http://thinkprogress.org/climate/2015/05/22/3662117/2015-hottest-year-record-so-far/
"Last week NASA reported that this has been the Earth’s hottest January-April on record. This week, the National Oceanic and Atmospheric Administration (NOAA) confirmed that finding with its latest monthly report on global temperatures.
Separately, NOAA released its monthly report on “Global Ocean Heat.” It makes clear that the ocean’s heat content down to 2000 meters (1.24 miles) has been soaring this century — and nearly gone off the charts this year"
