You might have mixed feelings about rain. For those experiencing long periods of drought, rain can bring joy. But for those wanting to enjoy the outdoors, a large downpour can ruin the experience. Getting drenched by the weather can make you feel cold and weaken your immune system, but there are some surprising benefits to going out in the rain, provided you've got your brolly and raincoat!
您可能对下雨有复杂的感觉。 对于长期干旱的人们来说,雨水可以带来欢乐。 但对于那些想要享受户外活动的人来说,一场大雨可能会破坏这种体验。 被天气淋湿会让您感到寒冷并削弱您的免疫系统,但如果您带上雨伞和雨衣,在雨中外出还有一些令人惊讶的好处!
Have you ever noticed a difference in the smell in the air after it's rained? That smell has a name – petrichor. This earthy scent, a pleasant one to many, happens when raindrops release particles from the ground. Humans are incredibly sensitive to the smell, which some scientists think is because it tells us there is new, fresh water. It probably made our ancestors feel safe and calm. And then there's the relaxing sound of raindrops splattering on a hard surface. A 2018 study published in PubMed Central by Thoma and colleagues found that the sound of rain can reduce the stress hormone cortisol and bring a sense of calm.
你有没有注意到下雨后空气中的气味发生了变化? 这种气味有一个名字——petrichor。 当雨滴从地面释放颗粒时,就会产生这种令人愉悦的泥土气味。 人类对气味非常敏感,一些科学家认为这是因为它告诉我们有新的淡水。 这可能让我们的祖先感到安全和平静。 然后是雨滴落在坚硬表面上的令人放松的声音。 Thoma 及其同事于 2018 年在 PubMed Central 发表的一项研究发现,雨声可以降低压力荷尔蒙皮质醇,带来平静感。
When raindrops hit a hard surface, something called 'negative ions' are released into the air, which, when in high levels, are known to boost serotonin in the brain, again making us feel more relaxed. However, there isn't a scientific consensus about exactly how this is happening. These negative ions also make the air cleaner. Pam Dalton, a cognitive scientist at the Monell Chemical Senses Center in Pennsylvania, says there is reasonably good evidence that "the negative ions can clear dust, bacteria, allergens, and other particles from air, which for many can have a positive effect on respiratory health." The heavier the rain, the greater effect it has on cleaning the air.
当雨滴撞击坚硬的表面时,一种叫做“负离子”的物质会释放到空气中,当负离子含量较高时,会增加大脑中的血清素水平,再次让我们感到更加放松。 然而,对于这种情况到底是如何发生的,科学界尚未达成共识。 这些负离子还使空气更清洁。 宾夕法尼亚州莫内尔化学感官中心的认知科学家帕姆·道尔顿表示,有相当充分的证据表明“负离子可以清除空气中的灰尘、细菌、过敏原和其他颗粒,这对许多人来说可以对呼吸系统健康产生积极影响。” 雨越大,净化空气的效果就越大。
You could feel some of these benefits from the comfort of your own home, just by opening the window and taking a whiff of the petrichor scent or listening to the pitter-patter sound on your roof. Or, after making sure you're dressed in the right attire, step outside in the rain to fully experience the mood-boosting effects of those mysterious negative ions in the air. Just remember to come straight back inside if you see lightning, as this could be dangerous.
您可以在舒适的家中感受到其中的一些好处,只需打开窗户,闻一闻彼得里克的气味,或聆听屋顶上的啪嗒啪嗒的声音。 或者,在确保穿着合适后,在雨中走出去,充分体验空气中神秘负离子的提振情绪效果。 请记住,如果看到闪电,请立即返回室内,因为这可能很危险。