Inner core differential rotation (2) Inner core differential rotation values:

From seismic data, free oscillation data, model

• 1.1 degree/year Song & Richards, 1996
• 3.0 degree/year Su et al., 1996
• 0.2 degree/year Creager, 1997
• at limit of data Souriau et al., 1997
• < 0.1 deg/year Souriau & Poupinet, 2000
• [0.1,1.1] deg/year Song, 2000
• 0.0 degree/year Isse & Nakanishi, 2000
• 0.1 degree/year Vidale et al., 2000
• 0.0 degree/year Laske & Master, 1999
• 0.0 degree/year Laske et al., 2000
• 0.02 degree/year Buffett & Glatzmaier,2000