Publications

Papers in Refereed Journals

A coupled vegetation-crust model for patchy landscapes
S. Kinast, Y. Ashkenazy, and E. Meron, accepted to Pure and Applied Geophysics.

The effects of psammophilous plants on sand dune dynamics
G. Bel, Y. Ashkenazy, Journal of Geophysical Research 119, 1636-1650 (2014); doi:10.1002/2014JF003170.

Inferring the impact of rainfall gradient on biological soil crusts developmental stage and thus on soil physical structures in sand dunes
E. Zaady, I. Katra, H. Yizhaq, S. Kinast, Y. Ashkenazy, Aeolian Research 13, 81-89 (2014).

Physical forcing and physical/biochemical variability of the Mediterranean Sea: a review of unresolved issues and directions for future research
P. Malanotte-Rizzoli et al., Ocean Sci. 10, 281-322 (2014); doi:10.5194/os-10-281-2014.

The effect of wind and precipitation on vegetation and biogenic crust dynamics in the Sde-Hallamish sand dunes
R. Amir, S. Kinast, H. Tsoar, H. Yizhaq, E. Zaady, and Y. Ashkenazy, Journal of Geophysical Research 119, 437-450 (2014); doi: 10.1002/2013JF002944.

The role of sea ice in the temperature-precipitation feedback
Hezi Gildor, Yosef Ashkenazy, Eli Tziperman, and Ilit Lev, Climate Dynamics 43 (3-4), 1001-1010 (2014); doi: 10.1007/s00382-013-1990-7.

Ocean circulation under globally glaciated Snowball Earth conditions: steady state solutions
Y. Ashkenazy, H. Gildor, M. Losch, E. Tziperman, Journal of Physical Oceanography 44, 24-43 (2014).

Dominant imprint of Rossby waves in the climate network
Y. Wang, A. Gozolchiani, Y. Ashkenazy, Y. Berezin, O. Guez, and S. Havlin, Physical Review Letters 111, 138501 (2013). See also PRL synopsis

Spatiotemporal model for the progression of sand blowouts
H. Yizhaq, Y. Ashkenazy, N. Levin, and H. Tsoar, Physica A 392, 4502-4515 (2013).

The relation between the statistics of open ocean currents and the temporal correlations of the wind
G. Bel and Y. Ashkenazy, New Journal of Physics 15, 053024 (2013).

Biogenic crust dynamics on sand dunes
S. Kinast, E. Meron, H. Yizhaq and Y. Ashkenazy, Physical Review E 87, 020701(R) (2013).

Dynamics of a snowball ocean
Y. Ashkenazy, H. Gildor, M. Losch, F. A. Macdonald, D. P. Schrag, E. Tziperman, Nature 495, 90-93 (2013). See also the journal page.

Multiple sea-ice states and abrupt MOC transitions in a general circulation ocean model
Y. Ashkenazy, M. Losch, H. Gildor, D. Mirzayof, and E. Tziperman, Climate Dynamics 40, 1803-1817 (2013). DOI 10.1007/s00382-012-1546-2.

Continental constriction and sea ice thickness in a Snowball-Earth scenario
E. Tziperman, D. S. Abbot, Y. Ashkenazy, H. Gildor, D. Pollard, C. G. Schoof, and D. P. Schrag Journal of Geophysical Research 117, C05016 (2012). doi:10.1029/2011JC007730

A new approximation for the dynamics of topographic Rossby waves over an arbitrary bottom profile
Y. Ashkenazy, N. Paldor, and Y. Zarmi, Tellus A 64, 18160 (2012). doi:10.3402/tellusa.v64i0.18160.

Sand dune mobility under climate change in the Kalahari and Australian Deserts
Y. Ashkenazy, H. Yizhaq, and H. Tsoar, Climatic Change 112, 901-923 (2012). doi:10.1007/s10584-011-0264-9.

