Complex Flows & Non Linear Time Series Analysis

The experimental study of nonlinear and complex systems relies on the design of specific advanced data analysis tools, which need to be able to identify properties of the dynamics which are often subtle, hidden in chaotic motions, or simply by the noise. In such cases, it is necessary to use appropriate techniques that also need to be benchmarked for a quantitative reliability. These techniques, often based on advanced statistical and mathematical tools, can be then applied on suitable systems to provide important validation or input for theoretical models and numerical simulations.


Solar flares and the Sun-Earth connection. In recent years, the study of solar variability and its influence on Earth has increased, both because of a more compelling need for a good protection against solar storms that arise from the massive use of the modern technology, and for the exponential quantitative and qualitative increase of measurements available. Our approach is based on the exploitation of in-situ and remote measurements of the Sun-Earth system, including remote solar imaging, magnetic field, and energetic particles, and solar wind and magnetospheric in situ and remote measurements. The main research topics concern the dynamics of the solar active regions and their relationship with flaring activity through the analysis of the complexity of the magnetic field configuration in flaring active regions [Sorriso-Valvo et al., 2015]. Other studies concern the interpretation in terms of coupling models is also studied from data, for example through the analysis of proper modes [Vecchio et al., 2005].


Geophysical time series analysis. Several geophysical systems can be studied in the framework of complex systems and nonlinear dynamics. Examples are: earthquakes [Carbone et al., 2005], geomagnetic field reversals [Carbone et al., 2006], geomagnetic activity. These phenomena often can be observed as time series, which can be thus studied using, e.g., statistical tools. Their description is useful to validate theoretical models, to advance the general knowledge of the process, and to some extent to help improving the predictability of catastrophic events. Time series of various phenomena are studied and their statistical properties assessed.


Facilities & Lab

LiCryL @ Rende (CS)




CNR Researcher


  1. F. Pucci, F. Malara, S. Perri, G. Zimbardo, L. Sorriso-Valvo and F. Valentini, Energetic particle transport in the presence of magnetic turbulence: influence of spectral extension and intermittency, Month. Notes R. Astron. Soc. 459, 3395 (2016), DOI: 10.1093/mnras/stw877.
  2. E. Leonardis, L. Sorriso-Valvo, F. Valentini, S. Servidio, F. Carbone and P. Veltri, Multifractal scaling and intermittency in hybrid Vlasov-Maxwell simulations of plasma turbulence, Physics of Plasmas, 23, 022307 (2016), DOI: 10.1063/1.4942417.
  3. C. Rossi, F. Califano, A. Retinò, L. Sorriso-Valvo, P. Henri, S. Servidio, F. Valentini, A. Chasapis, and L. Rezeau, Two-fluid numerical simulations of turbulence inside Kelvin-Helmholtz vortices: intermittency and reconnecting current sheets, Physics of Plasmas, 22, 122303 (2015), DOI: 10.1063/1.4936795.
  4. F. Carbone, F. Ciuchi, A. Mazzulla, L. Sorriso-Valvo, Anomalous Scaling, Intermittency and Turbulence in Nematic Liquid Crystals, Molecular Crystals and Liquid Crystals, 614, 67 (2015), DOI: 10.1080/15421406.2015.1049911.
  5. G. De Vita, A. Vecchio, L. Sorriso-Valvo, C. Briand, L. Primavera, S. Servidio, F. Lepreti and V. Carbone, Cancellation analysis of current density in solar active region NOAA10019, Journal of Space Weather and Space Climate, 5, A28 (2015), DOI: 10.1051/swsc/2015029.
  6. L. Sorriso-Valvo, R. Marino, L. Lijoi, S. Perri and V. Carbone, Self-consistent Castaing distribution of solar wind turbulent fluctuations, The Astrophysical Journal, 807, 86 (2015), DOI: 10.1088/0004-637X/807/1/86.
  7. A. Chasapis, A. Retinò, F. Sahraoui, A. Vaivads, Y. Khotyaintsev, D. Sundkvist, A. Greco, L. Sorriso-Valvo, P. Canu, Thin current sheets and associated electron heating in turbulent space plasma, The Astrophysical Journal Letters 804, L1 (2015), DOI: 10.1088/2041-8205/804/1/L1.
  8. E. Yordanova, S. Perri, L. Sorriso-Valvo and V. Carbone, Multipoint observation of anisotropy and intermittency in solar-wind turbulence, EPL 110, 19001 (2015), DOI: 10.1209/0295-5075/110/19001.
  9. L. Sorriso-Valvo, G. De Vita, M. Kazachenko, S. Krucker, L. Primavera, S. Servidio, A. Vecchio, B. Welsch, G. Fisher, F. Lepreti, V. Carbone, Sign singularity and flares in solar active region NOAA 11158, The Astrophysical Journal 801, 36 (2015), DOI: 10.1088/0004-637X/801/1/36.
  10. G. De Vita, L. Sorriso-Valvo, F. Valentini, S. Servidio, L. Primavera, V. Carbone and P. Veltri, Analysis of cancellation exponents in two-dimensional Vlasov turbulence, Physics of Plasmas 21, 072315 (2014), DOI: 10.1063/1.4891339.
  11. F. Carbone and L. Sorriso-Valvo, Experimental analysis of intermittency in electrohydrodynamic instability, European Journal of Physics E 37, 61 (2014), DOI: 10.1140/epje/i2014-14061-x.
  12. C. H. K. Chen, L. Sorriso-Valvo, J. Safrankova, Z. Nemecek, Intermittency of solar wind density fluctuations from ion to electron scales, The Astrophysical Journal Letter 789, L8 (2014), DOI: 10.1088/2041-8205/789/1/L8.
  13. R. Bruno, D. Telloni, L. Primavera, E. Pietropaolo, R. D’Amicis, L. Sorriso-Valvo, V. Carbone, F. Malara and P. Veltri, Radial evolution of intermitency of density fluctuations in the fast solar wind, The Astrophysical Journal 786, 53 (2014), DOI: 10.1088/0004-637X/786/1/53.

