caa a22 4500 445346450 CHVBK 20180317142830.0 cr unu---uuuuu 170323e20110901xx s 000 0 eng 10.1007/s11207-011-9827-1 doi (NATIONALLICENCE)springer-10.1007/s11207-011-9827-1 Did the Sun Change Its Behaviour During the Decline of Cycle 23 and Into Cycle 24? [Elektronische Daten] [K. Tapping, J. Valdés] The activity minimum between the end of cycle23 and the beginning of cycle24 was the longest and deepest since at least the beginning of the 20th century. This has led to speculation that the Sun is changing its behaviour. The sunspot number and 10.7-cm solar radio flux indices have traditionally been highly correlated, so a change in the relationship between them might flag at such a change. An examination of this relationship suggests a significant change in the relationship between activity in the photosphere and in the chromosphere/corona happened soon after the maximum of cycle23 and has continued into cycle24. However, there are indications of change as early as 1980. Springer Science+Business Media B.V., 2011 10.7-cm solar radio flux nationallicence Sunspot number nationallicence Activity indices nationallicence Tapping K. Herzberg Institute of Astrophysics, National Research Council, P.O. Box 248, V2A 6J9, Penticton, British Columbia, Canada aut Valdés J. Institute for Information Technology, National Research Council, K1A 0R6, Ottawa, Ontario, Canada aut Solar Physics Springer Netherlands 272/2(2011-09-01), 337-350 0038-0938 272:2<337 2011 272 11207 https://doi.org/10.1007/s11207-011-9827-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11207-011-9827-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tapping K. Herzberg Institute of Astrophysics, National Research Council, P.O. Box 248, V2A 6J9, Penticton, British Columbia, Canada aut NATIONALLICENCE 700 1- Valdés J. Institute for Information Technology, National Research Council, K1A 0R6, Ottawa, Ontario, Canada aut NATIONALLICENCE 773 0- Solar Physics Springer Netherlands 272/2(2011-09-01), 337-350 0038-0938 272:2<337 2011 272 11207 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer