We have shown in earlier studies the size of the changes in the lower stratosphere which can be attributed to the 11-year sunspot cycle (SSC). We showed further that in order to detect the solar signal it is necessary to group the data according to the phase of the Quasi-Biennial Oscillation (QBO). Although this is valid throughout the year it was always obvious that the effect of the SSC and the QBO on the stratosphere was largest during the northern winters (January/February). Here we extend our first study (Labitzke 1987) by using additional data. Instead of 30 years of data, we now have 65 years. Results for the entire data set fully confirm the early findings and suggest a significant effect of the SSC on the strenght of the stratospheric polar vortex and the mean meridional circulation. Zusammenfassung In früheren Arbeiten haben wir gezeigt, wie groß der Einfluss des 11jährigen Sonnenfleckenzyklus auf die untere Stratosphäre ist. Um diesen Einfluss zu isolieren, müssen die Daten nach der Phase der Quasi-Biennial Oscillation (QBO) sortiert werden. Dies ist während des ganzen Jahres notwendig, aber der Einfluss von QBO und 11-jährigem Sonnenfleckenzyklus ist am stärksten während des Nordwinters (Januar-Februar). Für unsere erste Veröffentlichung (Labitzke 1987) standen nur Daten
No takes yet. Share an insight, caveat, or question.
Labitzke et al. (2006) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: