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UNAVCO IDV: Mantle Convection
The UNAVCO IDV is an excellent way to show and explore mantle convection models, in map or globe views, with time animation. The IDV provides vertical and horizontal cross-sections, vertical probes, flow vectors, and isosurfaces.

The IDV can display several parameters at once, such as temperature, composition parameters (scalars), flow (vectors), and surface gravity anomalies,seismic tomography isosurfaces, and geoid heights. Full controls on color scales, transparency, and time animation are included. You can save images and movies in several formats. Ypou can label and annotate images and add legends.

Mantle Convection Models (below)

Data Formats (below)

You might be interested in Tectonic Plates and Plate Velocity Vectors in the IDV


Mantle Convection

Allen McNamara of Arizona State University. provided the mantle convection model output used in these examples, in 2006. These views may not represent his more recent models.

To more learn about exploring 3D model grids with the UNAVCO IDV, and the NetCDF data format, see

Visualizing and Analysing Seismic Tomography with the IDV

Using the NetCDF data format for seismic tomography and other 2D and 3D Grids

For a lot more detail about NetCDf and the UNAVCO IDV, NetCDF Data for the UNAVCO IDV

Sample IDV Displays of Mantle Convection


McNamara model, world temperatures at 75 km depth, present time


McNamara model, world temperatures at 75 km depth, 170 Ma

MOVIE of McNamara model, world temperatures at 75 km depth, 170 Ma to present, animated gif

MOVIE of McNamara model, world temperatures at 75 km depth, 170 Ma to present, Quicktime



Mantle cross section, along equator, of temperature.

Temperature scale is a fraction of core-mantle boundary (high) temperature. Note regions of cold material in deep mantle, and vertical hot 'plumes.'

MOVIE: Quicktime movie

MOVIE: animated gif movie



Mantle temperatures 2D vertical cross section

Temperature scale same as previous, a fraction of core-mantle boundary (high) temperature. Note regions of cold material in deep mantle, and vertical hot 'plumes.' 170 Ma.



McNamara convection model: mantle temperature isosurface at 55% of core-mantle temperature; movie
170 Ma to present.
Quicktime movie



3D oblique view of Mantle temperature isosurface and vertical cross-section of temperature

Temperature scale of 1.0 to 0.0 is fraction of core-mantle boundary (high) temperature. Note regions of cold material in deep mantle, and vertical hot 'plumes.'



color image of global temperatures at single depth

Quicktime movie
animated gif movie




Quicktime movie of "sinkers"


Data Formats for Mantle Convection Models in the UNAVCO IDV - how to put your data in the UNAVCO IDV

For 3D grids in the IDV use NetCDF files. You can find lots of details about NetCDF in our NetCDF web page.

And see Using the UNAVCO IDV to explore seismic tomography and mantle convection models

Here is a sample NetCDF CDL file for a 3D grid of the mantle. This particular example has grid points at very degree and 48 depths, for one parameter and one time. The long array "grid_values" has been truncated only to save the space for 3,136,368 values in this example file. All of these choices can be modified. Use this file as a template to make your own ASCII CDL files. Then use the NetCDF processor "ncgen" to make the binary NetCDF file for the IDV.


Last modified: Saturday, 12-Dec-2015 04:44:38 UTC

 

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