Sea level is scarcely rising: The average rise in sea level over the past 10,000 years was 4 feet/century. During the 20th century it was 8 inches. In the past four years, sea level has scarcely risen at all. As recently as 2001, the IPCC had predicted that sea level might rise as much as 3 ft in the 21st century. However, this maximum was cut by more than one-third to less than 2 feet in the IPCC’s 2007 report. Moerner (2004) says sea level will rise about 8 inches in the 21st century. Mr. Justice Burton, in the UK High Court, bluntly commented on Al Gore’s predicted 20ft sea-level rise as follows: “The Armageddon scenario that he depicts is not based on any scientific view.” A fortiori, James Hansen’s prediction of a 246ft sea-level rise is mere rodomontade. Sea-level rise since the beginning of 2006 has been negligible. Source: University of Colorado, 2009, release 4.
Firstly, the characterization of past sea level rise is simply and wildly false.
(courtesy of Global Warming Art)
Secondly, the IPCC AR4(2007) sea level assessment explicitly disincluded any possible rise from ice sheet melt because of increased uncertainty from the time the IPCC TAR(2001) report came out. This uncertainty arose from the fact that Greenland and West antarctica are responding much faster and in ways we do not understand to climate change. The AR4 figures are only about thermal expansion and glacial melt water. Real Climate talked about this here.
Thirdly, who care what Justice Burton says, or even Al Gore? On the other hand, James Hansen knows what he is talking about even if crakar does not. The only place a figure of 246 ft sea level rise can come from is a calculation of how high waters would rise if all ice on the planet melted, (or at least GISS and WAIS, I’m offline now so maybe someone in the comments can post the right citations). No one at all knowledgable in climate science thinks that that can happen in anything less than centuries (including Al Gore who never said anything different). Hansen has never claimed otherwise. Post a quote and a link or drop that turd right now!
Fourthly, we are concerned with climate, with 30+ year trends. Fluctuations over a few years or even a decade are noise not signal.