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To: capitan_refugio
capitan_refugio, you may disagree with John Baumgardner, but he is certainly a reputable scientist.

His Terra project is world renowned. Here is one list of his accomplishments:

John R. Baumgardner, Ph.D. Geophysics/Space Physics

Education:

B.S. Electrical Engineering, Texas Tech University - 1968
M.S. Electrical Engineering, Princeton University - 1970
M.S. Geophysics and Space Physics, UCLA - 1981
Ph.D. Geophysics and Space Physics, UCLA - 1983

Organizations:

American Geophysical Union Mineralogical Society of America

Professional Experience:

Technical Staff Member/Scientist - Los Alamos National Laboratory, Theoretical Division, New Mexico (1984 - Present).

Member of Technical Staff and Consultant - Rockwell International, Rocketdyne Division, Laser Department (1978-1979, 1981-1984).

Graduate Research Assistant - University of California, Los Angeles, Dept. of Earth and Space Sciences (1979-1983).

Consultant - R & D Associates (1980-1981).

Project Officer - U. S. Air Force, Air Force Weapons Laboratory, Laser Division, Kirtland AFB, New Mexico (1971-1975).

Current Research Interests:

Three-dimensional numerical simulation of planetary mantle dynamics, global climate change, and nonlinear rheological behavior.

Development of efficient hydrodynamics methods, suitable for 3-D, both explicit and implicit, for massively parallel supercomputers.

Publications:

W.-S. Yang and J. R. Baumgardner, "Matrix-dependent transfer multigrid method for strongly variable viscosity infinite Prandtl number thermal convection," Geophys. and Astrophys. Fluid Dyn., in press, 2000.

H. R. Wenk, J. R. Baumgardner, C. N. Tome, and R. Lebensohn, "A deformation model to explain anisotropy of the inner core," J. Geophys. Res., in press, 2000.

M. A. Richards, H.-P. Bunge, C. Lithgow-Bertelloni, and J. R. Baumgardner, "Mantle convection and plate motion history: Toward general circulation models," History and Dynamics of Global Plate Motions, AGU Monograph Series, 1999.

J. R. Baumgardner and W.-S. Yang, "Earthlike mantle convection from relatively simple rheology," (abstract) Eos, Trans. Am. Geophys. Union, 80, (1999 Fall Meeting Supplement), F26, 1999.

M. A. Richards, W.-S. Yang, and J. R. Baumgardner, "The effectiveness of finite yield stress in obtaining platelike surface velocities," (abstract) Eos, Trans. Am. Geophys. Union, 80, (1999 Fall Meeting Supplement), F962, 1999.

W.-S. Yang and J. R. Baumgardner, "Feasibility of the lava lamp model for the Earth's mantle," (abstract) Eos, Trans. Am. Geophys. Union, 80, (1999 Fall Meeting Supplement), F941, 1999.

D. R. Stegman, M. A. Richards, and J. R. Baumgardner, "A parallel implementation of Lagrangian tracers in TERRA," (abstract) Eos, Trans. Am. Geophys. Union, 80, (1999 Fall Meeting Supplement), F950, 1999.

C. C. Reese, V. S. Solomatov, and J. R. Baumgardner, "Impacts and the thermal evolution of Mars," (abstract) Eos, Trans. Am. Geophys. Union, 80, (1999 Fall Meeting Supplement), F618, 1999.

John R. Baumgardner, Mark A. Richards, Woo-Sun Yang, and Carolina R. Lithgow-Bertelloni, "3-D Spherical Models of Plate Motion With Laterally Varying Rheology," (abstract) Eos, Trans. Am. Geophys. Union, 79, (1998 Fall Meeting Supplement), F911, 1998.

H.-P. Bunge, M. A. Richards, C. Lithgow-Bertelloni, J. R. Baumgardner, S. P. Grand, and B. A. Romanowicz, "Time scales and heterogeneity structure in geodynamic earth models," Science, 280, 91-95, 1998.

Hans-Peter Bunge, Mark A. Richards, and John R. Baumgardner, "A sensitivity study of 3-D spherical mantle convection at 108 Rayleigh number: effects of depth-dependent viscosity, heating mode, and an endothermic phase change," J. Geophys. Res., 102, B6, 11991-12007, 1997.

