Influence of Solar Magnetic Sector Structure on Terrestrial Atmospheric Vorticity

John M. Wilcox Institute for Plasma Research, Stanford University, Stanford, Calif. 94305

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Philip H. Scherrer Institute for Plasma Research, Stanford University, Stanford, Calif. 94305

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Leif Svalgaard Institute for Plasma Research, Stanford University, Stanford, Calif. 94305

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Walter Orr Roberts University Corporation for Atmospheric Research, Boulder, Colo. 80302

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Roger H. Olson Environmental Data Services, NOAA, Boulder, Colo. 80302

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Roy L. Jenne National Center for Atmospheric Research, Boulder, Colo. 80302

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Abstract

The solar magnetic sector structure has a sizable and reproducible influence on tropospheric and lower stratospheric vorticity. The average vorticity during winter in the Northern Hemisphere north of 2ON latitude reaches a minimum approximately one day after the passing of a sector boundary, and then increases during the following two or three days. The effect is found at all heights within the troposphere, but is not prominent in the stratosphere, except at the lower levels. No single longitudinal interval appears to dominate the effect.

Abstract

The solar magnetic sector structure has a sizable and reproducible influence on tropospheric and lower stratospheric vorticity. The average vorticity during winter in the Northern Hemisphere north of 2ON latitude reaches a minimum approximately one day after the passing of a sector boundary, and then increases during the following two or three days. The effect is found at all heights within the troposphere, but is not prominent in the stratosphere, except at the lower levels. No single longitudinal interval appears to dominate the effect.

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