017/S1473550414000445 http://hdl.handle.net/11104/0247072 |
long_lat |
ENVELOPE(144.784,144.784,59.388,59.388) |
geographic |
Tunguska |
geographic_facet |
Tunguska |
genre |
permafrost Siberia |
genre_facet |
permafrost Siberia |
op_relation |
doi:10.1017/S1473550414000445 urn:pissn: 1473-5504 urn:eissn: 1475-3006 http://hdl.handle.net/11104/0247072 |
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_ |
1809935274984079360 |