Difference between revisions of "Earth's Rotation, Shape and Gravity"
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==Abstract== | ==Abstract== | ||
| − | <em>Meeting held in Nice, France, 6 - 11 April 2003.</em> The expanding Earth view is adopted, with the aim to show the links Earth's rotation, time-varying gravity, expansion, can present in shaping our planet. An increasing gravity - whatever the reason may be - must induce an additional J2 variation, towards a decreasing ellipticity. The same effect, in different magnitude order, could be produced by the slow decay of the well know equatorial ca. 100 m. excess flatness of the Earth - due probably to a faster paleo-spin. The combination of these two effects can cause both misinterpretation of some phenomena like the alleged glacial-rebound, and difficulty to recognise the probably small amount (few mm/yr or fraction of mm/yr) of Recent global expansion. The need for a varying Earth's gravity is envisaged as a consequence of an expanding Earth due to cosmological causes, having some signatures in geological records and astrophysical large-scale structure dynamics. Finally the expansion of the Earth - and then an increasing gravity - finds a new support in the forecast of an oscillating path of the True Polar Wander, which has been already observed. | + | <em>Meeting held in Nice, France, 6 - 11 April 2003.</em> The expanding Earth view is adopted, with the aim to show the links Earth's rotation, time-varying gravity, expansion, can present in shaping our planet. An increasing gravity - whatever the reason may be - must induce an additional J2 variation, towards a decreasing ellipticity. The same effect, in different magnitude order, could be produced by the slow decay of the well know equatorial ca. 100 m. excess flatness of the Earth - due probably to a faster paleo-spin. The combination of these two effects can cause both misinterpretation of some phenomena like the alleged glacial-rebound, and difficulty to recognise the probably small amount (few mm/yr or fraction of mm/yr) of Recent global expansion. The need for a varying Earth's gravity is envisaged as a consequence of an expanding Earth due to cosmological causes, having some signatures in geological records and astrophysical large-scale structure dynamics. Finally the expansion of the Earth - and then an increasing gravity - finds a new support in the forecast of an oscillating path of the True Polar Wander, which has been already observed. |
| − | [[Category:Gravity]] | + | [[Category:Scientific Paper|earth 's rotation shape gravity]] |
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| + | [[Category:Gravity|earth 's rotation shape gravity]] | ||
Latest revision as of 19:28, 1 January 2017
| Scientific Paper | |
|---|---|
| Title | Earth\'s Rotation, Shape and Gravity |
| Author(s) | Giancarlo Scalera |
| Keywords | {{{keywords}}} |
| Published | 2003 |
| Journal | None |
Abstract
Meeting held in Nice, France, 6 - 11 April 2003. The expanding Earth view is adopted, with the aim to show the links Earth's rotation, time-varying gravity, expansion, can present in shaping our planet. An increasing gravity - whatever the reason may be - must induce an additional J2 variation, towards a decreasing ellipticity. The same effect, in different magnitude order, could be produced by the slow decay of the well know equatorial ca. 100 m. excess flatness of the Earth - due probably to a faster paleo-spin. The combination of these two effects can cause both misinterpretation of some phenomena like the alleged glacial-rebound, and difficulty to recognise the probably small amount (few mm/yr or fraction of mm/yr) of Recent global expansion. The need for a varying Earth's gravity is envisaged as a consequence of an expanding Earth due to cosmological causes, having some signatures in geological records and astrophysical large-scale structure dynamics. Finally the expansion of the Earth - and then an increasing gravity - finds a new support in the forecast of an oscillating path of the True Polar Wander, which has been already observed.
