Worldwide temperatures briefly exceeded a key warming threshold earlier this month, a hint of heat and its harms to come, scientists worry. 9News
The mercury has since dipped again, but experts say the short surge marked a new global heat record for June and indicates more extremes ahead as the planet enters an El Niño phase that could last years.
"Just because we've temporarily gone over 1.5 degrees doesn't mean we've breached the Paris Agreement limit," cautioned Samantha Burgess, deputy director of the Copernicus program. Still, the 11 days spent at the 1.5-degree threshold shows how important it is for scientists to keep a close watch on the planet's health, not least because previous spikes above 1.5 have all happened during winter or spring in the northern hemisphere, she said.
That's because a three-year La Niña phase — which tends to dampen the effects of global warming — has given way to the opposite, an El Niño period, which could add another half-degree or more to average temperatures.
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