The fascinating science behind the aroma of the rain: Can you smell when the rain comes?

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Standen Sie schon einmal an einem brutzelnden Sommertag oder an einem frischen, eiskalten Winternachmittag an der Schwelle Ihres Hauses und glaubten, den kommenden Regen riechen zu können? Wie sich herausstellt, ist dieses Phänomen nicht allgemein verbreitet, was viele zu der Frage führt, ob es auf wissenschaftlichen Fakten beruht oder ob es lediglich ein skurriler Mythos ist. @media(min-width:0px){#div-gpt-ad-healthy_holistic_living_com-box-3-0-asloaded{max-width:468px!important;max-height:60px!important;}} Wenn Sie an einem besonders bewölkten Tag in den sozialen Medien gestöbert haben, ist Ihnen vielleicht eine polarisierende Debatte aufgefallen: Es gibt diejenigen, die selbstbewusst ihre einzigartige Fähigkeit verkünden, Regenfälle anhand von olfaktorischen Hinweisen vorherzusagen, während andere ausgesprochen zweifelhaft erscheinen. Unabhängig davon, in …
Have you ever stood on a sizzling summer day or on a fresh, ice -cold winter afternoon at the threshold of your house and believed to be able to smell the coming rain? As it turns out, this phenomenon is not common, which many leads to the question of whether it is based on scientific facts or whether it is only a bizarre myth. @Media (Min-Width: 0px) {#div-ad-healthy_holistic_living_com-Box-3-0-Asloaded {Max-Width: 468px! Important; max-Height: 60px! Important;}} If you have placed on a particularly cloudy day on a particularly cloudy debate, you may be a polarizing debate Noticed: There are those who confidently proclaim their unique ability to predict rain on the basis of olfactory indications, while others seem extremely doubtful. Regardless of this, in ... (Symbolbild/natur.wiki)

Have you ever stood on a sizzling summer day or on a fresh, ice -cold winter afternoon at the threshold of your house and believed that she could smell the coming rain? As it turns out, this phenomenon is not common, which many leads to the question of whether it is based on scientific facts or whether it is only a bizarre myth.

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If you have browsed on a particularly cloudy day on social media, you may have noticed a polarizing debate: there are those who confidently announce their unique ability to predict rain on the basis of olfactory indications, while others seem extremely doubtful. Regardless of the camp in which you are in, there are some fascinating evidence that support the concept of smells from rain. Numerous factors contribute to this olfactory phenomenon, especially the enchanting fragrance Petrichor.

The fascinating mysticism of Petrichor

Petrichor, a term from the Greek, whereby "petros" stone means and "Ichor" stands for the essential liquid that flows through the veins of ancient gods, stands for the intoxicating, earthy fragrance that penetrates the atmosphere after rainfall, especially after a longer dry period. The mineralogen Isabel Isabel Joy Bear and Richard Thomas first introduced this term into the world in 1964 and unintentionally aroused a widespread fascination for this mysterious smell.

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Although Petrichor is always one of the most popular natural scents for many people, the reason for his attraction was not understood until recently. In an revealing study from 2020, researchers discovered that the tempting fragrance of Petrichor was not only tempting for humans, but also proved to be irresistible for a variety of other animals.

The seductive reputation of geosmin

The fascinating answer lies in the presence of a widespread soil bacterium, streptomyces that produces a connection called geosmin. This special connection is responsible for the seductive smell, which we find in an inexplicable way. Surprisingly, the human nose has an increased sensitivity to geosmine and is able to recognize it in exceptionally small quantities, which even exceeds the extraordinary ability of sharks to smell blood in the water. Streptomyces bacteria create geosmine to attract living things, from small insects to larger animals, which then become unintentionally becoming wearers of the spores of the bacteria and thus help them to spread over larger regions.

When it rains, water droplets that hit the ground begin in the pores of the soil, as researchers explained in a study from 2015. These air pockets escape the water and transform into miniaturaerosols that bring traces of everything they were in contact with, including geosmine. The wind drives this aerosole away so that you can cover large distances, even in front of the rain clouds yourself. It is these aerosol particles that probably perceive people when they smell upcoming rain. This process is also responsible for the presence of bacteria high in the atmosphere, since these tiny microorganisms are carried away by the gusty winds.

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The sweet fragrance of ozone

Another decisive factor for the rain that is threatening is ozone. In contrast to the earthly fragrance of Petrichor, Ozon has a somewhat sweeter smell. Ozon consists of three oxygen atoms and derives its name from the Greek word "ozein", which means "smell". It is a naturally occurring gas, but can also be generated by artificial means such as fertilizers or other pollutants. An electrical load - be it due to a lightning strike or an artificial source - can create ozone by separating nitrogen in the atmosphere of oxygen molecules. After interaction with other chemicals in the atmosphere, some of these molecules can recombinate to nitrogen monoxide, which can finally become ozone.

A considerable absence of a threatening storm can be transported to the ground, where it is then perceptible to humans. This is because flashes within a storm split nitrogen and oxygen molecules in the atmosphere and recombinate to nitrogen oxide, which then reacts to ozone with other chemicals. The resulting odor smell is a strong indication of a forced thunderstorm. The following points illustrate this process:

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    1. storm formation: While a thunderstorm brings up, there are extensive atmospheric changes, including the generation of considerable electrical energy.
    2. ozone formation: This electrical energy facilitates the formation of ozone by splitting and recombination of nitrogen and oxygen molecules.
    3. Transport of ozone: The storm connected with the storm bring the ozone closer to the earth's surface.

    4. Ozone recognition: People can recognize this ozone near the ground and thus signal the approach of a violent rainstorm.

      5. The complicated relationship between rain, bacteria and ozone

      In a wonderfully complicated relationship, streptomyces, ozone and rain play together and create a sensory phenomenon that can act as a natural barometer. The presence of geosmin, which is produced by the floor bacteria streptomyces, combined with the unique fragrance of ozone, offers a remarkable way to predict rain before the first drop falls. This complex and elegant process is proof of the miracle of nature and its networking.

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      So if you go outside, breathe deeply and believe that it can smell rain on the horizon, you know that the probability is great that you are right. Recognize that Petrichor's inviting fragrance is due to the fact that the bacterium produces streptomyces geosmin to attract living things and increase its spores. Keep in mind that the Ozon smell is a treacherous sign of an upcoming downpour that is generated by the electrical energy of an impending storm. The connection between these elements is a fascinating proof of the subtleties of our environment and it is worth feeling appreciation every time you feel rain in the air.

      smelling rain - myth or reality?

      As this investigation shows, our ability to "smell" the rain is based on reality and not just an olfactory illusion. The earthy fragrance by Petrichor, which is produced by streptomyces, and the sweet smell of ozone together result in a adventure aroma that we can perceive. This complex interplay of biological and atmospheric factors not only enables us to predict arrival rain, but also contributes to the beauty and fascination of nature. The next time you perceive the characteristic smell of upcoming rain, think of the complicated processes behind it and maybe even carry an umbrella with you in any case.

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