T. Guy Masters 1. General Information Thomas Guy Masters Professor IGPP-0225 Scripps Institution of Oceanography, Univ. Cal. San Diego La Jolla, CA 92093-0225 (858) 534 4122; gmasters@ucsd.edu Personal Birth: 5 October 1954 York, England Citizenship: UK, Resident Alien in USA Married: Virginia F. Masters Home: 3849 Arroyo Sorrento Rd, San Diego, CA 92130 Education B.Sc. 1975 University of Manchester, England (Geology and Physics -- Class 1) Ph.D. l979 University of Cambridge, England Positions Held 7/1999--6/2002: Director for the USCD Earth Sciences Program. 7/1999--6/2002: Vice Chair, SIO Graduate Department. 7/1990--present Professor, Institute of Geophysics and Planetary Physics, SIO, University of California, San Diego. 7/1985--6/1990 Associate Professor, Institute of Geophysics and Planetary Physics, SIO, University of California, San Diego. 7/1981--6/1985 Assistant Research Geophysicist, Institute of Geophysics and Planetary Physics, SIO, University of California, San Diego. 1/1980--6/1981 Postgraduate Researcher, Institute of Geophysics and Planetary Physics, SIO, University of California, San Diego. 1979--1980 Cecil and Ida Green Scholar, Institute of Geophysics and Planetary Physics, SIO, University of California, San Diego. 10/1978--12/1978 Research Assistant, Department of Geodesy and Geophysics, University of Cambridge, England. Professional Memberships Royal Astronomical Society; American Geophysical Union; Seismological Society of America AAAS Awards Cecil and Ida Green Scholarship (1979--80) Fellow AGU, 1995 Graduate students supervision Dr J.S. Gomberg (1986) Dr. J. Scott(1992) Dr M. Ritzwoller (1987) Dr. J. Bhattacharyya (1995) Dr M.F. Smith (1989) Dr. H. Bolton (1996) Dr R.L. Woodward (1989) Dr. S. Johnson (1997) Dr R. Widmer (1991) Dr. J. Hanson (1998) Dr V. Schulte-Pelkum (2001) Post Doctoral supervision Dr I.H. Henson (1987-1988) Dr J. Um (1994--1997) Dr G. Laske (1994--1996) Dr. G. Pari (1997--1999) Dr T. Becker(2002--2004) Dr. M. Ishii (2003--2005) Invited Lectures (1992--2001) (excluding invited AGU presentations) IRIS meeting, Santa Fe, April 1992; UC Berkeley, Oct. 1992 U. Leeds, Oct. 1992; Geoscope Symposium, Paris, Sep. 1992; U. Toronto, Jan. 1993; Princeton, Feb. 1993, Los Alamos Convection Workshop Jul. 1993 Shelter Island CSEDI/Mineral Physics meeting, Sep. 1993; Santa Fe CSEDI meeting, Oct. 1993; Harvard U., Feb. 1994; Colorado School Mines (Svenfest), Mar 1994; Cal Tech (Seismo Lab seminar) May 1994; Workshop on standard Earth models, Maryland, May 1994. SEDI meeting, Whistler, Aug., 1994; Royal Society meeting on High P and T research, London, Jan. 1995; CalTech division seminar, Feb. 1995; IDA meeting, Cabo San Lucas, Mar. 1995. Plume Conference, July 1995, Germany Chicago University, May 1996 Edinburgh University (in honor of Jack Jacobs), June 1996 Gordon Conference, July 1996 UC Berkeley, May 1997 Harvard, Nov 1997 Geosciences 98, Keele, England, April 1998 CHiPR workshop, Watertown, June 1998 U. Michigan, Sept. 1998 Yale, Oct. 1998 UCLA, April 1999 IRIS Workshop, Yosemite, June 1999 Erice, Sicily, July 1999 IUGG, Birmingham, July 1999 SEDI meeting, Exeter, UK, August 2000 Goldschmidt Conference, Oxford, UK, September 2000 GERM workshop, La Jolla, March 2001 Service to the community (excluding university service) Executive committee of IRIS (Incorporated Research Institutions in Seismology) 1991-1993 Executive committee of SEDI (Studies of the Earth's Deep Interior, IUGG committee) 1991-present Executive committee of CHiPR (Center for High Pressure Research) 1997-2001 Advisory committee of COMPRES (2003-present) Hess medal committee (AGU), AGU 1995-1996 NRC/NAS Committee on Seismology 1996-2000 NSF Geophysics Panel 1995-1997 NSF CSEDI Panel 1996 DMSSC, IRIS, 1999-2002 Recent workshops/meetings: Organizer