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Geophysical fluids, geomagnetic jerks, and their impact on Earth orientation
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SYSNO ASEP 0486689 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Geophysical fluids, geomagnetic jerks, and their impact on Earth orientation Author(s) Vondrák, Jan (ASU-R) RID, ORCID
Ron, Cyril (ASU-R) RID, ORCIDSource Title Publications of the Astronomical Observatory of Belgrade. - : Astronomical Observatory of Belgrade - ISSN 0373-3742
Roč. 96, č. 1 (2017), s. 51-60Number of pages 10 s. Publication form Print - P Action National Conference of Astronomers of Serbia /17./ Event date 23.09.2014 - 27.09.2014 VEvent location Belgrade Country RS - Serbia Event type EUR Language eng - English Country RS - Serbia Keywords Earth orientation ; geophysical fluids ; geomagnetic jerks Subject RIV DE - Earth Magnetism, Geodesy, Geography OECD category Physical geography R&D Projects GA13-15943S GA ČR - Czech Science Foundation (CSF) Institutional support ASU-R - RVO:67985815 Annotation We introduce a simple continuous excitation function (having a ”double ramp”, or triangular, shape), centered on the epochs of geomagnetic jerks, and estimate its amplitude to fit best the integrated pole positions to its observed positions. The combined results of numerical integration of atmospheric/oceanic excitations plus this newly introduced excitation are then compared with the observed celestial pole offsets. The comparison shows that this approach improves the agreement between the two time series significantly. Workplace Astronomical Institute Contact Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Year of Publishing 2018
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