Long-period nutational-precessional motions of the instantaneous Earth rotation pole
The influence of the rotational regime on real long-period nutational-precessional motions of the instantaneous pole of the Earth’s rotation is considered. The solar magnetospheric (through changes in the angular velocity of rotation) mechanism of action is discussed. The observed 12-month oscillati...
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| Language: | English |
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Kazan Federal University
2020-12-01
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| Series: | Учёные записки Казанского университета: Серия Физико-математические науки |
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| Online Access: | https://kpfu.ru/uz-eng-phm-2020-4-7.html |
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| author | V.Yu. Belashov E.S. Belashova O.A. Kharshiladze |
| author_facet | V.Yu. Belashov E.S. Belashova O.A. Kharshiladze |
| author_sort | V.Yu. Belashov |
| collection | DOAJ |
| description | The influence of the rotational regime on real long-period nutational-precessional motions of the instantaneous pole of the Earth’s rotation is considered. The solar magnetospheric (through changes in the angular velocity of rotation) mechanism of action is discussed. The observed 12-month oscillations of the instantaneous axis of rotation are explained by the influence of the deforming force arising when the angular velocity changes, which causes deformation of the figure that is not uniform in the longitudinal zones, without involving baric-circulation processes as an intermediate link. Thus, free (Chandler) and forced 12-month fluctuations of the pole position are considered from a single point of view, i.e., as resulting from the variability of the rotational regime of the Earth. The analysis of heliogeophysical data for 1900–2017 confirms the validity of the proposed relationship mechanism. |
| format | Article |
| id | doaj-art-cade5ea65b5d4b9fbbadaa9c9b22ef8b |
| institution | DOAJ |
| issn | 2541-7746 2500-2198 |
| language | English |
| publishDate | 2020-12-01 |
| publisher | Kazan Federal University |
| record_format | Article |
| series | Учёные записки Казанского университета: Серия Физико-математические науки |
| spelling | doaj-art-cade5ea65b5d4b9fbbadaa9c9b22ef8b2025-08-20T02:56:39ZengKazan Federal UniversityУчёные записки Казанского университета: Серия Физико-математические науки2541-77462500-21982020-12-01162446748010.26907/2541-7746.2020.4.467-480Long-period nutational-precessional motions of the instantaneous Earth rotation poleV.Yu. Belashov0E.S. Belashova1O.A. Kharshiladze2Kazan Federal University, Kazan, 420008 RussiaKazan National Research Technical University named after A.N. Tupolev, Kazan, 420111 RussiaIvane Javakhishvili Tbilisi State University, Tbilisi, 0179 GeorgiaThe influence of the rotational regime on real long-period nutational-precessional motions of the instantaneous pole of the Earth’s rotation is considered. The solar magnetospheric (through changes in the angular velocity of rotation) mechanism of action is discussed. The observed 12-month oscillations of the instantaneous axis of rotation are explained by the influence of the deforming force arising when the angular velocity changes, which causes deformation of the figure that is not uniform in the longitudinal zones, without involving baric-circulation processes as an intermediate link. Thus, free (Chandler) and forced 12-month fluctuations of the pole position are considered from a single point of view, i.e., as resulting from the variability of the rotational regime of the Earth. The analysis of heliogeophysical data for 1900–2017 confirms the validity of the proposed relationship mechanism.https://kpfu.ru/uz-eng-phm-2020-4-7.htmlearth rotationnutationprecessioninstantaneous pole of rotationearth figure deformationpole position fluctuationsfree oscillationsforced oscillationssolar magnetospheric control |
| spellingShingle | V.Yu. Belashov E.S. Belashova O.A. Kharshiladze Long-period nutational-precessional motions of the instantaneous Earth rotation pole Учёные записки Казанского университета: Серия Физико-математические науки earth rotation nutation precession instantaneous pole of rotation earth figure deformation pole position fluctuations free oscillations forced oscillations solar magnetospheric control |
| title | Long-period nutational-precessional motions of the instantaneous Earth rotation pole |
| title_full | Long-period nutational-precessional motions of the instantaneous Earth rotation pole |
| title_fullStr | Long-period nutational-precessional motions of the instantaneous Earth rotation pole |
| title_full_unstemmed | Long-period nutational-precessional motions of the instantaneous Earth rotation pole |
| title_short | Long-period nutational-precessional motions of the instantaneous Earth rotation pole |
| title_sort | long period nutational precessional motions of the instantaneous earth rotation pole |
| topic | earth rotation nutation precession instantaneous pole of rotation earth figure deformation pole position fluctuations free oscillations forced oscillations solar magnetospheric control |
| url | https://kpfu.ru/uz-eng-phm-2020-4-7.html |
| work_keys_str_mv | AT vyubelashov longperiodnutationalprecessionalmotionsoftheinstantaneousearthrotationpole AT esbelashova longperiodnutationalprecessionalmotionsoftheinstantaneousearthrotationpole AT oakharshiladze longperiodnutationalprecessionalmotionsoftheinstantaneousearthrotationpole |