Ludek Klimes

Department of Geophysics, Faculty of Mathematics and Physics, Charles University, Prague
Mail address: KG MFF UK, Ke Karlovu 3, 121 16 Praha 2, Czech Republic
Home phone: (+420) 244400054
Office phone: (+420) 22191 1213
FAX: (+420) 22191 1214
E-mail: klimes@seis.karlov.mff.cuni.cz

Born:

February 24, 1958

Degrees:

Graduated from Charles University, Prague, 1982, in Theoretical physics, diploma thesis on Gaussian beams, degree corresponding to MSc.
RNDr degree, Charles University, Prague, 1984, in Geophysics.
PhD degree, Charles University, Prague, 1997, in Geophysics, PhD thesis on seismic waves in complex 3-D structures.
DrSc degree, Charles University, Prague, 1998, in Geophysics.

Employment:

1982-1985: Postgraduate stay at the Institute of Geophysics, Charles University, Prague. Research in the field of theoretical seismology.
1985-1993: Research worker at the Institute of Geology and Geotechnics, Czechoslovak Academy of Sciences, Prague.
since 1993: Research geophysicist at the Department of Geophysics, Charles University, Prague.

Long-term visits:

1989-1990 (1 year): Visiting fellowship in Canadian Government Laboratories, with Department of Energy, Mines and Resources, at the Geological Survey of Canada in Ottawa, Ontario.
1992-1993 (3 months): Visiting professor at the Fredericiana University, Karlsruhe.
1995 (2 months): Visiting researcher at the Institute Francais du Petrole, Pau.
2005-2007 (10 months): Visiting researcher at the Schlumberger Cambridge Research, Cambridge, United Kingdom.

Areas of research interests:

Seismic wave propagation, computational seismology and theoretical geophysics, in particular theoretical development and accuracy estimation of computational methods. The main attention is devoted to the properties of wave fields in 3-D models at high-frequencies and to asymptotic methods, especially to the computation of travel times, paraxial ray approximations, summation of Gaussian beams and packets, and to their applications in refraction and reflection seismics.

Work experience:

Summation of Gaussian beams and packets, generalization of the Maslov asymptotic method using the linear canonical transform, coupling ray theory, ray tracing and dynamic ray tracing in 3-D heterogeneous anisotropic structures, paraxial ray methods, higher-order derivatives and perturbations of travel time, chaotic behaviour of rays, velocity models, sensitivity of seismic waves to the structure, stochastic inversion of travel times and of wave fields, accuracy estimation of various approximate methods.

Memberships in scientific and professional societies:

AMS (American Mathematical Society)
OSA (Optical Society of America)
SEG (Society of Exploration Geophysicists)
SIAM (Society for Industrial and Applied Mathematics)
Member of the Subcommission on Heterogeneity of IASPEI Commission on Wave Propagation

Memberships in Editorial Boards:

Journal of Seismic Exploration

Lectures at the Department of Geophysics:

Modelling seismic waves in 3-D (GEO052)
Inversion of seismic wavefields and travel times (GEO051)

Topics for bachelor, master or PhD theses

Publications:

1 chapter in a book
38 papers in reviewed journals
35 reviewed expanded abstracts
No submitted paper
73 contributions to SW3D consortium reports
1 open file report
13 internal research reports
3 theses
27 articles in lecture notes, papers in proceedings, reviewed abstracts

Selected papers:

Klimes, L. (1984): Expansion of a high-frequency time-harmonic wavefield given on an initial surface into Gaussian beams. Geophys. J. R. astr. Soc., 79, 105-118.
Klimes, L. (1984): The relation between Gaussian beams and Maslov asymptotic theory. Stud. geophys. geod., 28, 237-247.
Klimes, L. (1986): Discretization error for the superposition of Gaussian beams. Geophys. J. R. astr. Soc., 86, 531-551.
Cerveny, V., Klimes, L. & Psencik, I. (1988): Complete seismic-ray tracing in three-dimensional structures. In: Doornbos, D.J. (ed.), Seismological Algorithms, pp. 89-168, Academic Press, New York.
Klimes, L. (1989): Optimization of the shape of Gaussian beams of a fixed length. Stud. geophys. geod., 33, 146-163.
Klimes, L. (1989): Gaussian packets in the computation of seismic wavefields. Geophys. J. int., 99, 421-433.
Klimes, L. (1994): Transformations for dynamic ray tracing in anisotropic media. Wave Motion, 20, 261-272.
Klimes, L. (1996): Accuracy of finite differences in smooth media. Pure and appl. Geophys., 148, 39-76.
Klimes, L. (1996): Grid travel-time tracing: second-order method for the first arrivals in smooth media. Pure and appl. Geophys., 148, 539-563.
Bulant, P. & Klimes, L. (2002): Numerical algorithm of the coupling ray theory in weakly anisotropic media. Pure and appl. Geophys., 159, 1419-1435.
Klimes, L. (2002): Lyapunov exponents for 2-D ray tracing without interfaces. Pure and appl. Geophys., 159, 1465-1485.
Klimes, L. (2002): Application of the medium covariance functions to travel-time tomography. Pure and appl. Geophys., 159, 1791-1810.
Klimes, L. (2002): Second-order and higher-order perturbations of travel time in isotropic and anisotropic media. Studia geophys. et geodaet., 46, 213-248.
Klimes, L. (2003): Weak-contrast reflection-transmission coefficients in a generally anisotropic background. Geophysics, 68, 2063-2072.
Klimes, L. & Bulant, P. (2004): Errors due to the common ray approximations of the coupling ray theory. Stud. geophys. geod., 48, 117-142.
Klimes, L. (2006): Spatial derivatives and perturbation derivatives of amplitude in isotropic and anisotropic media. Stud. geophys. geod., 50, 417-430.
Klimes, L. (2006): Ray-centred coordinate systems in anisotropic media. Stud. geophys. geod., 50, 431-447.
Klimes, L. (2006): Common-ray tracing and dynamic ray tracing for S waves in a smooth elastic anisotropic medium. Stud. geophys. geod., 50, 449-461.
Klimes, L. & Bulant, P. (2006): Errors due to the anisotropic-common-ray approximation of the coupling ray theory. Stud. geophys. geod., 50, 463-477.
Cerveny, V., Klimes, L. & Psencik, I. (2007): Seismic ray method: Recent developments. Advances in Geophysics, 48, 1-126.

Minor biographical details

SW3D - main page of consortium Seismic Waves in Complex 3-D Structures .

Last update: 16.12.2009