Thumbnail
Access Restriction
Open

Author Roberts, D. A. ♦ Goldstein, M. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ SOLAR WIND ♦ TURBULENCE ♦ DATA ANALYSIS ♦ FLUCTUATIONS ♦ INTERPLANETARY MAGNETIC FIELDS ♦ INTERPLANETARY SPACE ♦ MAGNETOHYDRODYNAMICS ♦ SHOCK WAVES ♦ SPECTRA ♦ TIME-SERIES ANALYSIS ♦ VELOCITY ♦ VOYAGER SPACE PROBES ♦ FLUID MECHANICS ♦ HYDRODYNAMICS ♦ MAGNETIC FIELDS ♦ MATHEMATICS ♦ MECHANICS ♦ SOLAR ACTIVITY ♦ SPACE ♦ SPACE VEHICLES ♦ VARIATIONS ♦ VEHICLES ♦ Auroral, Ionospheric, & Magnetospheric Phenomena- (1992-)
Abstract The low-frequency power spectra of the magnitude of the magnetic and velocity fields in the solar wind frequently have a somewhat steeper than f{sup {minus}2} dependence, whereas the vector components of these quantities often have spectra characteristic of turbulence (f{sup {minus}5/3}) with a break to a flatter spectrum at lower frequencies. It is shown here that, consistent with a suggestion of Surlaga and Mish, the f{sup {minus}2} spectra in the magnitudes result from jumps due to various rapid changes in the time series for these quantities. If these jumps are removed from the data, the spectra of the resulting difference time series have the f{sup {minus}5/3} form. The authors conclude that f{sup {minus}2} spectra in the magnitudes of the magnetic field and velocity in the solar wind arise from phase coherent structures that can be distinguished clearly from incoherent turbulent fluctuations.
ISSN 01480227
Educational Use Research
Learning Resource Type Article
Publisher Date 1987-09-01
Publisher Place United States
Journal Journal of Geophysical Research
Volume Number 92
Issue Number A9


Open content in new tab

   Open content in new tab