Jo Nova

"Frank Lansnerís first graph surprised me. Itís well known and often quoted that sea levels have been rising by 2-3 mm a year every year for the last 20 years. But itís not well known that the original raw satellite data doesnít show that at all.

What astonished me was the sea levels first recorded by the Topex Poseidon satellite array showed virtually no rise at all from 1993-2001. Surely not, I thought. I asked sea-level expert Nils Axel-Morner, and he confirmed: ďYes, it is as bad as that.ď Now, given that Envisat (the European satellite) showed no rise from 2003-2011 (until it was adjusted) that means we have almost 20 years of raw satellite data showing very little rise."