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《Chinese Journal of Geophysics》 1983-05
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A MODEL FOR THE RADIAL VARIATION OF THE POWER SPECTRA OF THE IMF FLUCTUATIONS

TU CHUAN-YI (Department of Geophysics, Pelting University)  
A model for the radial variation of the power spectrum of the IMP fluctuations is presented in this paper. The basic idea is that the fluctuations in the frequency range round 10-4Hz propagating from the sun to the earth's orbit are nearly as predicted by the WKB Alfvén waves model, but a small part of energy cascades into the frequency range above 10-3 Hz, in which the fluctuations are controlled by the cascading process-Based on this idea, a power spectrum equation of the IMP fluctuations including a cascading term is presented and numerical solutions of the spectrum equation are given. The solutions show that the slope of the spectrum in the frequency range higher than 10-2 Hz nearly remains -1.6 while the slope of the spectrum in the low frequency range around 10-3 Hz increases from 0.3 AU to 1 AU. The average spectrum density over the frequency range 2.8×10-4Hz- 2.5×10-3 Hz varies with distance as r-3.5 while that over 1.0 × 10-2 Hz-8.3×10-2 Hz as r-4.1 in the space 0.3 AU to 1 AU. All of the properties calculated are consistent with the radial evolution of the power spectrum of IMP fluctuations first observed by Helios 1 and Helios 2 (Bavassano, 1982). The numerical solution shows that the energy flux of the fluctuations near the sun is of the order of 104 erg cm-2s-1, that is, the same as the wave energy flux some solar wind theories seem to require.
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【References】
Chinese Journal Full-text Database 4 Hits
1 Tu Chuanyi (Department of Geophysics);Discussion about the resonance acceleration and heating of the solar wind ions and the three time-scales system[J];Acta Scicentiarum Naturalum Universitis Pekinesis;1988-05
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 Liu Zhen-xing (Institute of Space Physics, Academia, Sinica);ON TURBULENCE STRUCTURE OF MESOSPHERIC AND THERMOSPHERIC ATMOSPHERES[J];Chinese Journal of Geophysics;1980-02
2 An Yingqi;The Response of a Class of Non-linear Systems to Random Earthquake Excitation[J];;1989-04
3 BAO Zhong-you(School of Civil and Arc., East China Jiaotong Univ., Nanchang 330013,China);Flexural Vibration of Non-linear Beam with the Random Load (I)[J];Journal of East China Jiaotong University;2005-02
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10 Lai Guowei Lu Shuyuan (Wuhan University of Hydraulic and Electric Engineering);Combining randon Simulation with elasto plastic FEM for rock masses[J];Journal of Hydraulic Engineering;1991-10
【Co-references】
Chinese Journal Full-text Database 10 Hits
1 LIU CHUAN-XIN (Institute of Geophysics and Meteorology, Academia SInica);A NOTE ON THE CORRELATION BETWEEN THE CORONAL GREEN LINE AND GEOMAGNETIC ACTIVITY[J];Chinese Journal of Sinica;1961-01
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【Secondary References】
Chinese Journal Full-text Database 8 Hits
1 Tu Chuanyi Lin yu Department of Geophysics;The Explaination of the Radial Variation of the Proton Temperature in the Space Range Between 1AU-5AU[J];Acta Scicentiarum Naturalum Universitis Pekinesis;1987-03
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7 Tu Chuan-yi Li Man-ke(Department of Geophysics, Peking University, Beijing 100871);THE HEATING OF SOLAR WIND PROTONS THROUGH ENERGY CASCADE OF ALFVENIC FLUCTUATIONS[J];Chinese Journal of Space Science;1993-04
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China Proceedings of conference Full-text Database 1 Hits
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【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
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