Winters are getting shorter and summers are getting hotter: how global warming is changing seasonality

An analysis of climate change trends shows that global warming leads to longer summers and shorter winters, according to Brian Brettschneider, a researcher at the University of Alaska and climatologist.

Photo: Shutterstock

The scientist shares the results of his own research, which demonstrate that the number of days with high temperatures has increased over the past 30 years, and the opposite with low temperatures.

Brettschneider came to this conclusion, analyzing data from thirty-year cycles: 1960-1989 and 1990-2019.

So, in the USA and Canada, summer now lasts an average of a week longer.

The pattern is this: the closer you are to the ocean, the longer the high temperatures last. This is quite logical, given that the oceans have become significantly warmer recently and have a significant impact on the climate, the researcher notes.

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The so-called “island effect of urban heat” is also observed - the air temperature in cities and suburbs is higher than in intercity space.

This is due to the road surface - asphalt and concrete retain high temperatures.

What about the winter?

In winter, these changes are even more noticeable, Brettschneider writes.

Cold days in the USA and Canada, for example, last 30 days on average 15 days less than in the previous thirty years.

Such changes lead to very real practical consequences.

In particular, they pose a threat to species vulnerable to heat.

On the subject: Extreme heat: in 50 years, billions of people will be in unsuitable climate

The new climate could cause drought in certain regions and lead to increased costs for the cooling system in cities.

But on the other hand, lengthening the summer season creates additional opportunities for those who work in the field of tourism and recreation.

At the same time, business associated with winter sports is suffering, and an additional threat of forest fires is being created.

The positive is a reduction in heating costs on days with extremely low temperatures.

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