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Advances in Astronomy
Volume 2015 (2015), Article ID 438124, 9 pages
Research Article

Coronal Holes in Global Complexes of Activity

IZMIRAN, Kaluzhskoe Shosse 4, Troitsk, Moscow 142190, Russia

Received 17 April 2015; Accepted 28 June 2015

Academic Editor: Alberto J. Castro-Tirado

Copyright © 2015 Vladimir N. Obridko and Bertha D. Shelting. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We propose a new concept that considers the global complexes of activity as a combination of global and local fields. Traditionally, the complexes of activity have been identified from observations of active regions (ARs). Here, we show that a complex of activity comprises both (AR) and coronal holes (CHs). Our analysis is based on observations of magnetic fields of various scales, SOHO/MDI data, and UV observations of CH. The analysis has corroborated the existence of complexes of activity that involve AR and equatorial CH. Both AR and CH are embedded in an extended magnetic region dominated by the magnetic field of one sign, but not strictly unipolar. It is shown that the evolution of CH and AR is a single process. The relationship between the fields of various scales in the course of a cycle is discussed.