of Reference Earth Model workshop Harvard, 2000 Organizer of COMPRES meeting, La Jolla, 2001 Session chair, Gordon Conference, Mass, USA, 2001 Co-organizer of the Gilbertfest, La Jolla, April, 2002 Co-organizer of SEDI meeting, Lake Tahoe, 2002 Co-organizer of CSEDI workshop, La Jolla, 2004 RESEARCH INTERESTS: 1) Analysis of earth structure using the splitting and coupling of free oscillations; 2) 3D structure and anisotropy of the upper mantle using the phase and polarization of surface waves; 3) Global mantle tomography using long-period absolute and differential travel times; 4) Attenuation in the earth from mode, surface wave, and body-wave data; 5) Global crust and lithosphere models. 6) Inclusion of mineral physics data into seismological modelling Bibliography for Guy Masters (excluding abstracts and unpublished reports) Jacobs, J.A., and G. Masters, 1976, The stability of the earth's core and the geodynamo, Nature, 261, 483--484 Masters, G., J. Berger, and F. Gilbert, 1978, Observations from the IDA network of the moment tensor of the Oaxaca earthquake, November 29, 1978, Geofisica Internacional, 17, 281--286 Gubbins, D., and T.G. Masters, 1979, Driving mechanisms for the Earth's dynamo, Advances in Geophysics, Academic Press, 1--50 Gubbins, D., T.G. Masters, and J.A. Jacobs, 1979, Thermal evolution of the Earth's core, Geophys. J. R. Astron. Soc., 59, 57--99 Masters, G., 1979, Observational constraints on the chemical and thermal structure of the earth's deep interior, Geophys. J. R. Astron. Soc., 57, 507--534 Masters, G., and F. Gilbert, 1981, Structure of the inner core inferred from observations of its spheroidal shear modes, Geophys. Res. Lett., 8, 569--571 Masters, G., T.H. Jordan, P.G. Silver, and F. Gilbert, 1982, Aspherical earth structure from fundamental spheroidal-mode data, Nature, 298, 609--613 Masters, G., and F. Gilbert, 1983, Attenuation in the earth at low frequencies, Phil. Trans. R. Soc. London, A308, 479--522 Masters, G., J. Park, and F. Gilbert, 1983, Observations of coupled spheroidal and toroidal modes, J. Geophys. Res., 88, 10,285--10,298 Priestley, K.F., and T.G. Masters, 1986, Source Mechanism of the September 19, 1985 Michoacan earthquake and its implications, Geophys. Res. Lett., 13, 601--604 Agnew, D.C., J. Berger, W.E. Farrell, J.F. Gilbert, G. Masters, and D. Miller, 1986, Project IDA: A decade in review, EOS Trans. AGU, 67, 203--212 Ritzwoller, M., G. Masters, and F. Gilbert, 1986, Observations of anomalous splitting and their interpretation in terms of aspherical structure, J. Geophys. Res., 91, 10,203--10,228 Stark, P.B., R.L. Parker, G. Masters, and J.A. Orcutt, 1986, Strict bounds on seismic velocity in the spherical earth, J. Geophys. Res., 91, 13,892--13,902 Masters, G., 1989, The structure of the Earth's core, Encyclopedia of Geophysics, ed D. James, 318--322 Masters, G., and M. Ritzwoller, 1988, Low frequency seismology and three-dimensional structure -- observational aspects, Mathematical Geophysics, eds. N.J. Vlaar, G. Nolet, M.J.R. Wortel, and S.A.P.L. Cloetingh, D. Reidel Publ. Co., Dordrecht, The Netherlands, 1--30 Ritzwoller, M., G. Masters, and F. Gilbert, 1988, Constraining aspherical structure with low frequency interaction coefficients: Application to uncoupled multiplets, J. Geophys. Res., 93, 6369--6396 Gomberg, J.S., K.F. Priestley, T.G. Masters, and J.N. Brune , 1988, The structure of the crust and upper mantle of northern Mexico, Geophys. J., 94, 1--20 Gomberg, J.S., and T.G. Masters, 1988, Waveform modeling using locked-mode synthetic and differential seismograms: application to the determination of the structure of Mexico, Geophys. J., 94, 193--218 Smith, M.F., and G. Masters, 1989, Aspherical structure constraints from free oscillation frequency and attenuation