00:02Researchers from the University of British Columbia examined 10 cities across the globe
00:06in what's known as mid-latitude regions. These are cities that sit between the polar
00:11cool regions and the tropics. So some of the cities they looked at were Sydney, Paris,
00:16Tokyo and Toronto. And it found that when you look at the summers in all of these cities,
00:21based on temperature rather than date, the summer-like warmth and the number of days
00:26they experienced summer-like warmth, they all increased over the last three decades since 1990.
00:32In particular Sydney has experienced the biggest length increase in summer. When you look at it
00:39year-on-year they found that we've had another one and a half days of summer every year since 1990.
00:47So when you boil that down over 20 years that's an extra month of summer. Now the lead author Ted
00:53Scott says summers have also become more abrupt in their transitions and are accumulating more heat.
01:00So it seems as though there's less relief and the data is also showing that that we're having
01:05on average fewer days that kind of dip below what we would consider the threshold of summer temperatures.
01:13And and so it when it gets warm it stays warm. So while Sydney has far led the other cities
01:20as far
01:20as the growth in summer days you compare it to places like Toronto and Tokyo more than double the number
01:27of summer days it's experienced. But you look at the city of Minneapolis in the US Midwest it's had a
01:33similar sort of increase a little bit lower but still quite high about nine extra days of summer
01:39per decade since the 1990s. So still quite a high rate but Sydney is certainly still the leader.
01:45Now the state government was asked about this today. It is said that this highlights the reality
01:51of climate change and the need to both mitigate it and adapt to it.
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