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Tellus,
submitted March 1, 1999

The Global Range of the Stratospheric Decadal Wave. Part II:
The QBO Effect on the Global Stratosphere in the Northern Winter

K. Labitzke + and H. van Loon*

+Meteorologisches Institut, Freie Universität Berlin,
12165 Berlin, Germany
*Present affilation: National Center for Atmospheric Research,
Boulder, Colorado, CO 80307, U.S.A.


Abstract

The paper contains correlations between the re-analyzed NCEP/NCAR stratospheric data below 10 hPa and the 11-year solar cycle. In the northern summer the correlations are strong and positive on the Northern Hemisphere and as far south as 30°S, whereas they are weak in the northern winter all over the globe.

If the northern winter, global data are stratfied according to the phase of the QBO in the lower stratosphere, the correlations in the Arctic are large and positive in the west years of the QBO but insignificantly small over the rest of the earth. In the east years the arctic correlations are negative, but to the south they are positive and strong in the tropical and temperate regions of both hemispheres. The influence of the solar cycle in the Arctic is strongest in the latter half of the winter.

The difference between the east and west years can qualitatively be ascribed to the fact that the dominant stratospheric teleconnection and the solar influence work in the same direction in the east years, but oppose each other in the west years.



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