ice deposits, is not necessarily governed by temperature. The fact that climate and therefore ice deposits do not slavishly follow global temperature is so well known that it barely warrants examination. Spitzbergen, in the Arctic, is ice-free much of the year. New York regularly experiences sub-arctic conditions in winter, yet is on the same latitude as northern Portugal. Much of frozen Siberia is outside the Arctic Circle, and is not alpine. But, it is when we look at the scientific papers purporting to prove the link between carbon and heating that real conundrums appear. For example, according to the dating and the analyses, a fossil site only a few million years old on Ellesmere Is., Canadian Arctic, containing temperate animals and plants, has carbon dioxide not grossly different to ours. I have personally contacted the authors -- top people -- and, they can't guarantee their published carbon dioxide estimate of .0004 -- which isn't much above ours at .00038. What can be guaranteed is that beavers played not long past, close to the North Pole. That implies a massive temperature change. 9)Therefore, any prediction of future sea-level based on temperature is nothing better than a best guess. 10) There is no way of determining past Carbon dioxide levels with any degree of certainty back past approximately three-quarters million years (ice-cores) and the ice-cores are not foolproof. The most used existing method back past ice-cores is boron isotopy, boron acting as a proxy by theoretically being an indicator of ocean acidity