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| Titel |
The b-value characterization of the critical sea-ice dynamics in the Arctic Ocean |
| VerfasserIn |
A. Chmel, V. N. Smirnov, S. M. Kovalev |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250020949
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| Zusammenfassung |
| A so-called b-value, which is generically derived from the Gutenberg-Richter law, is widely
used for the energy release characterization in the earthquake [1] and rock fracture [2]
studies. In the statistical interpretation, the energy distribution of geophysical events takes the
form N(> E) ∝ Eb, where N(> E) is the number of events with the energy greater than
E. This approach is also applicable for the characterization of the large-scale sea-ice
fragmentations occurring in the polar cap [3]. Since the sea-ice cover fragmentation in the
Arctic Ocean is mainly determined by the sea-ice drift dynamics, the parameters of
the energy exchange between moving sea-ice floes (including variations of the
exponent b) in combination with the temporal fractal characteristics are potentially
informative for estimation and, probably, prediction of the mechanical behavior of the
ice-pack.
Here we present the results of the field observations and the remote sensing technique
data related to the event of the multi-scale ice pack fragmentation occurred in the polar cap in
February 2008 and registered (locally) at the Russian ice-research station North Pole 35
established on the pack, and (spatially) in the NOAA satellite images. The physical processes
underlying the critical dynamics of the sea-ice motion prior to and during the sea-ice
fragmentation of geophysical scale are discussed from the viewpoint of the energy
conservation in the open system.
References
1. Enescu B. and Ito K. Tectonophys. 2001, 338, 297-314.
2. Zang, A., Wagner, F.C., Stanchits S., Dresen G., Andresen R. and Haidekker M.A.
Geophys. J. Intern. 1998, 135, 1113-1130.
3. Chmel A. and Smirnov V.N. In: “The Pacific and Arctic Ocean: New Oceanographic
Research” Ed. Kallen B. Tewles, Ch. 4. Nova Science Publishers, N.Y. 2008. |
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