## Abstract

Wavelet-based analysis of the Earth rotation speed (Ers) time series highlighted various periods in speed oscillation induced by tidal forces. Auto- and cross-correlation analyses of many years Ers variation and changes in some oceanographic and biotic processes have shown either direct or inverse relation between the studied processes at certain phase shift s. There were found persistent cross-correlation links between the Ers and the population dynamics of halibut (r = 0,79). Herring abundance and the Ers have had a maximum cross-correlation coefficient r = 0,65 at the 2-year shift relative to Ers. Fluctuation in the pollock abundance is inversely proportional to variation of the Ers (r = -0,64) at the phase lag 3 years. A hypothesis is stated and hydrodynamically interpreted with respect to possible mechanisms of processes variability due to fluctuations of the Ers, associated with the action of Coriolis force which determines many dynamic and thermodynamic processes in the ocean and atmosphere. We received an analytical solution of motion equations to describe the balance between the inertial force and the Coriolis force, as a linear approximation. The solution shows that increasing amplitude vibrations lose dynamic stability under certain circumstances and transform into large-scale vortices, determining appropriate mass transport and properties. Inertial flow will contain the same harmonics as the rotation of the Earth, and hence the transport (advection) of the properties will have the same frequency of excitation as the rotation of the Earth.

Translated title of the contribution | Dependence of physical and biotic processes variability in the ocean on Earth rotation speed |
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Original language | Russian |

Pages (from-to) | 129-134 |

Number of pages | 6 |

Journal | ВЕСТНИК САНКТ-ПЕТЕРБУРГСКОГО УНИВЕРСИТЕТА. СЕРИЯ 7: ГЕОЛОГИЯ, ГЕОГРАФИЯ |

Issue number | 2 |

Publication status | Published - 2013 |

## Scopus subject areas

- Geology
- Earth and Planetary Sciences(all)