Articles | Volume 33, issue 2
Ann. Geophys., 33, 207–215, 2015
Ann. Geophys., 33, 207–215, 2015

Regular paper 26 Feb 2015

Regular paper | 26 Feb 2015

The influence of solar activity on action centres of atmospheric circulation in North Atlantic

L. Sfîcă1, M. Voiculescu2, and R. Huth3,4 L. Sfîcă et al.
  • 1Faculty of Geography and Geology, Alexandru Ioan Cuza University, Iaşi, Romania
  • 2Faculty of Science and Environment, Dunărea de Jos University, Galaţi, Romania
  • 3Faculty of Science, Charles University, Prague, Czech Republic
  • 4Institute of Atmospheric Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic

Abstract. We analyse the response of sea level pressure and mid-tropospheric (500 hPa) geopotential heights to variations in solar activity. We concentrate on the Northern Hemisphere and North Atlantic in the period 1948–2012. Composite and correlation analyses point to a strengthening of the North Atlantic Oscillation and weakening (i.e. becoming more zonal) of the Pacific/North American pattern. The locations of points with lowest and highest sea level pressure in the North Atlantic change their positions between low and high solar activity.

Short summary
A possible link between solar activity and the atmospheric pressure fields is investigated using NCEP/NCAR data at ground level and at 500hPa, in the Northern Hemisphere for the cold season, with a focus on the North Atlantic centres of action. The Icelandic low seems to be most sensitive to the solar signal by moving towards north and by confining its activity area during months with high solar activity.