http://www.cnr.it/ontology/cnr/individuo/prodotto/ID5991
On the properties of turbulent boundary layer over polar cusps (Articolo in rivista)
- Type
- Label
- On the properties of turbulent boundary layer over polar cusps (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Savin S., et al. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Note
- ISI Web of Science (WOS) (literal)
- Titolo
- On the properties of turbulent boundary layer over polar cusps (literal)
- Abstract
- We study properties of nonlinear magnetic fluctuations in the turbulent boundary layer (TBL) over polar cusps
during a typical TBL crossing on 19 June 1998. Interball-1 data in the summer TBL are compared with that of
Geotail in solar wind (SW) and Polar in the northern TBL. In the TBL two characteristic slopes are seen: =-1 at
(0.0040.08) Hz and =-2.2 at (0.082) Hz. We present evidences that random current sheets with features of
coherent solitons can result in: (i) slopes of * 1 in the magnetic power spectra;
(ii) demagnetization of the SW plasma in diamagnetic bubbles; (iii) nonlinear, presumably, 3-wave phase coupling
with cascade features; (iiii) departure from the Gaussian statistics. We discuss the above TBL properties in terms
of intermittency and self-organization of nonlinear systems, and compare them with kinetic simulations of
reconnected current sheet at the nonlinear state. Virtual satellite data in the model current sheet reproduce
valuable cascade-like spectral and bi-spectral properties of the TBL turbulence.
(literal)
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