On the Origin of the Dansgaard–Oeschger Events and Its Time Variability

The origin of the Dansgaard–Oeschger (D/O) events and its variability between different isotope stages is at present under debate. Evidence is herein presented that during the Holocene the “Bond cycle,” which is, a reduced version of the D/O one, is related to a signal on solar activity that it has been baptized as the “Long Trend.” A mechanism by which solar storms, which effect on the Earth’s atmosphere strongly depends on the geomagnetic field morphology, may explain this relationship is proposed, and how the differences between the D/O events along different isotope stages and between the two hemispheres may help in disentangle, at least partially, the ultimate origin of climate change is discussed.