Jim2, for me what’s just as impressive as the science, is that Walter Munk was born in 1917, and is giving that lecture in 2009! So whatever brand of vitamins Walter’s been taking, we should *ALL* of us be taking them. 
Having reached age 90++, Walter Munk is totally immune to considerations of political pressure and personal gain … so what we’re seeing in that video are the unvarnished, unfiltered scientific opinions of the world’s most experienced oceanographer. 