Have you ever noticed a pleasant, clean smell after a rain storm? Especially if it’s a rain storm following a long period of dry weather? Some people notice it immediately, even detecting the scent before they have noticed water falling from the sky. Some people find it hard to detect, but it’s there. It leaves a pleasant, clean and earthly smell. Many say it smells good. However, did you know that the smell isn’t exactly caused by something clean. To be more precise, the smell after rain originates from bacteria, ozone and oil, amongst other things.
When it has rained it is often the case to notice a strong, but brief odour in the air. Some people can notice it better than others, but n matter where you are, the smell after it has rained can be sniffed out. So what exactly causes the distinct odour?
Scientist have a few theories as to what causes it. They believe that the clean part of the smell after rain is caused by ozone. Ozone is occasionally used to kill off odours, especially mouldy or musty ones.