Earth Rotation: Theoretical aspects, temporal variability, physical interpretation, and prediction
Convener:
Justyna Śliwińska-Bronowicz
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Co-conveners:
Sigrid Böhm,
Alberto Escapa,
David Salstein,
Florian Seitz
Orals
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Tue, 16 Apr, 10:45–12:30 (CEST) Room -2.91
Posters on site
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Attendance Tue, 16 Apr, 16:15–18:00 (CEST) | Display Tue, 16 Apr, 14:00–18:00 Hall X2
We are interested in the progress in the theory of Earth rotation. We seek contributions that are consistent internally with the accurate observations at the mm-level, to meet the requirements of Global Geodetic Observing System and respond to IAG 2019 Res. 5 and IAU 2021 Res. B2. We invite presentations within the scope of the IAU/IAG JWG Improving Theories and Models of the Earth’s Rotation.
We welcome contributions that highlight new determinations and analyses of Earth Orientation Parameters (EOP), including combinations of different geodetic and astrometric observational techniques for deriving UT1/length-of-day variations and polar motion. We welcome discussions of EOP solutions in conjunction with a consistent determination of terrestrial and celestial frames, as tackled in the IAG/IAU/IERS JWG Consistent Realization of TRF, CRF and EOP. We are interested in the latest achievements in EOP forecasting, especially reports exploring the potential of innovative techniques in improving forecast accuracy.
We invite contributions of both the dynamical basis for links between Earth rotation, geophysical fluids, and other geodetic quantities, such as the Earth gravity field or surface deformation, and of explanations for the physical excitations of Earth rotation. Besides tidal influences from outside the Earth, the principal causes for variable EOP appear to be related to angular momentum exchange from variable motions and mass redistribution of the fluid portions of the planet.
We welcome contributions about the relationship between EOP variability and the variability in fluids due to climate variation or global change signals. Forecasts of these quantities are important especially for the operational determination of EOP and the effort to improve predictions is an important topic. We also welcome input on the modeling, variability, and excitations of the rotation of other planetary bodies.
Session assets
10:45–10:50
5-minute convener introduction
10:50–11:00
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EGU24-4521
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On-site presentation
11:00–11:10
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EGU24-6342
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ECS
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On-site presentation
11:10–11:30
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EGU24-1271
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solicited
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Highlight
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On-site presentation
11:30–11:40
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EGU24-10644
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ECS
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On-site presentation
11:50–12:00
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EGU24-8834
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ECS
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Virtual presentation
12:00–12:10
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EGU24-18774
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On-site presentation
12:20–12:30
Discussion
Earth rotation theory, observations & prediction
X2.26
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EGU24-15752
Status of the update of the Earth's rotation theory and precession-nutation models
(withdrawn)
X2.27
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EGU24-9457
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ECS
Links between Earth rotation and geophysical processes
X2.37
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EGU24-11706
El Niño 2023-24: a rotational signature?
(withdrawn)