| Abstract: | The development of an analytical expression to describe the natural variation of global temperature and related climatic variables over periods from a few years or less to over a billion years is shown and seen to match the variation of eustatic sea-level over similar periods. An additional anthropogenic factor to take the greenhouse effect into account is added to this natural climatic variation giving close correlation between the combined natural-plus-anthropogenic model of global temperature variation and its observed history over the past century. This provides grounds for confidence in the subsequent deterministic forecast for the combined model and its sea-level counterpart of, for instance, about 0.7m rise by 2050AD.A tentative physical explanation of the natural climate model is given invoking the possibility that the Universal Gravitational Constant (G) may, in fact, be a variable. In parallel, the anthropogenic climate model is underlined by alluding to a theoretical explanation of the population growth mechanism which largely drives it. The interactive nature of the impact of man on sea-level rise and vice versa is stressed. |
