Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming
A seismogenic trigger mechanism is proposed to explain the abrupt climate warming phases in the Arctic as a result of strong mechanical disturbances in the marginal region of the Arctic lithosphere. Those disturbances might have been caused by great earthquakes in the Aleutian subduction zone, and s...
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Online Access: | https://doi.org/10.3390/geosciences10110428 https://doaj.org/article/0af00fe100484431bec44fe53c83c530 |
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ftdoajarticles:oai:doaj.org/article:0af00fe100484431bec44fe53c83c530 2023-05-15T13:14:45+02:00 Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming Leopold Lobkovsky 2020-10-01T00:00:00Z https://doi.org/10.3390/geosciences10110428 https://doaj.org/article/0af00fe100484431bec44fe53c83c530 EN eng MDPI AG https://www.mdpi.com/2076-3263/10/11/428 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences10110428 2076-3263 https://doaj.org/article/0af00fe100484431bec44fe53c83c530 Geosciences, Vol 10, Iss 428, p 428 (2020) abrupt climate warming Arctic great earthquakes Aleutian subduction zone tectonic waves trigger mechanism Geology QE1-996.5 article 2020 ftdoajarticles https://doi.org/10.3390/geosciences10110428 2022-12-31T05:03:38Z A seismogenic trigger mechanism is proposed to explain the abrupt climate warming phases in the Arctic as a result of strong mechanical disturbances in the marginal region of the Arctic lithosphere. Those disturbances might have been caused by great earthquakes in the Aleutian subduction zone, and slowly propagated across the Arctic shelf and adjacent regions, triggering the methane release from permafrost and metastable gas hydrates, followed by greenhouse gas emissions into the atmosphere. The proposed mechanism is based on the identified correlation between the series of the great earthquakes in the Aleutian island arc, which occurred in the early and middle of the 20th century, and the two phases of sharp climate warming, which began in 1920 and 1980. There is a 20-year time lag between these events, which is explained by the time of arrival of deformation waves in the lithosphere (propagating with a velocity of about 100 km per year) at the Arctic shelf and adjacent land from the Aleutian subduction zone, the region of their generation. The trigger mechanism causing the methane release from permafrost and metastable gas hydrates is related to the destruction of micro-sized ice films covering gas hydrate particles, the elements highly important for hydrate self-preservation, as well as destruction of gas-saturated micropores in permafrost rocks due to the slight additional stresses associated with deformation waves, and thus emergence of conditions favorable for gas filtration and its subsequent emission. Article in Journal/Newspaper Aleutian Island Arctic Ice permafrost Directory of Open Access Journals: DOAJ Articles Arctic Geosciences 10 11 428 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
abrupt climate warming Arctic great earthquakes Aleutian subduction zone tectonic waves trigger mechanism Geology QE1-996.5 |
spellingShingle |
abrupt climate warming Arctic great earthquakes Aleutian subduction zone tectonic waves trigger mechanism Geology QE1-996.5 Leopold Lobkovsky Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming |
topic_facet |
abrupt climate warming Arctic great earthquakes Aleutian subduction zone tectonic waves trigger mechanism Geology QE1-996.5 |
description |
A seismogenic trigger mechanism is proposed to explain the abrupt climate warming phases in the Arctic as a result of strong mechanical disturbances in the marginal region of the Arctic lithosphere. Those disturbances might have been caused by great earthquakes in the Aleutian subduction zone, and slowly propagated across the Arctic shelf and adjacent regions, triggering the methane release from permafrost and metastable gas hydrates, followed by greenhouse gas emissions into the atmosphere. The proposed mechanism is based on the identified correlation between the series of the great earthquakes in the Aleutian island arc, which occurred in the early and middle of the 20th century, and the two phases of sharp climate warming, which began in 1920 and 1980. There is a 20-year time lag between these events, which is explained by the time of arrival of deformation waves in the lithosphere (propagating with a velocity of about 100 km per year) at the Arctic shelf and adjacent land from the Aleutian subduction zone, the region of their generation. The trigger mechanism causing the methane release from permafrost and metastable gas hydrates is related to the destruction of micro-sized ice films covering gas hydrate particles, the elements highly important for hydrate self-preservation, as well as destruction of gas-saturated micropores in permafrost rocks due to the slight additional stresses associated with deformation waves, and thus emergence of conditions favorable for gas filtration and its subsequent emission. |
format |
Article in Journal/Newspaper |
author |
Leopold Lobkovsky |
author_facet |
Leopold Lobkovsky |
author_sort |
Leopold Lobkovsky |
title |
Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming |
title_short |
Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming |
title_full |
Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming |
title_fullStr |
Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming |
title_full_unstemmed |
Seismogenic-Triggering Mechanism of Gas Emission Activizations on the Arctic Shelf and Associated Phases of Abrupt Warming |
title_sort |
seismogenic-triggering mechanism of gas emission activizations on the arctic shelf and associated phases of abrupt warming |
publisher |
MDPI AG |
publishDate |
2020 |
url |
https://doi.org/10.3390/geosciences10110428 https://doaj.org/article/0af00fe100484431bec44fe53c83c530 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Aleutian Island Arctic Ice permafrost |
genre_facet |
Aleutian Island Arctic Ice permafrost |
op_source |
Geosciences, Vol 10, Iss 428, p 428 (2020) |
op_relation |
https://www.mdpi.com/2076-3263/10/11/428 https://doaj.org/toc/2076-3263 doi:10.3390/geosciences10110428 2076-3263 https://doaj.org/article/0af00fe100484431bec44fe53c83c530 |
op_doi |
https://doi.org/10.3390/geosciences10110428 |
container_title |
Geosciences |
container_volume |
10 |
container_issue |
11 |
container_start_page |
428 |
_version_ |
1766265270279602176 |