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Current sea level rise is after all not exaggerated, in fact the opposite case is more plausible.

Observational data and changing conditions in such places as Greenland suggest if there's a real problem here it's underestimation of future sea level rise.

As can be seen in an inset of the graph above, tide gauge and satellite altimeter measurements track each other with remarkable similarity.

These two independent systems mutually support the observed trend in sea level.

Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. Gavin Schmidt investigated the claim that tide gauges on islands in the Pacific Ocean show no sea level rise and found that the data show a rising sea level trend at every single station. Sea level rises as ice on land melts and as warming ocean waters expand.IPCC synthesis reports offer conservative projections of sea level increase based on assumptions about future behavior of ice sheets and glaciers, leading to estimates of sea level roughly following a linear upward trend mimicking that of recent decades.In point of fact, observed sea level rise is already above IPCC projections and strongly hints at acceleration while at the same time it appears the mass balance of continental ice envisioned by the IPCC is overly optimistic (Rahmstorf 2010 ).In helped him navigate through a wide range of scientific research, but without benefit of specialized training in astronomy, geology, history, archaeology, or comparative religion and mythology.Hancock is obviously bright, articulate, and a good writer and storyteller who comes across as eminently reasonable, which makes it all the more difficult to tease apart fact from fiction in the many claims made in his books, documentary films, and lectures.

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