CVM Improvement
There is interest in whether CVM-S and CVM-H models are converging through full 3D tomography work of Chen and Tape.
To look into this issue, we propose a plan to compare the models in a number of ways.
We will use the CVM-S4 region down to 100km depth (see kml file below for exact coordinates) because both models provide Vp, Vs, and density (rho) for this region, at 1km spacing. If the area is approximately 200km x 300km x 100km = 6,000,000 mesh points.
We will use UCVM software to extract low resolutions (1km) meshes using CVM-S4 and CVM-SI9.
For each parameter Vp, Vs, and density, we will create difference meshes, then plot slices and possibly volumes.
For CVM-H, the current release notes for CVM-H say that version 5.5 (Sept 2008) was the last version of CVM-H without Carl Tape inversion results. It also says that CVM-H 6.0 was first with inversion results. We propose to use these two versions (if we can find a distribution of them) of CVM-H as the starting and original models. This assumes we only want to examine inversion improvements. CVM-H has also recently added a basin based on a Graves paper. This is a CVM-H improvement, but not based on tomographic results.
We also make a difference meshes between CVM-S4 and CVM-H 5.5 starting models and CVM-SI9 and CVM-H 6.0 improved models. If the overall difference between CVM-S and CVM-H is lower when we compare the difference of original models and difference of improved models, this provides evidence that the models are converging.
UCVM Regions KML File
