A cause of solar wind speed variations observed at 1 A.U

Details A cause of solar wind speed variations observed at 1 A.U A cause of solar wind speed variations observed at 1 A.U

Mar 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.1290h&link_type=abstract

Journal of Geophysical Research, vol. 86, Mar. 1, 1981, p. 1290-1298.

Physics

48

Earth Environment, Interplanetary Magnetic Fields, Solar Cycles, Solar Wind Velocity, Annual Variations, Current Sheets, Polarity, Twenty-Seven Day Variation

Scientific paper

An attempt is made to interpret solar wind variations observed at the earth's distance, namely the solar cycle variations, the semi-annual variations, and the 27-day variations, as well as the polarity changes of the interplanetary magnetic field, mainly in terms of two effects, a positive latitudinal gradient of the solar wind speed and a wobbling solar dipole, combined with the annual (heliospheric) latitudinal excursion of the earth. It is shown that a significant part of the solar wind variations observed at the earth's distance and the changes of polarity pattern of the interplanetary magnetic field can be reasonably well reproduced by the two effects.

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