measurements, J. Geophys. Res., 94, 1953--1976 Woodward, R.L., and G. Masters, 1989, Calibration and data quality of the long period SRO/ASRO networks, 1977 -- 1980, Bull. Seismol. Soc. Am., 79, 1972--1983 Masters, G., 1989, Low frequency seismology and the three-dimensional structure of the Earth, Phil. Trans. R. Soc. London, A328, 329--349 Smith, M.F., and G. Masters, 1989, The effect of Coriolis coupling of free oscillation multiplets on the determination of aspherical earth structure, Geophys. Res. Lett., 16, 263--266 Shearer, P.M., and G. Masters,1990, The density and shear velocity contrast at the inner core boundary, Geophys. J. Int., 102, 491--498 Masters, T.G., and P.M. Shearer, 1990, Summary of seismological constraints on the structure of the Earth's core, J. Geophys. Res., 95, 21,691--21,695 Widmer, R., G. Masters, and F. Gilbert, 1991, Spherically symmetric attenuation within the Earth from normal mode data, Geophys. J. Int., 104, 541--553 Masters, G., 1991, Structure of the Earth: mantle and core, Rev. Geophys. (U.S. National Report to IUGG), 671--679 Woodward, R.L., and G. Masters, 1991, Global upper mantle structure from long-period differential travel-times, J. Geophys. Res., 96, 6351--6377 Woodward, R.L., and G. Masters, 1991, Lower mantle structure from $ScS-S$ differential travel times, Nature, 352, 231--233 Shearer, P.M., and G. Masters, 1992, Global mapping of topography on the 660 km discontinuity, Nature, 355, 791--796 Woodward, R.L., and G. Masters, 1992, Upper mantle structure from long-period differential travel times and free-oscillation data, Geophys. J. Int., 109, 275--293 King, S., and G. Masters, 1992, An inversion for radial viscosity structure using seismic tomography, Geophys. Res. Lett., 19, 1551--1554 Widmer, R. G. Masters, and F. Gilbert, 1992, Observably split multiplets -- data analysis and interpretation in terms of large-scale aspherical structure, Geophys. J. Int., 111, 559--576 Widmer, R. W. Zurn, and G. Masters, 1992, Observations of low order toroidal modes from the 1989 Macquarie Rise event, Geophys. J. Int., 111, 226 Masters, G., 1993, Core models ring true, Nature, 366, 629--630 Bhattacharyya, J., P. Shearer, and G. Masters, 1993, Inner core attenuation from PKP(BC) versus PKP(DF) waveforms, Geophys. J. Int., 114, 1--11 Sutton, P.J., P.F. Worcester, G. Masters, B.D. Cornuelle, and J.F. Lynch, 1993, Ocean mixed layers and acoustic pulse propagation in the Greenland Sea, J. Acoust. Soc. Am., 94, 1517--1526 Sutton, P.J., W.M.L. Morawitz, B.D. Cornuelle, G. Masters, and P.F. Worcester, 1994, Incorporation of acoustic normal mode data into tomographic inversions in the Greenland Sea, J. Geophys. Res., 99, 12,487--12,502 Scott, J.S., G. Masters, and F. Vernon, 1994, Three-dimensional velocity structure of the San Jacinto fault zone near Anza, California. Part I: P-waves, Geophys. J. Int., 119, 611--626 Laske, G., G. Masters, and W. Zurn, 1994, Frequency dependent polarization measurements of long period surface waves and their implications for global phase velocity maps, Phys. Earth Planet. Int., 84, 111--137 Masters, G., and R. Widmer, 1995, Free Oscillations: Frequencies and attenuations, in: Global Earth Physics, A Handbook of Physical Constants, Ed T.J. Ahrens, AGU, Washington, DC, 104--125 Masters, G., and P.M. Shearer, 1995, Seismic Models of the Earth: Elastic and anelastic, in: Global Earth Physics, A Handbook of Physical Constants, Ed T.J. Ahrens, AGU, Washington, DC, 88--103 Minster, J-B., N. Williams, T.G. Masters, J.F. Gilbert, and J.S. Haase, 1995, Application of evolutionary programming to earthquake hypocenter determination, in: Evolutionary programming; Proceedings of the fourth annual cconference on EP, Eds J. McDonnell, R. Reynolds, and D.B. Fogel, MIT Press, Cambridge Mass, 3--17 Masters, G., and