Global evolution of interplanetary sector structure, coronal holes, and solar wind streams During 1976‐1993: Stackplot displays based on solar magnetic observations

We use potential field calculations and solar magnetic observations during 1976-1993 to infer the evolution of interplanetary sector structure, coronal holes, and solar wind streams at heliographic latitudes ranging from 80°S to 80°N. The results are presented in the form of stackplots, which show long-lived patterns that rotate quasi-rigidly at rates determined by the photospheric distribution of nonaxisymmetric magnetic flux. The fastest wind streams and their coronal hole sources form slowly rotating patterns near the poles just after sunspot maximum but migrate to lower latitudes and tend to rotate at near-equatorial rates as sunspot activity declines.

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