| Title | Scaling aspects of the sea-ice-drift dynamics and pack fracture |
| Author | Chmel, A.; Smirnov, V.N.; Panov, L.V. |
| Author Affil | Chmel, A., Russian Academy of Sciences, Ioffe Physico-Technical Institute, Saint Petersburg, Russian Federation. Other: Arctic and Antarctic Research Institute, Russian Federation |
| Source | Ocean Science, 3(2), p.291-298, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1812- 0784 |
| Publication Date | 2007 |
| Notes | In English. Published in Ocean Science Discussions: 30 January 2007, http://www.ocean-sci- discuss.net/4/107/2007/osd-4-107-2007.html; accessed in May, 2009. 21 refs. GeoRef Acc. No: 296689 |
| Index Terms | atmospheric pressure; climatic change; fractals; fracturing; glacial geology; ice; ice sheets; analysis (mathematics); oscillations; remote sensing; shear strain; statistical analysis; Arctic Ocean; Arctic region; acceleration; climate change; littoral drift; mathematical methods; monitoring; power law; satellite methods; sea ice; shear; temporal distribution; time series analysis; winds |
| Abstract | A study of the sea-ice dynamics in the periods of time prior to and during the cycles of basin-wide fragmentation of the ice cover in the Arctic Ocean is presented. The fractal geometry of the ice-sheets limited by leads and ridges was assessed using the satellite images, while the data on the correlated sea- ice motion were obtained in the research stations "North Pole 32" and "North Pole 33" established on the ice pack. The revealed decrease of the fractal dimension as a result of large-scale fragmentation is consistent with the localization of the fracture process (leads propagation). At the same time, the scaling properties of the distribution of amplitudes of ice-fields accelerations were insensitive to the event of sea-ice fragmentation. The temporal distribution of the accelerations was scale-invariant during "quiet" periods of sea-ice drift but disordered in the period of mechanical perturbation. The period of decorrelated (in time) ice-field motion during the important fracture event was interpreted as an inter- level transition in the hierarchic dynamical system. The mechanism of the long-range correlations in the sea-ice cover, including the fracture process, is suggested to be in relation with the self-organized oscillation dynamics inherent in the ice pack. |
| URL | http://www.ocean-sci.net/3/291/2007/os-3-291-2007.pdf |
| Publication Type | journal article |
| Record ID | 64001493 |