"Since the turn of the century, however, the change in Earth’s global mean surface temperature has been close to zero."
"Since 2000, temperatures have been warmer than average, but they did not increase significantly." Data courtesy of NOAA’s National Climatic Data Center.
A hypothesis that the heat was sequestered in the ocean abyss was proven incorrect by NASA in October of 2014 - "the cold waters of Earth's deep ocean have not warmed measurably since 2005", according to a new NASA study, leaving unsolved the mystery of why global warming appears to have stopped in 1998. It started in 1978. But there really has been no warming this century.