It’s news because it’s a more nuanced claim than your “general ocean warming has occurred over thousands of years” claim. The claim is that the marked increase

It’s news because it’s a more nuanced claim than your “general ocean warming has occurred over thousands of years” claim. The claim is that the marked increase in warming in the 20th century began decades earlier than was previously believed, not just that there was once an ice age and it’s warmer now.