The Solar Polar Field During Solar Cycles 21-23

Details The Solar Polar Field During Solar Cycles 21-23 The Solar Polar Field During Solar Cycles 21-23

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh21a0314h&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH21A-0314

Physics

7524 Magnetic Fields, 7529 Photosphere, 7536 Solar Activity Cycle (2162), 7924 Forecasting (2722)

Scientific paper

Three solar cycles of polar magnetic field observations show intriguing variations in intensity and symmetry. The polar field strength at the current solar minimum is less than half what is was during the previous three cycles. Understanding the origin of these variations is important for making useful predictions of future cycles. High-accuracy low-resolution observations from the Wilcox Solar Observatory (WSO) are compared with high- resolution high-precision observations from the Michelson Doppler Imager (MDI) on SOHO during Solar Cycle 23. Interpreting the measurements of the polar field is problematic; however, analyzing observations made with two very different instruments that suffer from unique systematic effects helps resolve some difficulties.

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