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Cause of the smell of rain established by scientists - VIDEO PDF Print E-mail
Tuesday, 20 January 2015 09:57

Have you ever noticed a pleasant smell rains after a long period of dry weather? Scientists have named it petrikorom and 1960s saw the result of this fragrance oils and release of chemical elements in contact with the ground a drop of rain.

Recently, scientists at the Massachusetts Institute of Technology (USA) for the first time used high-speed cameras to demonstrate how "the smell of rain" into the air.

During the study, researchers Cullen Byui Yunsu June and captured on video raindrops falling on different types of surfaces, including 16 soil samples. They also changed the intensity and speed of "rain" from small to tall, pouring water from different heights.



Scientists have discovered that when a raindrop hits the porous surface, inside her tiny bubbles are formed. These bubbles grow and float to the top, like bubbles in a glass of champagne. After reaching the surface of the drop, they burst and release the aerosol particles in the air. Byui and June suggest that these particles carry a unique "rain" flavor with viruses and bacteria from the soil.

Examined also noted that mild to moderate rains sheds at a low speed, produce more particulate matter than a downpour. This explains why petrikor often appears after a light rain.


НАЖМИТЕ ЗДЕСЬ ДЛЯ ПРОСМОТРА ВСЕГО СПИСКА НОВОСТЕЙ О НЕОБЫЧНЫХ ЯВЛЕНИЯХ>>>

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