0510922 - ASÚ 2020 RIV CZ eng J - Článek v odborném periodiku
Vondrák, Jan - Ron, Cyril
New GFZ effective angular momentum excitation functions and their impact on nutation.
Acta geodynamica et geomaterialia. Roč. 16, č. 2 (2019), s. 151-155. ISSN 1214-9705. E-ISSN 2336-4351
Institucionální podpora: RVO:67985815
Klíčová slova: rotation of the Earth * geophysical excitations * geomagnetic jerks
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 1.227, rok: 2019
Způsob publikování: Open access

Recently the Earth System Modelling Group of GeoForschungsZentrum (ESMGFZ) in Potsdam started producing a new series of Effective Angular Momentum Excitation Functions (EAM). As a novelty, the data is given in 3-hour resolution for the influence of the atmosphere and dynamic ocean, and 1-day resolution for terrestrial hydrosphere and barystatic sea-level changes. In addition to this, IERS recently started publishing their new series of C04 solution for Earth Orientation Parameters (EOP), based on new combination of all observations and ITRF2014 terrestrial frame. We use the ESMGFZ data to numerically integrate Brzeziński’s broad-band Liouville equations in celestial frame and compare the results with IERS C04 solution for celestial pole offsets in the interval 1986.0-2018.4. Alternatively, we also add a possible influence of unevenly distributed Geomagnetic jerks (GMJ).
Trvalý link: http://hdl.handle.net/11104/0301286