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The contraction and disappearance of the polar coronal holesHe I 10830 A spectroheliograms obtained during 1974-1979 were used to study the evolution of the Sun's polar coronal holes. Synoptic polar plots show that the holes have decreased in size to the point that only vestigual holes remain and even these remnants fluctuate with detailed sunspot activity.
Document ID
19800009698
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sheeley, N. R., Jr. (Naval Research Lab. Washington, DC, 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
80N17960
Funding Number(s)
CONTRACT_GRANT: NASA ORDER W-14429
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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IDRelationTitle19800009682Collected WorksStudy of the Solar Cycle from Space
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