Other Selected Publication

  1. T. Dudok de Wit, O. Alexandrova, I. Furno, L. Sorriso-Valvo, G. Zimbardo, Methods for Characterising Microphysical Processes in Plasmas, Space Science Reviews 178, 693 (2013), DOI: 10.1007/978-1-4899-7413-6_21.
  2. R. Marino, L. Sorriso-Valvo, R. D’Amicis, V. Carbone, R. Bruno, P. Veltri, On the occurrence of the third-order scaling in high latitude solar wind, The Astrophysical Journal 750, 41 (2012), DOI: 10.1088/0004-637X/750/1/41.
  3. F. Carbone, L. Sorriso-Valvo, C. Versace, G. Strangi, R. Bartolino, Anisotropy of Spatiotemporal Decorrelation in Electrohydrodynamic Turbulence, Physical Reviews Letters 106, 114502 (2011), DOI: 10.1103/PhysRevLett.106.114502.
  4. V. Carbone, R. Marino, L. Sorriso-Valvo, A. Noullez, R. Bruno, Scaling laws of turbulence and heating of fast solar wind: the role of density fluctuations, Physical Review Letters 103, 061102 (2009), DOI: 10.1103/PhysRevLett.103.061102.
  5. R. Marino, L. Sorriso-Valvo, V. Carbone, A. Noullez, R. Bruno and B. Bavassano, Heating the solar wind by a magnetohydrodynamic turbulent cascade, The Astrophysical Journal Letters 677, L71-L74 (2008), DOI: 10.1086/587957.
  6. O. Alexandrova, V. Carbone, P. Veltri, L. Sorriso-Valvo, Small-scale energy cascade of the solar wind turbulence, The Astrophysical Journal 674, 1153-1157 (2008), DOI: 10.1086/524056.
  7. L. Sorriso-Valvo, R. Marino, V. Carbone, A. Noullez, F. Lepreti, P. Veltri, R. Bruno, B. Bavassano, E. Pietropaolo, Observation of Inertial Energy Cascade in Interplanetary Space Plasma, Physical Review Letters 99, 115001-1-115001-4 (2007), DOI: 10.1103/PhysRevLett.99.115001.
  8. V. Carbone, L. Sorriso-Valvo, A. Vecchio, F. Lepreti, P. Veltri, P. Harabaglia, I. Guerra, Clustering of Polarity Reversals of the Geomagnetic Field, Physical Review Letters 96, 128501-1-128501-4 (2006), DOI: 10.1103/PhysRevLett.96.128501.
  9. V. Carbone, L. Sorriso-Valvo, E. Martines, V. Antoni, P. Veltri, Intermittency and turbulence in a magnetically confined fusion plasma, Physical Review E 62, R49-R52 (2000), DOI: 10.1103/PhysRevE.62.R49.
  10. L. Sorriso-Valvo, V. Carbone, P. Veltri, G. Consolin, R. Bruno, Intermittency in the solar wind turbulence through probability distribution functions of fluctuations, Geophysical Research Letters 26, 1801-1804 (1999), DOI: 10.1029/1999GL900270.


