HR: 08:30h
AN: NG21A-03    [Abstracts]
TI: Multi-Scale Probability Distributions of Solar Wind Speed and Magnetic Field Strength Fluctuations at 1 AU Described by a Generalized Tsallis PDF
AU: Vinas, A F
EM: Adolfo.Figueroa-Vinas.1@gsfc.nasa.gov
AF: NASA Goddard Space Flight Center, Code 692, Greenbelt, MD 20771 United States
AU: * Burlaga, L F
EM: leonard.f.burlaga@nasa.gov
AF: NASA Goddard Space Flight Center, Code 692, Greenbelt, MD 20771 United States
AB: This paper describes the multi-scale structure of fluctuations in the solar wind speed V and magnetic field strength B at 1 AU in 2003, during the declining phase of the solar cycle 23 and of fluctuations in V during 1999 approaching solar maximum. There were many types of physical structures (intermittent turbulence at the smallest scales; corotating streams, ejecta, compound streams, and interaction regions at intermediate scales; and the collection of streams and ejecta of different sizes and shapes at the largest scales). The probability distribution functions (PDFs) of changes of V and B on scales from 64 sec to 171 days can be described by a generalization of the PDF derived by Tsallis from a non-additive entropy function in the context of nonextensive statistical mechanics.
DE: 2111 Ejecta, driver gases, and magnetic clouds
DE: 2139 Interplanetary shocks
DE: 2149 MHD waves and turbulence
DE: 2164 Solar wind plasma
SC: Nonlinear Geophysics [NG]
MN: 2004 AGU Fall Meeting