[IGSMAIL-6335] Earth Rotation Session at IUGG

[Gross, Richard S (335N)]

Author: Richard Gross

Dear Colleagues -

As part of the XXV General Assembly of the IUGG that will be held in Melbourne, Australia during 28 June 2011 to 07 July 2011 there will be an IAG Symposium on "Monitoring and Modeling Earth Rotation". The description of the Symposium is given below.

On behalf of the conveners I would like to draw your attention to this Symposium and encourage you to participate in it. We are developing a rich symposium that will be a forum for discussing the monitoring and modelling of the Earth’s rotation and the use of Earth rotation measurements to further our understanding of the Earth’s complex, interacting systems. We hope that you will be able to join us in Melbourne for this exciting symposium. More information about the XXV General Assembly of the IUGG can be obtained from its web site at <http://www.iugg2011.com/default.asp>.

Please note that the deadline for submitting abstracts is 01 February 2011.

Hope to see you in Melbourne!

Best regards,
Richard

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G03:  Monitoring and Modeling Earth Rotation

The Earth’s rotation is highly irregular. It varies on all observable time scales, from subdaily to decadal and longer. The gravitational attraction of the Sun, Moon, and planets causes the Earth to precess and nutate in space and, by periodically deforming the solid and fluid parts of the Earth, causes periodic changes in the Earth’s rate of rotation and wobble. Torques acting on the solid Earth associated with the transport of mass within the Earth’s atmosphere, hydrosphere, oceans, and core also change the Earth’s rotation as does mass displacement occurring within the solid Earth caused by earthquakes and other tectonic and non-tectonic motions like glacial isostatic adjustment. Measurements of the Earth’s rotation can therefore be used to gain greater understanding of a wide variety of geophysical and geodynamical processes. Astrometric measurements of the Earth’s changing length-of-day have been available since the middle 1600s and of the Earth’s wobble since the late 1800s. The development of the space-geodetic measurement techniques of lunar and satellite laser ranging (LLR and SLR), very long baseline interferometry (VLBI), global navigation satellite systems (GNSS), and Doppler orbitography and radio positioning integrated by satellite (DORIS) starting in the late 1960s revolutionized the accuracy, temporal resolution, and latency of Earth rotation measurements, a revolution that continues today with the availability of new GNSS constellations and signals and the development of new generation LLR, SLR, and VLBI stations. This symposium will be a forum for discussing the monitoring and modelling of the Earth’s rotation and the use of Earth rotation measurements to further our understanding of the Earth’s complex, interacting systems.

Conveners;

Richard Gross
Jet Propulsion Laboratory
Pasadena, Calif., USA
richard.gross at jpl.nasa.gov

Harald Schuh
Vienna University of Technology
Wien, Austria
harald.schuh at tuwien.ac.at

Oleg Titov
Geoscience Australia
Canberra, Australia
Oleg.Titov at ga.gov.au

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