Box Modeling of the Eastern Mediterranean Sea
Y. Ashkenazy, P. Stone and P. Malanotte-Rizzoli, Physica A 391, 1519-1531 (2012), doi:10.1016/j.physa.2011.08.026.

On the probability and spatial distribution of ocean surface currents
Y. Ashkenazy and H. Gildor, Journal of Physical Oceanography 41, 2295-2306 (2011) doi: 10.1175/JPO-D-11-04.1.

On the meridional structure of extra-tropical Rossby waves
Y. Ashkenazy, N. Paldor, and Y. Zarmi, Tellus 63A, 817-827 (2011), doi: 10.1111/j.1600-0870.2011.00516.x.

Seasonality effects on nonlinear properties of hydrometeorological records
V.N. Livina, Y. Ashkenazy, A. Bunde, and S. Havlin, In Extremis: Disruptive Events and Trends in Climate and Hydrology (Eds. J. Kropp & H. J. Schellnhuber), Springer (2011).

The effect of Milankovitch variations in insolation on equatorial seasonality
Y. Ashkenazy, I. Eisenman, H. Gildor, and E. Tziperman, Journal of Climate 23 (23), 6133-6142 (2010).

Preservation of long range temporal correlations under extreme random dilution
D. Mirzayof and Y. Ashkenazy, Physica A 389 (24), 5573-5580 (2010).

Long-range temporal correlations of ocean surface currents,
Y. Ashkenazy and H. Gildor, Journal of Geophysical Research 114, C09009 (2009), doi:10.1029/2008JC005235.

Sand dune dynamics and climate change: A modeling approach
H. Yizhaq, Y. Ashkenazy, and H. Tsoar, Journal of Geophysical Research 114, F01023 (2009), doi:10.1029/2008JF001138.

Settlement fluctuations and environmental changes in Israel's coastal plain during the early bronze age
A. Faust and Y. Ashkenazy, Levant 41 (1), 19-39 (2009), doi: 10.1179/175638009x448230.

Asymmetry of daily temperature records
Y. Ashkenazy, Y. Feliks, H. Gildor, E. Tziperman, Journal of Atmospheric Sciences 65 (10), 3327-3336 (2008), doi:10.1175/2008JAS2662.1.

Wind spatial variability and topographic wave frequency
E. Shilo, Y. Ashkenazy, A. Rimmer, S. Assouline, and Y. Mahrer, Journal of Physical Oceanography 38 (9), 2085-2096 (2008), doi:10.1175/2008JPO3886.1.

Volatility of fractal and multifractal time series
T. Kalisky, Y. Ashkenazy, and S. Havlin, Israel Journal of Earth Sciences 56, 47-56 (2008).

The timing and significance of maximum and minimum equatorial insolation
Y. Ashkenazy and H. Gildor, Paleoceanography 23, PA1206 (2008), doi:10.1029/2007PA001436.

The effect of wind variability on topographic waves: Lake Kinneret case
E. Shilo, Y. Ashkenazy, A. Rimmer, S. Assouline, P. Katsafados and Y. Mahrer, Journal of Geophysical Research - Oceans 112, C12024 (2007), doi:101029/2007JC004336.

Why do active and stabilized dunes coexist under the same climatic conditions?
H. Yizhaq, Y. Ashkenazy, and H. Tsoar, Physical Review Letters 98(18), 188001 (2007), doi: 10.1103/PhysRevLett.98.188001

Excess in precipitation as a cause for settlement decline along the Israeli coastal plain during the fifth millennium BP
A. Faust and Y. Ashkenazy, Quaternary Research 68, 37-44 (2007), doi:10.1016/j.yqres.2007.02.003.
See also Haaretz Hebrew/English story; available also here.

A wind-induced thermohaline circulation hysteresis and millennial variability regimes
Y. Ashkenazy and E. Tziperman, Journal of Physical Oceanography 37 (10), 2446-2457 (2007).

