During the past decades, linkages between the atmosphere, biosphere, anthrosphere, hydrosphere, cryosphere, lithosphere and cosmogenic input have been revealed. These linkages are characterized by complex integration and feedback. While the existence of this complex global system is now recognized, how it functions is poorly understood. The recent increase in CO2 and other greenhouse gases as a result of human activity and, in turn, concern over the climate change which may result, require that we gain a detailed knowledge of the total global system. Signals generated by interactions within the global system can be seen in the atmosphere, “captured” within glaciers and available for our viewing in ice cores.