The title is a fair summary. The paper isn't simply confirming the "climate changed [warmed]" since 2015. The paper is showing the climate warmed the past decade twice as fast as it had between the decades from 1960-2000.
"This 58 indicates that the warming trend has been accelerating from a rate of 0.15 – 0.2 ◦C 59 per decade during 1980-2000, to more than twice that rate [0.4°C] most recently."
"This 58 indicates that the warming trend has been accelerating from a rate of 0.15 – 0.2 ◦C 59 per decade during 1980-2000, to more than twice that rate [0.4°C] most recently."