Abstract:

We calculated Bouguer gravity anomaly and free air gravity anomaly of the Antarctic region by using OSU91A potential model, and analyzed the cautions of the acute change of the free air anomaly and the correlation between the free air anomaly and height. Additionally,we calculated the ice thickness and the crustal thickness using free air anomaly data by means of the method of multi layer invertion which has been given by us.The results show that thicker ice region locates in eastern Antarctic region. The large undulation of crustal thickness concentrates in eastern Antarctic region, the thickest is 56km,and the thickness in western Antarctic region is thinner, about 8 km.