Area of polar coronal holes and sunspot
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I. DorotoviΔ
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Article
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1996
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Springer
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English
β 353 KB
The correlation between the size of polar coronal holes and sunspot numbers has been investigated for the last five solar cycles. The area of polar coronal holes over the period from 1939 to 1993 was derived from ground-based observations of the green coronal line at 530.3 nm (Fe xxv). Correlation a