PROGRAMS.tar.gz - programs for obtaining model values at specific locations
and some GMT (http://gmt.soest.hawaii.edu) plotting tools.
GRD.tar.gz - longitude-latitude-velocity files with vsh, vsv, and voigt
average in km/s evaluated on a grid of points at many depths
in the mantle
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1-D MODELS:
STW105 - our new reference model, also known as REF
PREM750_CARDS - the PREM model
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3-D MODELS:
S362ANI - our preferred global model of shear-wave velocity. In this model,
radial anisotropy is confined to the uppermost mantle (that is,
since the anisotropy is parameterized with only the four uppermost
splines, it becomes very small below a depth of 250 km,
and vanishes at 410 km). The 1-D reference model is STW105.
S362WMANI - a version of S362ANI with anisotropy allowed throughout the mantle.
S362ANI_PREM - a version of S362ANI calculated using PREM as the
1-D reference model.
S362ANI_OLDCRCOR - a version of S362ANI calculated using linear Woodhouse & Dziewonski (1984)
crustal corrections and STW105.
S2.9EA - a global model with higher resolution in the upper mantle beneath
Eurasia calculated using STW105 as the 1-D reference model.
S2.9EA_OLDCRCOR - a version of S2.9EA calculated using linear Woodhouse & Dziewonski (1984)
crustal corrections and STW105.
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REFERENCES:
The reference for STW105 (REF) and for the global 3D models S362ANI, S362WMANI, and
S362ANI_PREM is:
Kustowski, B, Ekstrom, G., and A. M. Dziewonski, 2008,
Anisotropic shear-wave velocity structure of the Earth's mantle: A global model,
J. Geophys. Res., 113, B06306, doi:10.1029/2007JB005169.
The reference for the model of Eurasia S2.9EA is:
Kustowski, B., Ekstrom, G., and A. M. Dziewonski, 2008,
The shear-wave velocity structure in the upper mantle beneath Eurasia,
Geophys. J. Int, 174, 978-992, doi:10.1111/j.1365-246X.2008.03865.x.
Models S362ANI_OLDCRCOR and S2.9EA_OLDCRCOR are discussed and shown in:
Kustowski, B., Dziewonski, A. M., and G. Ekstrom, 2007,
Nonlinear Crustal Corrections for Normal-Mode Seismograms,
Bull. Seismol. Soc. Am., Vol. 97, No. 5, 1756-1762, doi: 10.1785/0120070041
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COMPILATION
Use the Makefile in the 'src' directory. All programs are
written in Fortran 77 and have been tested on Solaris, Mac OS,
and Cygwin (GNU). Note, that, in order to make the compilation
on Mac OS and GNU easy, in the 'Makefile', I used a single
precision version of a subroutine 'splcon' (defined in
'splconsngl.f'). It is sufficiently accurate for most
applications, such as plotting the model etc. However,
the models have been derived using a double precision version
of 'splcon' (defined in 'splcondble.f') on Solaris, which is
compiler dependent. This subroutine is also included in 'src'.
If you have any questions/comments/suggestions regarding
compilation, please let me know.
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PLOTTING VELOCITY and ANISOTROPY USING A REGULAR GRID OF POINTS
The 'velani_global.e' script shows how to evaluate global models
at a given depth and plot them using GMT plotting tools.
The 'velani_eurasia.e' script shows how to evaluate the model
of Eurasia at a given depth and plot it using GMT.
The boundary of the high-resolution part of the model is defined
in 'BEURA.bound', which is embedded on the figure.
Both scripts use the program 'velani',
which evaluates vsh, vsv, Voigt average, and vsh-vsv.
The output is in km/s, if 'absolute' is selected,
or in per cent, if 'relative' is selected.
(The vsh and vsv evaluations are relative to vsh and vsv
in the reference model, respectively.
Both the Voigt-average and vsh-vsv evaluations are relative
to the Voigt average in the reference model.)
'velani' evaluates the velocity and anisotropy only within a selected
rectangular region of interest at points separated by the specified
'pixel size'.
If requested, the average calculated within the entire region of interest
is removed.
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PLOTTING TOPOGRAPHY
The script 'topo.e' shows how to plot the topography of the 410-km and 650-km
discontinuities. The script uses the program 'topo'.
The topography is defined in the model as depressions in km.
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SUBROUTINES EVALUATING ALL PARAMETERS AT A GIVEN POINT
The program 'bin/test_subshsv.exe' demonstrates how to call a subroutine 'subshsv',
which returns perturbations in vsh,vsv,vph,vpv,eta, and density
w.r.t. STW105 at a given colatitude, longitude, and radius;
and a subroutine 'subtopo', which returns depth perturbations of
the transition zone discontinuities.
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CONTACT
If you have any questions, do not hesitate to contact me at
kustowski [at] post (dot) harvard (dot) edu
Bogdan Kustowski