Chapter 4 - Contemporary evidence for existing relation between geomagnetic and climatic parameters

Abstract

The present studies of temporal synchronization between geomagnetic and climatic time series are highly controversial. Some research reports a climate cooling in periods of geomagnetic strengthening. Other studies state the opposite: that geomagnetic field weakening and/or magnetic poles reversals are accompanied by climate cooling. Such a controversy is not supportive of the idea of any relation between geomagnetic field and climate variability. This chapter therefore shows contemporary evidence for existing coherence between geomagnetic field variations and some climate variables during the period 1900–2010. Statistical analyses reveal that the strength of geomagnetic–climate relation is unevenly distributed over the globe, with well-pronounced hemispherical asymmetry. Comparative analysis of geomagnetic and galactic cosmic rays (GCRs) intensity with climatic variables implies that the mediator of geomagnetic influence on climate is the intensity of GCRs and the depth of their penetration in Earth's atmosphere.