damn,this has taken the romance/charm out of 'i love the smell of rain'!
"The
chemical structure of geosmin, the compound behind the smell of the
Earth after rain, which itself is known as petrichor. Geosmin is a
compound released by certain soil bacteria called Actinomycetes, and
falling rains cause it to be released into the air. We are sensitive to
10 parts per trillion, or one drop in an Olympic-sized swimming pool.
here are more details on petrichor and what causes the earthy smell after rain.
more gyan: petrichor is absorbed best in clay soil. it is the built up chemical/oil released by plants into dry soil/in
drought conditions to inhibit seeds from germinating. these are absorbed
by certain soils and rocks. once it rains, the oil and the accompanying
scent is released into the air: time for growth phase of plant life cycles to begin!
and if you want this smell bottled note that: "Several perfumers try to recreate that complex smell of the forest
floor; upturned, a little decayed, yet at the same time fresh, cooling, a
sort of clean all the same. Great vetiver fragrances, such as Guerlain's classic Vetiver and Vetiver pour Elle, Route du Vetiver by Maitre Parfumeur et Gantier , Chanel's Sycomore, Lalique Encre Noire or F.Malle's Vetiver Extraordinaire mingle that particular freshness that the exotic grass root of vetiver possesses alongside a smokier, mustier background which brings on a crepuscular tinge. Some patchouli fragrances, notably Voleur de Roses by L'Artisan Parfumeur utilize the more wine-like facets of the rose and the Indian leaf material to render a scent that approximates well a garden after the rain. Herbal accents and iris notes alongside grassy-musty ingredients (such as vetiver, angelica, wormwood or oakmoss) also produce this effect as in Roadster by Cartier, L'Artisan Parfumeur Timbuktu, the stupendous Derby by Guerlain, Angeliques sous la Pluie (F.Malle) and Dior Homme.".
for more details on the above...
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