An explanation for the shape of Earth's gravity spectrum based on viscous mantle flow models

Details An explanation for the shape of Earth's gravity spectrum based on viscous mantle flow models An explanation for the shape of Earth's gravity spectrum based on viscous mantle flow models

Nov 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29u..15s&link_type=abstract

Geophysical Research Letters, Volume 29, Issue 21, pp. 15-1, CiteID 2019, DOI 10.1029/2002GL015476

Physics

2

Geodesy And Gravity: Earth'S Interior-Dynamics (8115, 8120), Tectonophysics: Dynamics Of Lithosphere And Mantle-General, Tectonophysics: Dynamics, Gravity And Tectonics, Convection Currents And Mantle Plumes, Tectonophysics: Rheology-Mantle

Scientific paper

The Earth's gravity spectrum can be used as an observational constraint on geophysical modelling. Here we show how the spectrum up to degree l = 31 can be explained to a large part by viscous mantle flow in combination with a very simple model of random mantle density anomalies. Efforts to make the calculation more ``realistic'' by considering effects of thermal boundary layers, or using density anomalies based on tomography, or geodynamic modelling, tend to worsen the fit. Results are rather sensitive to assumptions on density anomalies in the upper thermal boundary layer. We suggest that, in combination with other observations, the shape of the Earth's gravity spectrum can serve to better constrain radial viscosity structure, density anomalies and flow in the Earth's mantle. Appropriate treatment of the lithosphere and of lateral viscosity variations will be the main challenges in modelling this spectrum.

Affiliated with

Also associated with

No associations

Rating

An explanation for the shape of Earth's gravity spectrum based on viscous mantle flow models does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An explanation for the shape of Earth's gravity spectrum based on viscous mantle flow models, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An explanation for the shape of Earth's gravity spectrum based on viscous mantle flow models will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-741298