TEHRAN (Press Shia) – The hottest year on record globally in 2015 could be just another average year by 2025 if carbon emissions continue to rise at their current rate, according to new research published in the Bulletin of American Meteorological Society.
And no matter what action we take, human activities had already locked in a "new normal" for global average temperatures that would occur no later than 2040, according to lead author Dr. Sophie Lewis, from the Australian National University (ANU) hub of the ARC Centre of Excellence for Climate System Science (ARCCSS).
However, while annual global average temperatures were locked in, it was still possible with immediate and strong action on carbon emissions to prevent record breaking seasons from becoming average — at least at regional levels.
"If we continue with business-as-usual emissions, extreme seasons will inevitably become the norm within decades and Australia will be the canary in the coal mine that will experience this change first," Lewis said.
The results revealed that while global average temperatures would inevitably enter a new normal under all emissions scenarios, this wasn't the case at seasonal and regional levels.
"It gives us hope to know that if we act quickly to reduce greenhouse gases, seasonal extremes might never enter a new normal state in the 21st Century at regional levels for the Southern Hemisphere summer and Northern Hemisphere winter," Lewis added.