Long-term effects of solar activity and cosmic ray variations on the cyclone tracks in the North Atlantic
Abstract
Long-term changes of cyclone trajectories in the North Atlantic in the cold period (October- March) were analyzed, using the data of MSPL archive (Climate Research Unit, UK) for 1874- 1995. It was found that the oscillations of the latitude of cyclone tracks near the south-eastern coasts of Greenland reveal main periods about 80 and 22 years that indicate a possible relation to solar/geomagnetic activity and cosmic ray variations. It is shown that the intensity of cyclogenesis at middle latitudes in the North Atlantic is closely related to the latitudes of cyclone tracks in the region of predominating cyclogenesis near the Greenland coasts. The found secular oscillations of cyclone tracks are suggested to be a possible reason for the amplitude modulation of the 11-yr harmonic in the intensity of extratropical cyclogenesis in the North Atlantic. The results obtained provide evidence of the long-term changes in the thermo-baric field structure at the troposphere/stratosphere heights at middle and high latitudes associated with solar activity and cosmic ray variations.
- Publication:
-
37th COSPAR Scientific Assembly
- Pub Date:
- 2008
- Bibcode:
- 2008cosp...37.3324V