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GEOPHYSICAL RESEARCH LETTERS, VOL. 29, NO. 15, 1718, doi:10.1029/2002GL014903, 2002

Solar Wind Variations Related to Fluctuations of the North Atlantic Oscillation

Fredrik Boberg

Lund Observatory, Lund, Sweden


Henrik Lundstedt

Solar-Terrestrial Physics Division, Swedish Institute of Space Physics, Lund, Sweden


Abstract

A study on a possible solar wind interaction with the North Atlantic Oscillation (NAO) is performed. Results are presented suggesting a relationship between the NAO index and the electric field strength E of the solar wind. A possible scenario for the suggested interaction is that an electromagnetic disturbance is generated by the solar wind in the global electric circuit of the ionosphere. This disturbance is then dynamically propagating downward through the atmosphere and subsequently influencing the large-scale pressure system in the North Atlantic region. A relationship is also evident on longer time-scales when using the group sunspot number as a proxy for the solar wind.

Published 3 August 2002.

Index Terms: 2164 Interplanetary Physics: Solar wind plasma; 2784 Magnetospheric Physics: Solar wind/magnetosphere interactions; 2409 Ionosphere: Current systems (2708); 1610 Global Change: Atmosphere (0315, 0325).

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Citation: Boberg, F., and H. Lundstedt (2002), Solar Wind Variations Related to Fluctuations of the North Atlantic Oscillation, Geophys. Res. Lett., 29(15), 1718, doi:10.1029/2002GL014903.