The role of phase locking in a simple model for glacial dynamics,
Y. Ashkenazy, Climate Dynamics 27(4), 421-431 (2006), doi: 10.1007/s00382-006-0145-5.

Scenarios regarding the lead of equatorial sea surface temperature over global ice volume
Y. Ashkenazy and E. Tziperman, Paleoceanography 21, PA2006, doi:10.1029/2005PA001232, (2006).

Volatility of Linear and Nonlinear Time Series
T. Kalisky, Y. Ashkenazy, and S. Havlin, Physical Review E 72, 011913 (2005).

Simple stochastic models for glacial dynamics
Y. Ashkenazy, D. R. Baker, and H. Gildor, Journal of Geophysical Research - Oceans, 110 (C2), C02005, doi:10.1029/2004JC002548, (2005).

Are the 41kyr glacial oscillations a linear response to Milankovitch forcing?
Y. Ashkenazy and E. Tziperman, Quaternary Science Reviews, 23(18-19), 1879-1890 (2004).

Nonlinearity and multifractality of climate change in the past 420,000 years,
Y. Ashkenazy, D.R. Baker, H. Gildor, S. Havlin, Geophysical Research Letters 30(22), 2146, doi:10.1029/2003GL018099 (2003).

Nonlinear Volatility of River Flux Fluctuations,
V.N. Livina, Y. Ashkenazy, P. Braun, R. Monetti, A. Bunde, S. Havlin,
Phys. Rev. E 67, 042101 (2003).

Multifractality of Price Fluctuations --- Stocks versus Commodities,
K. Matia, Y. Ashkenazy, H.E. Stanley,
Europhysics Lett. 61, 422-426 (2003).

Magnitude and Sign Scaling in Power-Law Correlated Time Series,
Y. Ashkenazy, S. Havlin, P.Ch. Ivanov, C.-K. Peng,
V. Schulte-Frohlinde, H. E. Stanley, Physica A 323, 19-41 (2003).

Correlation Differences in Heartbeat Fluctuations During Rest and Exercise,
R. Karasik, N. Sapir, Y. Ashkenazy, P.Ch. Ivanov, I. Dvir, P. Lavie, S. Havlin,
Phys. Rev. E 66, 062902 (2002).

Multifractal Chaotic Attractors in a System of Delay-Differential
Equations Modeling Road Traffic,
L.A. Safonov, E. Tomer, V.V. Strygin, Y. Ashkenazy, S. Havlin,
Chaos 12, 1006-1014 (2002).

The Radiative Kicked Oscillator: A Stochastic Web or Chaotic Attractor ?
Y. Ashkenazy and L.P. Horwitz, Fractals 10, 353-371 (2002)

Complex PAtterns of Abnormal Heartbeats,
V. Schulte-Frohlinde, Y. Ashkenazy, A.L. Goldberger, P.Ch. Ivanov, M. Costa,
A. Morley-Davies, H.E. Stanley, L. Glass, Phys. Rev. E 66, 031901 (2002).

A Model for Cardio-Respiratory Synchronization in Humans,
K. Kotani, K. Takamasu, Y. Ashkenazy, H.E. Stanley, Y. Yamamoto,
Phys. Rev. E 65, 051923 (2002).

Characterization of Sleep Stages by Correlations of Heartbeat
Increments,
J.W. Kantelhardt, Y. Ashkenazy, P.Ch. Ivanov, A. Bunde, S. Havlin,
T. Penzel, J.-H. Peter, H.E. Stanley, Phys. Rev. E 65, 051908 (2002).

Delay-Induce Chaos with Multifractal Attractor in a Traffic Flow Model,
L.A. Safonov, E. Tomer, V.V. Strygin, Y. Ashkenazy, and S. Havlin,
Europhysics Lett. 57, 151-158 (2002).

A Stochastic Model of Human Gait Dynamics,
Y. Ashkenazy, J.M. Hausdorff, P.Ch. Ivanov, H.E. Stanley,
Physica A 316, 662-670 (2002).

