Hierarchy of non-extensive mechanical processes in fracturing sea ice
Abstract The fracture-induced oscillations in sea ice were detected by seismographs and seismic tiltmeters established on the Arctic ice pack. Field observations were supplemented with a laboratory experiment. The energy distributions in elastic waves generated during: (i) large-scale ice pack fragm...
Published in: | Acta Geophysica |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Walter de Gruyter GmbH
2012
|
Subjects: | |
Online Access: | http://dx.doi.org/10.2478/s11600-012-0029-5 |
id |
crdegruytopen:10.2478/s11600-012-0029-5 |
---|---|
record_format |
openpolar |
spelling |
crdegruytopen:10.2478/s11600-012-0029-5 2023-05-15T15:06:49+02:00 Hierarchy of non-extensive mechanical processes in fracturing sea ice Chmel, Alexandre Smirnov, Victor Shcherbakov, Igor 2012 http://dx.doi.org/10.2478/s11600-012-0029-5 unknown Walter de Gruyter GmbH Acta Geophysica volume 60, issue 3 ISSN 1895-7455 1895-6572 Geophysics journal-article 2012 crdegruytopen https://doi.org/10.2478/s11600-012-0029-5 2017-05-04T06:25:58Z Abstract The fracture-induced oscillations in sea ice were detected by seismographs and seismic tiltmeters established on the Arctic ice pack. Field observations were supplemented with a laboratory experiment. The energy distributions in elastic waves generated during: (i) large-scale ice pack fragmentation over area of about 105 km2, (ii) local crack propagation in ice floe, and (iii) laboratory ice crashing were constructed and analyzed using principles of the Tsallis statistics. The energy release regimes at different stages of fracturing were characterized by the parameter of nonextensivity q. In terms of the non-extensive statistical mechanics, q > 1 evidences the correlated (non-extensive) dynamics of the process in nonequilibrium system, q = 1 responds to the additivity of events occurring in equilibrium system, and q < 1 takes place when the energy release is additive and limited by an upper cut-off. All these scenarios were revealed in fracture processes occurring at three hierarchic levels. The variation of the q-value demonstrates high thermodynamic changeability of the fracture process driven by irregular external source. The role of energy conservation in fracturing sea ice is discussed in connection with the observed reversible transitions between extensive and non-extensive modes of fracture. Article in Journal/Newspaper Arctic ice pack Sea ice Sciendo (de Gruyter - via CrossRef) Arctic Acta Geophysica 60 3 719 739 |
institution |
Open Polar |
collection |
Sciendo (de Gruyter - via CrossRef) |
op_collection_id |
crdegruytopen |
language |
unknown |
topic |
Geophysics |
spellingShingle |
Geophysics Chmel, Alexandre Smirnov, Victor Shcherbakov, Igor Hierarchy of non-extensive mechanical processes in fracturing sea ice |
topic_facet |
Geophysics |
description |
Abstract The fracture-induced oscillations in sea ice were detected by seismographs and seismic tiltmeters established on the Arctic ice pack. Field observations were supplemented with a laboratory experiment. The energy distributions in elastic waves generated during: (i) large-scale ice pack fragmentation over area of about 105 km2, (ii) local crack propagation in ice floe, and (iii) laboratory ice crashing were constructed and analyzed using principles of the Tsallis statistics. The energy release regimes at different stages of fracturing were characterized by the parameter of nonextensivity q. In terms of the non-extensive statistical mechanics, q > 1 evidences the correlated (non-extensive) dynamics of the process in nonequilibrium system, q = 1 responds to the additivity of events occurring in equilibrium system, and q < 1 takes place when the energy release is additive and limited by an upper cut-off. All these scenarios were revealed in fracture processes occurring at three hierarchic levels. The variation of the q-value demonstrates high thermodynamic changeability of the fracture process driven by irregular external source. The role of energy conservation in fracturing sea ice is discussed in connection with the observed reversible transitions between extensive and non-extensive modes of fracture. |
format |
Article in Journal/Newspaper |
author |
Chmel, Alexandre Smirnov, Victor Shcherbakov, Igor |
author_facet |
Chmel, Alexandre Smirnov, Victor Shcherbakov, Igor |
author_sort |
Chmel, Alexandre |
title |
Hierarchy of non-extensive mechanical processes in fracturing sea ice |
title_short |
Hierarchy of non-extensive mechanical processes in fracturing sea ice |
title_full |
Hierarchy of non-extensive mechanical processes in fracturing sea ice |
title_fullStr |
Hierarchy of non-extensive mechanical processes in fracturing sea ice |
title_full_unstemmed |
Hierarchy of non-extensive mechanical processes in fracturing sea ice |
title_sort |
hierarchy of non-extensive mechanical processes in fracturing sea ice |
publisher |
Walter de Gruyter GmbH |
publishDate |
2012 |
url |
http://dx.doi.org/10.2478/s11600-012-0029-5 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic ice pack Sea ice |
genre_facet |
Arctic ice pack Sea ice |
op_source |
Acta Geophysica volume 60, issue 3 ISSN 1895-7455 1895-6572 |
op_doi |
https://doi.org/10.2478/s11600-012-0029-5 |
container_title |
Acta Geophysica |
container_volume |
60 |
container_issue |
3 |
container_start_page |
719 |
op_container_end_page |
739 |
_version_ |
1766338385329258496 |