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Free Content The global signal of the 11-year sunspot cycle in the stratosphere: Differences between solar maxima and minima

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Based on the data of 4 solar cycles, the global structure of the signal of the 11-year sunspot cycle (SSC) in the stratosphere and troposphere was examined in earlier studies, using correlations between the solar cycle and heights and temperatures at different pressure levels. Here, this work is expanded to show the differences of geopotential heights and temperatures between maxima and minima of the SSC. The global solar signal is shown and the differences between the hemispheres are stressed. It is pointed out that during the northern winter (January/February) the QBO modulates the global solar signal. This study puts the earlier work on a firmer ground and gives the community of modellers, who simulate the solar signal with GCMs, quantitative values for comparison.

Bisher haben wir die globale Struktur des Signals des 11-jährigen Sonnenfleckenzyklus (SFZ) in der Stratosphäre und Troposphäre an Hand von Korrelationen zwischen dem SFZ und Höhen oder Temperaturen in verschiedenen Druckniveaus untersucht. Dazu hatten wir Daten von 4 Zyklen des SFZ zur Verfügung, 1958-1998. Hier wird diese Untersuchung ausgedehnt, indem die Differenzen der geopotentiellen Höhen zwischen den Maxima und Minima im SFZ berechnet werden. Es werden das globale Signal gezeigt, die Unterschiede zwischen den Hemisphären betont, und es wird besonders darauf hingewiesen, dass während des Nordwinters (Januar/Februar) das globale solare Signal in der unteren Stratosphäre von der QBO moduliert wird. Diese Untersuchung liefert quantitative Werte des solaren Signals im 11-jährigen Zyklus, die für Vergleiche mit Modellergebnissen benötigt werden.


Document Type: Research Article


Affiliations: Meteorological Institute, Free University Berlin, Germany

Publication date: 2001-03-01

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  • Meteorologische Zeitschrift (originally founded in 1866) is the joint periodical of the meteorological societies of Austria, Germany and Switzerland. It accepts high-quality peer-reviewed manuscripts on all aspects of observational, theoretical and computational research out of the entire field of meteorology, including climatology. Meteorologische Zeitschrift represents a natural forum for the meteorological community of Central Europe and worldwide.
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