Chaotic Enhancement of Decay. The Effect of Classical Phase Space
Structures
Y. Ashkenazy, L Bonci, J. Levitan, and R. Roncaglia, Phys. Rev. E 64,
056215 (2001).

Noise Effects on the Complex Patterns of Abnormal Heartbeats,
V. Schulte-Frohlinde, Y. Ashkenazy, P.Ch. Ivanov, L. Glass,
A.L. Goldberger, H.E. Stanley , Phys. Rev. Lett. 87, 068104 (2001).

Magnitude and Sign Correlations in Heartbeat Fluctuations,
Y. Ashkenazy, P.Ch. Ivanov, S. Havlin, C.-K. Peng, A.L. Goldberger, and
H.E. Stanley, Phys. Rev. Lett. 86, 1900-1903 (2001).
See also Physics-Central story

Scale Specific and Scale Independent Measures of Heart Rate Variability
as Risk Indicators,
Y. Ashkenazy, M. Lewkowicz, J. Levitan, S. Havlin, K. Saermark,
H. Moelgaard, P.E. Bloch Thomsen, M. Moller, U. Hintze, and H. Huikuri,
Europhysics Lett. 53, 709-715 (2001).

Calculation of Energy Spectrum and Eigenstates of 1D Time-Independent
Short Range Potentials
Y. Ashkenazy and L.P. Horwitz, Physica A 293, 189-199 (2001).

Chaos and Maps in Relativistic Dynamics Systems,
L.P. Horwitz and Y. Ashkenazy, Discrete Dynamics in Nature and
Society 4, 77-86 (2000).

The Effect of Radiation on the Stochastic Web,
Y. Ashkenazy and L.P. Horwitz, Discrete Dynamics in Nature and
Society 4, 283-292 (2000).

Fourier Analysis of Light Scattered by Elongated Scatterers.
Z. Schiffer, Y. Ashkenazy, R. Tirosh, and M. Deutsch
Applied Optics 38, 3626 (1999).

Discrimination between Healthy and Sick Cardiac Autonomic Nervous System by
Detrended Heart Rate Variability Analysis
Y. Ashkenazy, M. Lewkowicz, J. Levitan, S. Havlin,
K. Saermark, H. Moelgaard, and A. Bloch Thomsen
Fractals 7, 85 (1999).

The Use of Generalized Information Dimension in Measuring Fractal Dimension
of Time Series
Y. Ashkenazy
Physica A 271, 427-447 (1999).

Discrimination of the healthy and sick cardiac autonomic nervous system by a
New wavelet analysis of heartbeat intervals
Y. Ashkenazy, M. Lewkowicz, J. Levitan,
H. Moelgaard, A. Bloch Thomsen and K. Saermark
Fractals 6, (1998) 197-203.

Chaos of the Relativistic Forced van der Pol Oscillator
Y. Ashkenazy, C. Goren and L. P. Horwitz
Phys. Lett. A 243, (1998) 195-204.

A New Time-Scale for Tunnelling
E. Eisenberg and Y. Ashkenazy
Found. Phys. 27, 191 (1997).

Enhancement of Decoherence by Chaotic-Like Behaviour
J. Levitan, M. Lewkowicz and Y. Ashkenazy
Found. Phys. 27, 203 (1997).

Complexity, Tunnelling and Geometrical Symmetry
L. P. Horwitz, J. Levitan and Y. Ashkenazy
Phys. Rev. E 55, 3697 (1997).

The Necessity for a Time Local Dimension in Systems with
Time-Varying Attractors
K. Saermark, Y. Ashkenazy, J. Levitan and M. Lewkowicz
Physica A 236, 363 (1997).

Chaotic Signatures in the Spectrum of a Quantum Double Well
R. Berkovits, Y. Ashkenazy, L. P. Horwitz, and J. Levitan
Physica A 238, 279 (1997).

