gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2023-14-2-0696gtcrust-1667Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSНЕРЕГУЛЯРНОСТИ В СМЕЩЕНИИ ГЕОГРАФИЧЕСКОГО ПОЛЮСА ЗЕМЛИ И ДЖЕРКИ В ГЕОМАГНИТНОМ ПОЛЕIRREGULARITIES IN THE DISPLACEMENT OF THE EARTH’S GEOGRAPHIC POLE AND JERKS IN THE GEOMAGNETIC FIELDhttps://orcid.org/0000-0003-1009-2327КурбасоваГ. С.KurbasovaG. S.

298688, пгт Кацивели, ул. Шулейкина, 1, Республика Крым

1 Shuleykin St, Katsiveli 298688, Republic of Crimea

https://orcid.org/0000-0002-3839-3466ВольвачА. Е.VolvachA. E.

298688, пгт Кацивели, ул. Шулейкина, 1, Республика Крым

1 Shuleykin St, Katsiveli 298688, Republic of Crimea

Крымская астрофизическая обсерватория РАНРоссияCrimean Astrophysical Observatory, Russian Academy of SciencesRussian Federation202319042023142696696Copyright © Курбасова Г.С., Вольвач А.Е., 20232023Курбасова Г.С., Вольвач А.Е.Kurbasova G.S., Volvach A.E.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/1667

Приведены результаты анализа некоторых нерегулярностей в сериях координат смещения по поверхности Земли географического Северного полюса c целью установления временной связи их появления с некоторыми глобальными джерками в геомагнитном поле. В расчетах использовались среднесуточные данные о движении Северного полюса Международной службы вращения Земли (IERS) с 1962 по 2021 г., а также информация о появлении глобальных джерков в геомагнитном поле на всех магнитных обсерваториях земного шара. Для выявления и анализа нерегулярностей в движении полюса по поверхности Земли использовались методы Фурье и вейвлет-анализа временных рядов, методы определения порога фиксированной формы и минимаксный в процедуре анализа негауссовского шума, методы фазового и псевдофазового пространства, а также стробоскопический метод построения отображения Пуанкаре.

Анализ локальных спектров Фурье и вейвлет-спектров выявляет нерегулярности в смещении Северного полюса по поверхности Земли на интервалах времени: 1967.04.09 – 1967.11.30, 1974.03.29 – 1974.09.12, 2005.11.03 –2006.03.07 гг., сопоставимые с появлением глобальных джерков в 1969, 1978 гг. и локального джерка в 2005 г. Полагается, что энергетические перестройки, вызвавшие кратковременные отклонения смещения полюса от траектории и возвращение на прежнюю траекторию в точках возврата, связаны с особенностями взаимодействия колебаний в процессе вращательно-поступательного движения Земли в Солнечной системе. Время появления особых точек на графиках смещения полюса по поверхности Земли в 1967 и 1974 гг. опережает время появления глобальных джерков в геомагнитном поле.

There are presented the results of analysis of some irregularities in the series of displacement coordinates on the Earth’s surface for the geographic North Pole in order to relate them temporally to some global jerks in the geomagnetic field. The calculations were made using the International Earth Rotation and Reference Systems Service (IERS) data on the average daily motions of the North Pole from 1962 to 2021 and the information on global jerks in the geomagnetic field measured by the magnetic observatories throughout the world. The identification and analysis of the irregularities in the pole displacement along the Earth’s surface were performed by the Fourier Method and wavelet methods for time series analysis, methods of fixed threshold determination and minimax analysis of the non-Gaussian noise, phase and pseudo-phase space methods, and stroboscopic methods of construction of Poincare maps.

The analysis of local Fourier spectra and wavelet-spectra reveals irregularities in the displacement of the North Pole in the time intervals from 1967.04.09 to 1967.11.30, from 1974.03.29 to 1974.09.12, and from 2005.11.03 to 2006.03.07. It is supposed that energy reconstructions which caused short-term pole deviations from the trajectory and starting to follow its previous trajectory at the return points are related to the specific features of oscillatory interactions in the process of the translational-rotational motion of the Earth’s in the Solar System. The time of marking specific points on graphs of the displacement of the pole along the surface of the Earth in 1967 and 1974 is ahead of global geomagnetic jerk occurrence times.

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The authors declare that there are no conflicts of interest present.