Figure 7.18: Inverse (reciprocal) of bubble to bubble scattering length, 1 /Lscat = rwrr2, in Antarctic ice as a function of depth. The data from the Vostok (x) and Byrd (V) sites are from microscopic examinations, those from AMANDA (•, o) are from in-situ measurements. The full circles assume forward scattering from smooth-walled bubbles, the open circles isotropic scattering from rough-walled bubbles. The hydrostatic pressure curve shows the effect of bubble shrinkage at constant concentration. The other curves axe the results of calculations and show the effect caused by a decreasing bubble concentration as a function depth (and time) due to H20 molecule diffusion through air hydrate crystal walls (after Price, 1995).

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