LONG WAVELENGTH TOPOGRAPHY, SEA-FLOOR SUBSIDENCE AND FLATTENING

被引：27

作者：

CAZENAVE, A

LAGO, B

机构：

[1] Groupe de Recherche de Géodésie Spatiale, Centre National D'etudes Spatiales, Toulouse

来源：

GEOPHYSICAL RESEARCH LETTERS | 1991年 / 18卷 / 07期

关键词：

D O I：

10.1029/91GL01605

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Seafloor subsidence effects due to cooling of the oceanic lithosphere have been removed from bathymetry data. The corrected ocean floor topography presents long wavelength highs, in particular over western Pacific. We show in this study that this long wavelength residual topography can be interpreted as either a term of seafloor flattening at old ages or a dynamic response to large-scale convection. Whatever its origin, this long wavelength residual topography is dominated by a degree 2 pattern highly correlated with geoid, lower mantle heterogeneities and plate age.

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页码：1257 / 1260

页数：4

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