cover of episode Lab Notes: Why the Australian sun has a real sting to it

Lab Notes: Why the Australian sun has a real sting to it

2025/2/4
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Belinda Smith
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David Whiteman
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Overseas Visitor
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@Overseas Visitor :我发现在纽约涂抹防晒霜可以持续一个半小时而不被晒伤,但在这里仅仅20分钟就会被晒伤,这让我非常困惑,想知道原因。 @Belinda Smith :虽然澳大利亚的太阳感觉比美国更强烈,但实际上并非臭氧层空洞导致。人们普遍认为澳大利亚紫外线强是因为臭氧层空洞,但事实并非如此。我们需要探究澳大利亚夏季阳光如此强烈的原因。 @David Whiteman :作为专家,我认为澳大利亚夏季阳光强烈,特别是对于那些来自北欧血统的人来说,这种阳光与他们较浅的肤色并不匹配。罪魁祸首是紫外线,它是一种高能量辐射,对我们的DNA造成损害。地球轨道、大气条件和生活方式等多种因素共同导致了澳大利亚紫外线强度高。同时,我认为我们应该采取积极的防晒措施,以减少患皮肤癌的风险。

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Australia's summer UV levels are high enough to cause sunburn in as little as 11 minutes.

Yet the summer sun in the Northern Hemisphere rarely feels that full on.

So why does our sunlight have that extra "bite"?

Spoiler: it's not the hole in the ozone layer.

Learn more on Lab Notes, the show that brings you the science of new discoveries and current events.

Get in touch with us: labnotes@abc.net.au