The world's oceans were the hottest ever recorded in 2020

Heat absorbed by oceans compared with 1981–2010 average (zettajoules)

200

100

0

-100

-200

1940

1960

1980

2000

2020

200

100

0

-100

-200

1940

1950

1960

1970

1980

1990

2000

2010

2020