A.M. Dziewonski, 1996, Mantle and core studies, Geotimes, 41, 46--47 Masters, G., S. Johnson, G. Laske, and H. Bolton, 1996, A shear-velocity model of the mantle, Phil. Trans. R. Soc. Lond. A, 354, 1385--1411 Laske, G., and G. Masters, 1996, Constraints on global phase velocity maps from long-period polarization data, J. Geophys. Res., 101, 16,059--16,075 Bhattacharyya, J., G. Masters, and P.M. Shearer, 1996, Global lateral variations of shear wave attenuation in the upper mantle, J. Geophys. Res., 101, 22,273--22,289 Masters, G., and A.M. Dziewonski, 1997, Mantle and core studies, Geotimes, 42, 59--60 Masters, G., 1997, Tracking slabs in the lower mantle, Nature, 386, 558 Masters, G., 1997, Hess medal citation for Tom Ahrens, EOS Trans. AGU, 78, 319 Laske, G., and G. Masters, 1997 (electronic) A global digital map of sediment thickness, http://mahi.ucsd.edu/Gabi/sediment.html Mooney, W.D., G. Laske, and G. Masters, 1998, CRUST 5.1: A global crustal model at 5 X 5 degrees, J. Geophys. Res., 103, 727--747 Laske, G., and G. Masters, 1998, Surface-wave polarization data and global anisotopic structure, Geophys. J. Int., 132, 508--520 Masters, G., and K. Richards-Dinger, 1998, On the efficient calculation of ordinary and generalized spherical harmonics, Geophys. J. Int., 135, 307--309 Laske, G., and G. Masters, 1999, Limits on differential rotation of the inner core from an analysis of the Earth's free oscillations, Nature, 402, 66--69 Masters, G., G. Laske, and F. Gilbert, 2000, Autoregressive estimation of the splitting matrix of free oscillation multiplets, Geophys. J. Int., 141,25--42 Masters, G., G. Laske, H. Bolton, and A. Dziewonski, 2000, The relative behavior of shear velocity, bulk sound speed, and compressional velocity in the mantle: implications for chemical and thermal structure, in: Earth's deep interior, AGU Monograph 117, Ed S. Karato, 63--87 Masters, G., G. Laske, and F. Gilbert, 2000, Matrix autoregressive analysis of free oscillation splitting and coupling, Geophys. J. Int., 143, 478--489 Masters, G. G. Laske, and F. Gilbert, 2000, Large-scale Earth Structure from Analysis of Free Oscillaion Splitting and Coupling. In: Problems in geophysics in the new milleniuem, eds E. Boschi, G. Ekstrom, A. Morelli, Edirice Compositori, pp63--87 Masters, G., 2000 SSA medal citation for Adam Dziewonski, Seis. Res. Lett, 71, 457--458 Bolton, H., and G. Masters, 2001, Travel times of P and S from the global digital networks: implications for the relative variation of P and S in the mantle. J. Geophys. Res., 106, 13,527--13,540. Schulte-Pelkum, V., G. Masters, and P. Shearer, 2001, Upper mantle anisotropy from long-period P polarization, J. Geophys. Res., 106, 21,917--21,934 Laske, G., and G. Masters, 2003 The Earth's free oscillations and the differential rotation of the inner core, In: Earth's Core,: Dynamics, Structure, Rotation; eds Dehant et al., Geodynamics series 31, AGU Masters, G., and D. Gubbins, 2003 On the resolution of density within the Earth Phys. Earth Planet. Int., 140, 159--167 Gubbins, D., D.Alfe, G. Masters, D,G, Price, and M.J. Gillan, 2003 Can the Earth's dynamo run on heat alone? Geophys. J. Int., 155, 609--622. Gubbins, D., D.Alfe, G. Masters, D,G, Price, and M.J. Gillan, 2004 Gross thermodynamics of two-component core convection Geophys. J. Int., 157, 1407--1414. Montelli, R, G. Nolet, G. Masters, F.A. Daheln, and S-H Hung, 2004 Global P and PP traveltime tomography: rays versus waves Geophys. J. Int., 158, 637--654. Montelli, R, G. Nolet, F.A. Daheln, G. Masters, E.E. Engdahl, and S-H Hung, 2004 Finite-frequency tomography reveals a variety of plumes in the mantle Science, 303, 338--343 Schubert, G., G. Masters, P.Olson, and P. Tackley, 2004 Superplumes or plume clusters? Phys. Earth Planet. Int., 146, 147--162