Turboplasmas: FP7 European Marie Curie IRSES 2010-269297, 2011-2014.

Anisotropy and intermittency in solar wind turbulence – ISSI Team, 2014-2015.

Kinetic Turbulence and Heating in the Solar Wind – ISSI Team, 2013-2014

Statistical mechanics of disordered and complex systems – PRIN2010-2011, 2013-2016

Nanoftalm: Piattaforme tecnologiche innovative per il delivery di farmaci in oftalmologia – PON MIUR, PON_0100110, 2011-2014

CNR Short Term Mobility Program 2014, visiting at Laboratoire de Physique du Plasma, Palaiseau, France, working with Dr. A. Retinò, 2014, 1 month.

CNR Short Term Mobility Program 2015,visiting at University College of London, UK, working with DR. R. WICKS (2015, 1 MONTH).

Latest News


 01 luglio 2019 - ore 14:15


Cnr Nanotec Lecce


Realizzato nell'ambito delle attività del progetto "TecnoMed Puglia - Tecnopolo per la medicina di precisione", il meeting è dedicato allo studio delle malattie neurodegenerative: dai nuovi biomarcatori alle piu recenti modellizzazioni, per una migliore comprensione dei meccanismi di base e quindi per lo sviluppo di terapie sempre più ritagliate sul singolo paziente.

EIT RawMaterials Roadshow

21 giugno 2019 ore 09:00 – 15:00


Lecce, Aula Fermi Edificio Aldo Romano, Campus Ekotecne, Via Lecce-Monteroni


Farà tappa a Lecce il prossimo 21 giugno, presso l’Aula Fermi dell’edificio IBIL all’interno del Campus Ecotekne, l’EIT RawMaterials, la piattaforma per il sostegno all’innovazione finanziata dall’Istituto Europeo di Innovazione e Tecnologia (EIT).


L’EIT ha creato le cosiddette KIC – Knowledge Innovation Community, comunità che mirano alla promozione dell’innovazione e della formazione in Europa in settori cruciali, sostenendo l’imprenditorialità e favorendo il passaggio di nuove idee dalla fase di incubazione al mercato.


La EIT RawMaterials si impegna ad affrontare la sfida globale dell’approvvigionamento delle materie prime in Europa attraverso programmi e progetti che mirano allo sviluppo di tecnologia nell’intera catena di valore delle materie prime: dall’esplorazione delle risorse, all’industria mineraria, dai processi metallurgici alla sostituzione delle materie prime critiche o tossiche, dal riciclo dei materiali dei prodotti a fine vita sino alla progettazione di prodotti per l’economia circolare. Nell’ambito dei programmi di sviluppo a livello regionale, la EIT RawMaterials ha creato un Hub nella Regione Puglia coordinato da ENEA, al fine di incrementare il coinvolgimento degli ecosistemi locali nelle attività della KIC e del suo partenariato.


Il MedinHub avrà inoltre l’obiettivo di raggiungere nuove organizzazioni e promuovere la partecipazione delle industrie e delle PMI più innovative, nonché il coinvolgimento delle prestigiose università e centri di ricerca dell’area.


Link per la registrazione:

NanoInnovation 2019

Il Cnr Nanotec è tra i protagonisti di “NanoInnovation 2019", la manifestazione organizzata dall’Associazione italiana per la ricerca industriale (Airi) e dall’Associazione Nanoitaly, ospitata a Roma dall’11 al 14 giugno. Rivolta a ricercatori, imprenditori, industrie, enti di ricerca, NanoInnovation 2019 si propone come la più importante conferenza sulle nanotecnologie e le tecnologie abilitanti in Italia.


Il programma dettagliato dell’evento è disponibile al link

Tra i partecipanti del Cnr Nanotec:

- Clara Guido, “Non-viral gene delivery using polymeric NPs”;

- LucaLEUZZI, “Overview del progetto ATOM”;

- AlessiaCEDOLA, “La tomografia X e le sue applicazione: dai beni culturali all'industria elettronica”;

- FrancescoMATTEUCCI, “Nanodispositivi per il fotovoltaico integrato”;

- Giuseppe Valerio Bianco, “Chemical strategies to improve CVD graphene’s functionalities in technological applications”