, it was the coolest April since 2013. By NOAA's reckoning, eight other Aprils have been warmer in records dating back to 1880. Looking ahead, 2021 is likely to turn out much cooler globally than last year, which was the second warmest year on record.
The relative chill of global average temperature that we’re seeing now is thanks in large measure to the lingering cooling influence of theHow La Niña Casts a Chill But La Niña's cooling influence doesn't mean that extra heat energy trapped in the climate system by greenhouse gases has somehow escaped into space, never to be seen again. Instead, during a La Niña some heat energy from the atmosphere. When La Niña's opposite, El Niño, kicks in, some of that heat will come to the surface and wind up back in the atmosphere, helping to warm the global average temperature.
. But that doesn't mean it's cooling impact has vanished. Surface waters of the equatorial Pacific are still quite cool. And according to Hansen and Sato, the overall influence of La Niña should linger for about five months.
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