Speaker: FANG Ming(MIT)

Time: December-2-2011 9:30-11:00AM　  2:30-4:30PM

Location: NO.2 Conference room.

Talk One:
How the Chandler Wobble is Excited by Rapid Variations in the Angular Momentum of the Fluid Earth

Summary:
Here I try to give a thorough explanation, if not "THE" thorough explanation of the physics of the
the Chandler Wobble (CW) excitation.  Topics includes minute-by-minute physics of the CW
excitation; the common origin of the spectrum broadening and the double peaks, so that
the estimate of the CW by half power point is invalidated; the ocean actually de-excites the CW
and the physics of why the ocean de-excites the CW by being out of phase with the atmosphere.

Talk Two:
Degree-1 Loadings from Outside In and from Inside Out

Summary:
Degree-1 surface loading that is responsible for geo-center shifts is frame-dependent. Ideal
loading Love numbers can be maintained by geodetic sites uniformly distributes
over the surface. But the realistic site distribution is highly non-uniform because of the ocean.
Here I give a new theory to treat the degree-1 loading by imperfect networks.
As for the loading from the CMB up, a competing mechanism between elastic restoring force
and the self-gravitation restoring force is discovered and analyzed. These result will have
important impact on extra-solar planets that are heavier than the Earth.