by P. Homewood, October 12, 2018 in NotaLotofPeopleKnowThat
https://www.sciencedaily.com/releases/2012/04/120401135345.htm
The significance of course is that the warming of the oceans began long before any impact from CO2 emissions.
HH Lamb has written extensively about how sea temperatures in the Atlantic fell radically during the LIA. Is the warming trend since then merely a return to earlier conditions?