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| Titel |
Variability of scaling time series in the Arctic sea-ice drift dynamics |
| VerfasserIn |
A. Chmel, V. N. Smirnov, I. B. Sheikin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1812-0784
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| Digitales Dokument |
URL |
| Erschienen |
In: Ocean Science ; 6, no. 1 ; Nr. 6, no. 1 (2010-02-09), S.211-217 |
| Datensatznummer |
250003354
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| Publikation (Nr.) |
 copernicus.org/os-6-211-2010.pdf |
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| Zusammenfassung |
| The motion of an individual ice floe in the Arctic Ocean was
monitored at the Russian research station North Pole 35 established
on the ice pack in 2008. The ice floe speed (V) was found to be
correlated with wind speed (v) in main features, such as the
positions of maxima and minima of V and v. However, the fine
structure of the V-variation cannot be explained by the wind
forcing alone. There were periods of time when the floe drift was
affected by the interactions of ice floes between each other or by
the periodical forcing due to either the Coriolis inertia effect or
the tidal activity. These data were compared with the "waiting
times" statistics that are the distributions of time intervals
between subsequent, sufficiently strong changes in the kinetic
energy of drifting ice floe. These distributions were measured in
several time windows differing in the average wind speed and wind
direction, and/or in the mechanical state of the ice pack. The
distribution functions N (t>τ), where N is the number of
successive events of energy change separated by the time interval
t that exceeds τ, constructed in different time windows
demonstrate fractal or a multifractal nature of the time series
during motion in the consolidated ice pack but were truly random
when the ice floe drifted in the highly fragmented sea ice. The
latter result shows the existence of a relationship between the
long-range mechanical interactions in the pack and long-term memory
(time scaling behaviour) of the sea-ice motion. |
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