The Declining and Minimum Phase of Solar Cycle 23

Details The Declining and Minimum Phase of Solar Cycle 23 The Declining and Minimum Phase of Solar Cycle 23

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...210.9208d&link_type=abstract

American Astronomical Society Meeting 210, #92.08; Bulletin of the American Astronomical Society, Vol. 39, p.210

Astronomy and Astrophysics

Astronomy

Scientific paper

Solar Cycle 23 has been a weaker magnetic cycle when compared to Cycles 22 and 21. The lower rate of sunspot emergence and the lack of large spot groups combined with the slower meridional flow observed during most of the cycle resulted in a slower magnetic polar reversal and a longer than average cycle. We are currently observing the slow decline of Cycle 23 towards its minimum phase but comparison to previous cycles suggests that solar minimum is still many months away.
We will examine the declining phase of Cycle 23 and compare it to the similar phase of preceding cycles. For this purpose, we will analyze a wide range of solar observations from the photosphere to the corona. We will consider traditional solar activity indices, such as the photospheric magnetic flux, sunspots, F10.7 and MgII indices but we will also include in our study the coronal morphology and brightness, the distribution of coronal holes, and the polar magnetic flux.

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