Earth Tides and Geodynamics

Chair: Séverine Rosat (University of Strasbourg, France)

Vice-Chair: Xiaoming Cui (Chinese Academy of Science, State Key Laboratory of Geodesy and Earth's Dynamics, Wuhan, China)


Objectives of SC 3.1 include:
  • to study and implement new observational techniques and improve existing ones, including clinometric and extensometric techniques;
  • to demonstrate the importance of long term geodetic stations;
  • to predict the signals observable with space geodetic techniques based on high precision terrestrial long term time series;
  • to advance tidal data analyses and prediction methods;
  • to enhance the models on the interaction among solid Earth, ocean, and atmospheric tides;
  • to research the effects of the atmosphere and hydrology on gravity and other geodetic observations;
  • to study the response of the Earth at tidal and non-tidal forcing frequencies;
  • to study the interplay between tides and Earth rotation;
  • to study the effects of ocean loading and global water distribution;
  • to study the seismic cycle in terms of deformation and normal modes;
  • to establish and coordinate working groups on specific topics of interest and relevancy to the understanding of our planet;
  • to develop, coordinate and promote international conferences, programs and workshops on data acquisition, analysis and interpretation related to the research fields mentioned above;
  • to contribute to the definition and realization of the International Terrestrial Reference Frame via advanced geodynamic models at global, regional and local scales;
  • to promote the systematic calibration and intercomparison of absolute and relative gravimeters (FG5, atomic gravimeter, SGs, MEMS as well as traditional spring instruments);
  • to study planetary tides and dynamics;
  • to promote interdisciplinary research in Earth and planetology;
  • to support the GGOS in the field of:
    • the integral effect on Earth rotation of all angular momentum exchanges inside the Earth, between land, ice, hydrosphere and atmosphere, and between the Earth, Sun, Moon, and planets,
    • the geometric shape of the Earth's surface (solid Earth, ice and oceans), globally or regionally, and its temporal variations, whether they are horizontal or vertical, secular, periodical or sudden,
    • the Earth's gravity field-stationary and time variable mass balance, fluxes and circulation. 

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