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World is halfway through its hottest decade

World is halfway through its hottest decade

Chile’s wall-to-wall solar panels will help as 1.5°C approaches. Image: By Antonio Garcia on Unsplash

Things are warming up: already the world is halfway through its hottest decade on record, if predictions prove correct.

LONDON, 13 February, 2019 – Here is a climate forecast that climate scientists, meteorologists, politicians, voters and even climate sceptics can check: the next five years will be warm, and will probably help to complete the hottest decade ever.

They will on a global average be at least 1°C higher than the average temperature of the planet 200 years ago, before the accelerating combustion of fossil fuels.

That is because the planet is already midway through what may well prove to be its warmest 10 years since records began on a planetary scale in 1850. There is even a possibility that within the next five years, the global temperature rise could tip 1.5°C above the long-term average for human history.

This is the ambitious limit to global warming that the world set itself at an historic meeting in Paris in 2015, for the year 2100.

And the forecasters can make such predictions with some confidence because tomorrow’s temperature chart is already inscribed in the air we breathe: the pattern of warming over the last century is consistent with the steady rise in greenhouse gas levels in the atmosphere, and these are still increasing because fossil fuel use is still going up.

“Predictions now suggest around a 10% chance of at least one year between 2019 and 2023 temporarily exceeding 1.5°C”

Adam Scaife, who heads long-range prediction research at the UK Met Office, said: “2015 was the first year that global annual average surface temperatures reached 1.0°C above pre-industrial levels and the following three years have all remained close to this level.

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