Earth Tides and Geodynamics

Chair: Carla Braitenberg (University of Trieste, Trieste, Italy)

Vice-Chair: Severine Rosat (University of Strasbourg, France)

Objectives

• 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 tides on the planets; 
• to study the effects of ocean loading and global water distribution; 
• 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 (superconducting, MEMS as well as traditional spring instruments) ;
• to promote interdisciplinary research in Earth and planetary tides; 
• to support the IAG Global Geodetic Observing System (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.