Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. In a continental setting, the Ganges foreland basin has formed by flexure of the. One print or electronic copy may be made for personal use only. This paper was published in Journal of Geophysical Research : Solid Earth and is made available as an electronic reprint (preprint) with permission of American Geophysical Union (AGU).
All isostatic models underpredict the spectra at 2 < n < 12 and so we interpret the low‐order Earth's gravity field as caused, at least in part, by nonisostatic processes due to dynamic motions such as those associated with convective upwellings and downwellings in Earth's mantle. Power spectra reveal that the gravity effect of topography and its flexural compensation contribute significantly to the observed free‐air gravity anomaly spectra for spherical harmonic degree 33 400) and lower (n < 33) degrees, but topography appears either uncompensated or fully compensated at these degrees, irrespective of the actual Te. We have used spherical harmonic coefficients that describe Earth's gravity anomaly and topography fields to quantify the role of isostasy in contributing to crustal and upper mantle structure. Journal of Geophysical Research: Solid Earth Journal of Geophysical Research : Solid Earth, 122(10), 8417-8430. Flexural Isostasy : Constraints From Gravity and Topography Power Spectra. By comparing observations of flexure in the region of long-term loads such as ice, sediment. Flexural Isostasy : Constraints From Gravity and Topography Power Spectra the lithosphere, Te (see Watts, 2001 and references therein).
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