An intensely warm winter and spring are melting climate records across Alaska, reports NOAA in the post 'Arctic set for record-breaking melt'. The January-April 2016 period was 11.4°F (6.4°C) warmer than the 20th century average, reports NOAA. The NOAA image below further illustrates the situation.
Ocean heat is also very high and rising. Oceans on the Northern Hemisphere were 0.93°C (or 1.7°F) warmer in the most recent 12-months period (May 2015 through April 2016) than the 20th century average.
Here's an animation comparing sea surface temperatures of the North Atlantic between May 25, 2015, and May 25, 2016.
Arctic sea ice extent was 10.7 million km2 on May 25, 2016, 1.1 million km2 less than it was on May 25, 2012, as the update below shows.