Climate Scientist: September is Not a New Summer Month

It was expected that Sweden would break the heat record sometime during the year, but that it occurred now in September was just a coincidence. It's not a new summer month, says Sverker Hellström, climateologist at SMHI.

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Climate Scientist: September is Not a New Summer Month
Photo: Johan Nilsson/TT

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On Wednesday, the Swedish heat record for September was broken when both Lund and Helsingborg measured 31.1 degrees.

It has been record-warm globally since June last year and heat records have been broken in many places. We haven't seen much of it in Sweden, so it was only a matter of time before we would see these extremely high temperatures, says Hellström.

According to him, the increase in the number of heat records is due to global warming.

Since the late 1980s, we have been able to see that the average temperature has increased, which in turn increases the risk of heat records. The occurrence of a single day depends on several different things.

The average temperature is increasing during all seasons and it is generally getting warmer on most occasions. But there is great variation in how it manifests itself from year to year.

In other words, there is nothing to suggest that September will become a new summer month, even though last year followed the same trend in southern Sweden.

It is still random when these extremely warm periods occur. It entirely depends on how the air currents go, so you shouldn't draw too many conclusions. Now it happened in September in Sweden, but it could just as well have happened in the summer.

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By TTEnglish edition by Sweden Herald, adapted for local and international readers

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