Stefan Rahmstorf at Potsdam University (March 2007) discusses the IPCC sea level numbers:
You can read the whole analysis here:The IPCC sea level numbers
Excerpt below:
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What is included in these sea level numbers?
Let us have a look at how these numbers were derived. They are made up of four components: thermal expansion, glaciers and ice caps (those exclude the Greenland and Antarctic ice sheets), ice sheet surface mass balance, and ice sheet dynamical imbalance.