Other
Scientific paper
Sep 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992esasp.346..127r&link_type=abstract
In ESA, Study of the Solar-Terrestrial System p 127-131 (SEE N93-31674 12-90)
Other
2
Boundary Layer Transition, Extremely Low Radio Frequencies, International Sun Earth Explorers, Magnetopause, Planetary Boundary Layer, Solar Wind, Data Acquisition, Interplanetary Magnetic Fields, Plasma Compression, Plasma Diffusion
Scientific paper
The corrrelations between the position of the magnetopause, the direction of its motion, and the level of Ultra Low Frequency (ULF) fluctuations observed close to this boundary, are studied. Data collected during successive crossings of the magnetopause by the International Sun-Earth Explorer (ISEE) are used to show that when the magnetopause is compressed by the solar wind, there is a high level of ULF fluctuations together with an earthward flux of ions through the boundary; however, when the magnetosphere is expanding the level of ULF fluctuations is lower and there is no inward flux. This suggests that the fluctuations play a significant role in the penetration of solar wind particles through the magnetopause. This case study is extended to other days when multiple magnetopause crossings are observed by ISEE. The role of the position of the magnetopause (absolute distance from Earth) and the possible presence of large scale surface waves are also discussed.
Rezeau Laurence
Roux Alain
Russell Christopher T.
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