The evolution of the polar coronal holes

Details The evolution of the polar coronal holes The evolution of the polar coronal holes

Mar 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980soph...65..229s&link_type=abstract

Solar Physics, vol. 65, Mar. 1980, p. 229-235. NOAA-supported research;

Physics

9

Coronal Holes, Long Term Effects, Solar Activity, Sunspot Cycle, Astronomical Maps, Morphology, Polar Regions, Solar Magnetic Field

Scientific paper

He I 10830 A synoptic maps, obtained at the Kitt Peak National Observatory during 1974-1979, show that the sun's polar coronal holes have contracted significantly during 1977-1978. Prior to the accelerated increase of sunspot activity in mid-1977, the area of each polar cap was on the order of 8% of the sun's total surface area, whereas toward the end of 1978 these areas fell below 2% of the total surface area. Synoptic polar plots show that the vestigial holes had irregular shapes and were often well removed from the poles themselves. These results are consistent with the changes that one would expect when the polar magnetic fields are weakening just prior to sunspot maximum

Affiliated with

Also associated with

No associations

Rating

The evolution of the polar coronal holes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The evolution of the polar coronal holes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The evolution of the polar coronal holes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1575553