Lehmann discontinuity and shear wave anisotropy

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verdigris
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What do geophysicists mean by depth variation in the shear wave anisotropy of the Lehman discontinuity? And why is there none under the oceans but some under the continents?
 
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you seem to have a new question every five minutes.

anisotropy basically means that the waves travel faster in different directions. shear waves (or s-waves) are a type of seismic wave, there are twoo types of elastic wave, siwaves are slower than p-waves.
s-wave anisotropy has something to do with the speed s-waves travel at different angles (like they might travel faster going sideways than going upwards for example).