John R. Baumgardner and Woo-Sun Yang, "A finite element multigrid formulation for variable viscosity in 3-D spherical geometry," (abstract) Eos, Trans. Am. Geophys. Union, 77, (Fall Meeting Supplement), F750, 1996.

Hans-Peter Bunge, Mark A. Richards, and John R. Baumgardner, "The effect of depth-dependent viscosity on the planform of mantle convection," Nature, 379, 436-438, 1996.

Hans-Peter Bunge and John R. Baumgardner, "Mantle convection modeling on parallel virtual machines," Computers in Physics, 9, 207-215, 1995. J. R. Baumgardner, "Thermal runaway in the mantle" (abstract) Eos, Trans. Am. Geophys. Union, 75, 687, 1994.

John R. Baumgardner, "3-D numerical investigation of the mantle dynamics associated with the breakup of Pangea," in Flow and Creep in the Solar System: Observations, Modeling, and Theory, D. B. Stone and S. K. Runcorn, eds., NATO ASI Series C, Vol. 391, 207-224, 1993.

John Baumgardner, "3-D numerical investigation of the mantle dynamics associated with the breakup of Pangea," (abstract) Eos, Trans. Am. Geophys. Union, 73, 1992 Fall Meeting Abstract Volume, 576-577, 1992.

M. A. Moreno, G. Schubert, J. Baumgardner, M. G. Kivelson, and D. A. Paige, "Io's volcanic and sublimation atmospheres," Icarus, 93, 63-81, 1991.

John R. Baumgardner, "Application of supercomputers to 3-D mantle convection," in The Physics of the Planets, S. K. Runcorn, ed., John Wiley and Sons, 199-231, 1988.

J. Baumgardner, M. A. Moreno, G. Schubert, and M. G. Kivelson, "Two classes of volcanic eruptions and their corresponding atmospheres on Io," Bull. Am. Astr. Assoc., 19(3), 856, 1987.

John R. Baumgardner, "Three-dimensional treatment of convective flow in the earth's mantle," J. Stat. Phys., 39, 501-511, 1985.

John R. Baumgardner and Paul O. Frederickson, "Icosahedral discretization of the two-sphere," SIAM J. Numer. Anal., 22, 1107-1115, 1985.

Peter Bird and John Baumgardner, "Fault friction, regional stress, and crust-mantle coupling in southern California from finite element models," J. Geophys. Res., 89, No. B3, 1932-1944, 1984.

John R. Baumgardner and Paul O. Frederickson, "Three-dimensional treatment of mantle convection," (abstract) Eos, Trans. Am. Geophys. Union, 63, 1105, 1982.

149 posted on 01/30/2002 7:16:33 PM PST by adakotab
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To: adakotab
I am aware of his list of publications. It is plain to see that he is a theoretical guy, not a practical applications guy. UCLA was churning out geoscience PhDs in the late 70's and early 80's like crazy - the main problem being that they did not have a firm foundation in geology.

Look at the paper he co-authored with Peter Bird in 1984. A few years before I had collaberated on a similar paper. Finite element models are very tricky to work with. They are reasonable equations to use to describe stress fields, etc., when you are considering a moment in time (like a snapshot). But when you model with them, and attempt reinterative processes, the whole thing breaks down.

Sorry, it's an academic thing. The bottom line is, a computer model must be constrained by real world observations, and then tested for predictability. Baumgardner's concept that crustal recycling can occur over the course of weeks or months has no support in academia. That his computer model can be made to generate these weird and outrageous results doesn't mean there is any validity to it. The entire concept has huge holes. If Baumgardner had a better understanding of rock mechanics and structural geology, he would realize his concept is fatally flawed.

Lest you think I'm just on Baumgardner's case, do a google on John Suppe, Professor of Geology at Princeton. He's a structural geologist and a creationist, and I wonder if he supports Baumgardner's rapid subduction concept.

150 posted on 01/31/2002 12:14:44 AM PST by capitan_refugio
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