Bulgarian Institute of Solid State Physics
Bulgarian Academy of Sciences














Created: 9.9.2014
Updated: 3.1.2024
Member of BAS
(06.03.1933 – 31.08.2014)


Professor Stoycho Panchev was born in Lisec the vilage in Lovech district.


He studied physics and meteorology in the Sofia University. After that, he was Ph.D. student at the Bulgarian Academy of Sciences

S. Panchev specialised meteorology in Russia, USA and Japan


He investigated theory of chaos and turbulent dynamics

Professional Experience

He was assistant, associate professor and full professor of the Sofia University (1970-1994)

Teaching activities

S. Panchev was invited professor in the universities in Russia, USA, Japan and Serbia


  1. S. Evtimov, S. Panchev, T. Spassova, On the Lorenz System with Strengthened Nonlinearity, Comptes rendus de l’Academie bulgare des Sciences, 53 (3) 33-36 (2000)

  2. S. Panchev, Random Functions and Turbulence, Oxford, Pergamon Press (1971)

  3. S. Panchev, Dynamic Meteorology, Hague: D Reidel (1985)

  4. S. Panchev, On the theory of geostrophic adjustment in nonadvective approximation, Bulgarian Geophysical Journal, vol. 11 (No 4) 17-25 (1985)

  5. S. Panchev, T. Spassova, A barotropic model of the Ekman planetary boundary layer based on the geostrophic momentum approximation, Boundary-Layer Meteorology, 40 (4) 339-347 (1987)

  6. S. Panchev, T. Spassova, Stability of Gradient Flows with Constant Horizontal Shear in the Atmosphere, Bulgarian Geophysical Journal, 14 (4) 22-28 (1988)

  7. S. Panchev, T. Spassova, An Exact Solution for Two-Dimensional Frictionless Motion in the Atmosphere, Advances in Atmospheric Sciences, 7 (2) 137-141 (1990)

  8. S. Panchev, T. Spassova, A Theoretical Approach to the Problem of Blocking Due to Synoptic Scale Topography, (1991)

  9. S. Panchev, Comptes rendus de l’Academie bulgare des Sciences, 50 (6) 55-58 (1997)

  10. S. Panchev, T. Spassova, The Lorenz chaotic system with modified X-, Y-equations, Bulletin Of The Calcutta Mathematical Society (91) 17-28 (1999)

  11. S. Panchev, T. Spassova, Reaction of two simple nonlinear dynamical systems to constant forcing, Atmosfera, 12 (3) 161-171 (1999)

  12. S. Panchev, T. Spassova, P. Stamenov, A Nonlinear Oscillator Derived from the Lorenz Chaotic System, Comptes rendus de l’Academie bulgare des Sciences, 54 (11) 27-32 (2001)

  13. S. Panchev, Analytical properties of the Sprott’s chaotic flows, Chaos Solitons and Fractals, 21 (3) 721-728 (2004)

  14. S. Panchev, T. Spassova, The Lorenz chaotic systems as nonlinear oscillators with memory, Atmosfera, 17 (3) 171-181 (2004)

  15. S. Panchev, N. K. Vitanov, On asymptotic properties of some complex Lorenz-like systems (2005)

  16. S. Panchev, T. Spassova, Simple general atmospheric circulation and climate models with memory, Advances in Atmospheric Sciences, 22 (5) 765-769 (2005)

  17. S. Panchev, M. Tsekov, Empirical evidences for chaos and persistencein solar-terrestrial phenomenon, Journal of Atmospheric and Solar-Terrestrial Physics (69) 2391-2404 (2007)

  18. S. Panchev, T. Spassova, N. K. Vitanov, Analytical and numerical investigation of two families of Lorenz-like dynamical systems, Chaos Solitons and Fractals, 33 (5) 1658-1671 (2007)

  19. T. Spassova, S. Panchev, On a Non-Linear Dynamical System Defuved from the Shallow Water Equations, (1996)

  20. T. Spassova, S. Panchev, Structural Sensitivity of the Lorenz Low Order System, Bulgarian Journal of Meteorology and Hydrology, v. 8 (3-4) 121-130 (1997)

  21. T. Spassova, S. Panchev, A nonstandard statistics and its applications in meteorology and hydrology, Bulgarian Journal of Meteorology and Hydrology, v. 15 (2) 81-93 (2010)

  22. T. Spassova, S. Panchev, A shallow water type model of large scale atmospheric dynamics, BJMH, vol. 16 (No 2) 2-11 (2011)

  23. T. Spassova, S. Panchev, Mean levels in polytropic model of the atmosphere, BJMH, vol. 16 (No 2) 12-17 (2011)

  24. T. Spassova, S. Panchev, Dynamical models of verticaly integrated atmosphere, Bulgarian Journal of Meteorology and Hydrology, v. 19 (1-2) 33-42 (2014)

  25. M. Tsekov, S. Panchev, Decadal variability in the diurnal temperature range and daily sunshine duration in Sandanski region, southwest Bulgaria, Comptes rendus de l’Academie bulgare des Sciences, 60 (5) 487-492 (2007)

  26. M. Tsekov, S. Panchev, Usage of annual versus daily and monthly data in the scaling analysis of meteorological time series, Comptes rendus de l’Academie bulgare des Sciences, 60 (1) 31-36 (2007)

  27. M. Tsekov, S. Panchev, Magnitude and sign correlations in sunshine duration and diurnal temperature range records from the Sandanski weather station, Comptes rendus de l’Academie bulgare des Sciences, 60 (12) 1283-1288 (2007)

  1. Stoycho Panchev