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Calculation of Terrain and Isostatic Gravity Effects in Antarctica and Its Surroundings
Author(s): 
Pages: 1-7
Year: Issue:  3
Journal: Hydrographic Surveying and Charting

Keyword:  terrain gravity effectsisostatic gravity effectsAntarcticaice sheetBouguer correctionisostatic correction;
Abstract: 使用BEDMAP2关于南极大陆及周围海域和JGP95E关于全球表面高程、冰厚和冰下及水深地形数据,采用球坐标系下的扇形球壳块重力效应公式,在极方位投影直角坐标网格节点上计算了南极大陆及周围海域的近区及远区的地形和艾黎均衡重力效应.南极大陆冰盖带来可观的正重力效应,南大洋负重力效应又影响到了南极内陆,全球地形/均衡重力效应与局部地形高低有关联性,而低负值区主要分布在环南极的陆坡.获得的约1n mile间距的地形和艾黎均衡重力效应网格数据可用于南极大陆及周边海域的重力改正,提供准确、一致的布格重力异常和艾黎均衡重力异常.
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