Why the continental margin around the Antarctica is deeper than other continental shelves ?

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The growth and decay history of Antarctic ice sheet affected geographic formation of the Antarctica including its margin through the Cenozoic era. The depth of the continental shelf around the Antarctica is very deep in comparison with that of the other sea areas in the world. The reason why continental shelf of Antarctica is very deep is that the Antarctic ice sheet would depress the continent including the continental shelf. Based on the glacial isostatic adjustment (GIA) modelling, we estimate the effect of the Antarctic ice load on the depth of the continental shelf around the Antarctica. GIA modelling results show that deformation due to the present ice distribution cannot satisfy the anomaly of the continental shelf depths in this region. However, the results based on the ice load model including the last glacial cycle explain the depth around the Antarctica, and imply that the Antarctic ice sheet extent to continental shelf at the Last Glacial Maximum.