A paper published Tuesday in the journal Nature has concluded that those northern waters could be open for months at a time as early as 2030, even if humanity manages to drastically scale back its greenhouse gas emissions
“It brings it about a decade sooner,” said Nathan Gillett, an Environment and Climate Change Canada scientist and one of the co-authors of the study.
To do so, the scientists first teased out the effect of greenhouse gases from other factors that affect sea ice loss, such as artificial chemicals from aerosols or natural events such as volcanic eruptions. The impact of aerosols was found to be negligible and the study concluded that natural events contributed no more than 10 per cent of sea ice loss.
But once the model had been brought in line with what was happening on the water, predictions of summer ice disappearance got a lot closer. By comparing ice extent year-over-year – February 2019 against February 2018, for example – the data showed ice loss from climate change in every month of the year.
France Dernières Nouvelles, France Actualités
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