0510922 - ASÚ 2020 RIV CZ eng J - Journal Article
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
Institutional support: RVO:67985815
Keywords : rotation of the Earth * geophysical excitations * geomagnetic jerks
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 1.227, year: 2019 ; AIS: 0.215, rok: 2019
Method of publishing: Open access
DOI: https://doi.org/10.13168/AGG.2019.0012

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).
Permanent Link: http://hdl.handle.net/11104/0301286