Chaoticlike Behaviour in a Quantum System without Classical
Counterpart
Y. Ashkenazy, L. P. Horwitz, J. Levitan, M. Lewkowicz, and Y. Rothschild
Phys. Rev. Lett. 75, 1070 (1995).
 
Proceedings

Statistical Properties of Commodity Price Fluctuations,
K. Matia, Y. Ashkenazy, L. A. N. Amaral, S. P. Goodwin, and H. E. Stanley, in Proceedings of the Second Nikkei Econophysics Research Workshop and Symposium, Tokyo, 12-14 November 2002, edited by H. Takayasu (Springer-Verlag, Berlin, 2004), pp. 192-197.

Chaos and multifractality in a time-delay car-following traffic model,
L.A. Safonov, E. Tomer, V.V. Strygin, Y. Ashkenazy, S. Havlin, (Editors: M. Fukui, Y. Sugiyama, M. Schreckenberg, and D.E. Wolf) Traffic and Granular flow', 119-124 (2003). 4th International Conference on Traffic and Granular Flow Nagoya Univ., Nagoya, Japan, Oct. 15-17, 2001

Nonlinear Volatility of river flux fluctuations,
V.N. Livina, Y. Ashkenazy, A. Bunde, S. Havlin, Bulletin of the Israel Physical Society 49, 46 (2003).

A stochastic model of river discharge fluctuations,
V.N. Livina, Y. Ashkenazy, Z. Kizner, V. Strygind, A. Bunde, S. Havlin, Physica A 330, 283-290 (2003).

Quantifying heartbeat dynamics by magnitude and sign correlations
P.Ch. Ivanov, Y. Ashkenazy, J.W. Kantelhardt, and H.E. Stanley, AIP Conf. Proc., 665, 383-391 (2003).

When Human Walking Becomes Random Walking: Fractal Analysis and Modeling
of Gait Rhythm Fluctuations,
J.M. Hausdorff, Y. Ashkenazy, C.-K. Peng, P.Ch. Ivanov, H.E. Stanley,
and A.L. Goldberger, Physica A 302, 138-147 (2001).

Decomposition of Heartbeat Time Series: Scaling Analysis of the Sign
Sequence,
Y. Ashkenazy, P.Ch. Ivanov, S. Havlin, C.-K. Peng, Y. Yamamoto,
A.L. Goldberger, and H.E. Stanley, Computers in Cardiology 2000;
27:139-143.

Finding Hidden Patterns in Complex Ventriculer Ectopy,
V. Schulte-Frohlinde, Y. Ashkenazy, P.Ch. Ivanov, A. Morley-Davies,
L. Glass, A.L. Goldberger, and H.E. Stanley, Computers in Cardiology
2000; 27:335-339.

Application of Statistical Physics to Heartbeat Diagnosis,
S. Havlin, L.A.N. Amaral, Y. Ashkenazy, A.L. Goldberger, P.Ch. Ivanov,
C.-K. Peng, and H.E. Stanley, Physica A 274, 99 (1999).

Chaos and Decoherence in a Quantum System with a Regular Classical Counterpart,
Y. Ashkenazy, M. Lewkowicz and J. Levitan
in : New Developments on Fundamental Problems in Quantum Physics,
eds. M. Ferrero and A. van der Merwe,
(Kluwer Academic Publishers, Dordrecht, 1997).

Submitted papers

Variability, instabilities and eddies in a Snowball ocean
Y. Ashkenazy and E. Tziperman, submitted to Journal of Climate.

Does the deep equatorial Pacific ridge affect El-Nino?
Y. Wang, A. Gozolchiani, Y. Ashkenazy, and S. Havlin, submitted to Nature Geoscience.

Misc

PhD Thesis: The Quantum-Classical Relation Through Chaos Theory, (1999).

Relation between Magnitude Series Correlations and Multifractal Spectrum Width, cond-mat/0111396.