In the aftermath of recent April showers, we were reminded of the delightful scent that accompanies rainfall. This unique aroma, known as petrichor, is a chemical stew that is produced when rain interacts with certain compounds. The term petrichor was coined by Australian scientists in 1964 to describe this distinctive smell.
Petrichor is not a substance on its own but rather a combination of chemical compounds within the rain or released by the rain as it falls. Some of these compounds include ozone, which can be absorbed by raindrops as they fall and created by lightning during a rain event. Geosmin, a chemical produced in the soil by bacteria called Actinomycetes, also plays a role in creating this earthy scent. Plants also release compounds into the air when it rains, contributing to the overall fragrance.
The next time it rains, embrace the fresh and earthy smell of petrichor and remember that rain brings many benefits such as accelerating spring growth, reducing fire danger and bathing our environment in a delightful scent that reminds us of nature’s wonders.
