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Solar cycle changes in the high latitude solar windMeasurements of the solar wind velocity during the period 1971-79 using the technique of interplanetary scintillation are discussed. The average wind speed was faster than 500 km/s at latitudes above 30 deg for most of 1973-77. The fast polar stream, observed to become much narrower in 1978-79 is examined. The narrowing of the polar streams coincided with the emergence of sunspots at midlatitudes, with the start of the new solar cycle, and with a corresponding contraction of the polar coronal holes. The theory that the solar magnetic field controls the large scale structure of the solar wind is discussed in relation to the results.
Document ID
19800009699
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Rickett, B. J.
(California Univ., San Diego La Jolla, CA, United States)
Coles, W. A.
(California Univ., San Diego La Jolla, CA, United States)
Date Acquired
August 10, 2013
Publication Date
February 1, 1980
Publication Information
Publication: NASA. Goddard Space Flight Center Study of the Solar Cycle from Space
Subject Category
Solar Physics
Accession Number
80N17961
Funding Number(s)
CONTRACT_GRANT: F19628-77-C-0161
CONTRACT_GRANT: NSF ATM-78-06770
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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