| Date: | 2009-02-20 01:30:00 | |
| Sender: | Richard Gross <Richard Gross <Richard.Gross@jpl.nasa.gov>> | |
| Subject: | [SLR-Mail] No. 1755: Earth Rotation Session at IAG Scientific Assembly | |
| Author: | Richard Gross | |
| Content: | ******************************************************************************** SLR Electronic Mail 2009-02-20 01:30:00 UTC Message No. 1755 ******************************************************************************** Author: Richard Gross Subject: Earth Rotation Session at IAG Scientific Assembly Subject: Earth Rotation Session at IAG Scientific Assembly Subject: Earth Rotation Session at IAG Scientific Assembly Dear Colleagues - As part of the IAG Scientific Assembly that will be held in Buenos Aires, Argentina during 31 August 2009 - 4 September 2009 there will be a session on ”Rotation of the Planet Earth”. The description of the session is given below. On behalf of the conveners I would like to draw your attention to this session and encourage you to participate in it. More information about the IAG Scientific Assembly can be obtained from its web site at Please note that the deadline for submitting abstracts is 6 March 2009. Hope to see you in Buenos Aires! Best regards, Richard .......................................................... SUB-SESSION 3.1: Rotation of the Planet Earth Convenors: Richard Gross (Jet Propulsion Laboratory, USA; Richard.Gross@jpl.nasa.gov) Rodrigo Abarca del Rio (Universidad de Concepción, Chile; roabarca@udec.cl) The Earth rotates about its axis once a day, but does not do so uniformly. Instead, the rate of rotation fluctuates by up to a millisecond per day, and the Earth wobbles as it rotates. Much like the wobble of an unbalanced automobile tire, the Earth wobbles because the mass of the Earth is not balanced about its rotation axis. Because the Earth is a dynamic system with its mass in constant motion, be it the mass of the atmosphere, oceans, crust, mantle, or core, the rotation of the Earth is constantly changing. And these changes occur over a wide range of time scales, from subdaily to decadal and longer. Measurements of the Earth´s changing rotation can therefore be used to gain greater understanding of mass transport within the entire Earth system, from tracking water in its various phases as it cycles through the atmosphere, oceans, and land, to crustal deformation associated with tectonic motions and glacial isostatic adjustment, to torsional oscillations of the core. This session will be a forum for discussing Earth rotation measurements including improvements that have been made to them over the last few decades, prospects for making future improvements in light of new space missions and techniques, and their use in observing and interpreting mass transport in the Earth system. ........................................................... From: Richard Gross ******************************************************************************** |