Alexander Gluhovsky

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Alexander B. Gluhovsky
Alma mater Moscow State University (M.S.)
USSR Academy of Sciences (Ph.D.)
Known forLow-order models (LOMs) of atmospheric and climate dynamics
Subsampling methodology for time series analysis
Scientific career
Fields Geophysical fluid dynamics
Computational statistics
Institutions Purdue University
Doctoral advisor Alexander Obukhov

Alexander B. Gluhovsky is an American physicist and statistician known for his contributions to geophysical fluid dynamics, particularly in the development of low-order models for atmospheric and climate phenomena, and for his work in computational statistics applied to time series analysis in the geosciences. He is a professor emeritus at Purdue University (in West Lafayette, Indiana) in the Department of Earth, Amospheric, and Planetary Sciences, and has a joint appointment in the Department of Statistics as well. [1] [2]

Contents

Education and career

Gluhovksy earned his Master of Science (M.S.) in mathematics and statistics from Moscow State University and received his Ph.D. in applied mathematics from the USSR Academy of Sciences in 1973. [1] [2] His doctoral advisor was the prominent Soviet physicist and applied mathematician Alexander Obukhov. [3]

Gluhovsky's association with Purdue University began in 1992 when he joined the Department of Earth and Atmospheric Sciences. In 1996 he joined the Department of Statistics as a visiting professor. [4] In 2007, his position was formalized with joint appointments as an associate professor in both departments. [4] He subsequently achieved the rank of professor and is currently a professor emeritus at the university. [1]

Research contributions

Gluhovsky's research is interdisciplinary, lying at the intersection of nonlinear dynamics, atmospheric science, and statistical inference.

Low-order models (LOMs)

A major theme of his work is the formulation and analysis of low-order models (LOMs) for complex geophysical flows, such as those related to the atmosphere and climate. [5]

He proposed and analyzed LOMs, often in the form of coupled 3-mode nonlinear systems known in mechanics as Volterra gyrostats (extensions of the Lorenz system). The equations of the gyrostat, which describe the motion of a rigid body containing a spinning rotor, are adapted by Gluhovsky as a basis to construct geophysical fluid dynamics models while ensuring the conservation of energy and other physical properties. [5] This approach has been applied to model phenomena such as Rayleigh-Bénard convection (which is related to mesoscale atomospheric dynamics) and the El Niño-Southern Oscillation (ENSO). [6]

His work connects the dynamic properties of LOMs, such as the existence of coherent structures, to observable features in turbulent flows and atmospheric datasets. [7]

Subsampling methodology

Gluhovsky is a notable contributor to the field of computational statistics for time series, particularly through the use of resampling methods in weather and climate analysis.

He has championed the use of subsampling (a non-parametric resampling technique) to derive reliable confidence intervals and estimates for statistical parameters of highly complex and non-linear atmospheric and climate time series, where traditional parametric methods often fail due to unmet assumptions. [8] [9]

His work has extended these statistical techniques to estimate higher-order moments (such as skewness and kurtosis) for nonlinear time series, which are essential for characterizing extreme weather events. [10]

Gluhovsky has also published research on the effects of land-use/land-cover change on surface temperature trends, employing statistical methods to separate anthropogenic local effects from larger-scale climate forcing.

References

  1. 1 2 3 "Alexander Gluhovsky - Department of Earth, Atmospheric, and Planetary Sciences - Purdue University". Purdue University. Retrieved 2025-12-06.
  2. 1 2 "Alexander Gluhovsky - Purdue Department of Statistics". Purdue University. Retrieved 2025-12-06.
  3. ↑ "Alexander B. Gluhovsky". Mathematics Genealogy Project. North Dakota State University. Retrieved 2025-12-06.
  4. 1 2 "Alexander Gluhovsky Associate Professor Appointment". Purdue Department of Statistics. Purdue University. February 1, 2007. Retrieved 2025-12-06.
  5. 1 2 Gluhovsky, A. (2006). "Energy-conserving and Hamiltonian low-order models in geophysical fluid dynamics" (PDF). Nonlinear Processes in Geophysics . 13 (2): 125–134. Bibcode:2006NPGeo..13..125G. doi: 10.5194/npg-13-125-2006 .
  6. ↑ Gluhovsky, A. (2017). "A gyrostatic low-order model for the El Ñino–Southern Oscillation". Complexity . 2017 6176045. doi: 10.1155/2017/6176045 .
  7. ↑ Gluhovsky, A.; Tong, C.; Agee, E. (2002). "Selection of modes in convective low-order models". Journal of the Atmospheric Sciences . 59 (7): 1383–1393. Bibcode:2002JAtS...59.1383G. doi:10.1175/1520-0469(2002)059<1383:SOMICL>2.0.CO;2.
  8. ↑ Gluhovsky, Alexander (2008). "Subsampling Methodology for the Analysis of Nonlinear Atmospheric Time Series". In Donner, R. V.; Barbosa, S. M. (eds.). Nonlinear Time Series Analysis in the Geosciences. Vol. 112. Springer. pp. 3–16. doi:10.1007/978-3-540-78938-3_1.
  9. ↑ Gluhovsky, A. (2011). "Statistical inference from atmospheric time series: detecting trends and coherent structures". Nonlinear Processes in Geophysics . 18 (4): 537–544. Bibcode:2011NPGeo..18..537G. doi: 10.5194/npg-18-537-2011 .
  10. ↑ Gluhovsky, Alexander; Agee, Ernest (September 2009). "Estimating Higher-Order Moments of Nonlinear Time Series". Journal of Applied Meteorology and Climatology . 48 (9): 1948–1954. Bibcode:2009JApMC..48.1948G. doi:10.1175/2009JAMC2124.1 . Retrieved 2025-12-06.
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