Humidity.
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Hmmm.. the most pleasant of "after the rain smells" is apparently caused by bacteria. Go figures..
2006-07-20 04:29:28
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answer #1
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answered by k² 6
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i know this aint it but its- earthy aroma to me.....
Most people notice a distinctive smell in the air after it rains. It's frequently linked with spring, as the smell of fresh cut grass is associated with summer. You'll find it in a lot of poetry and also on many inspirational lists of things to be happy about. But what causes it?
As it turns out, the smells , is actually caused by bacteria! Actinomycetes, a type of filamentous bacteria, grow in soil when conditions are damp and warm. When the soil dries out, the bacteria produces spores in the soil. The wetness and force of rainfall kick these tiny spores up into the air where the moisture after a rain acts as an aerosol (just like an aerosol air freshener). The moist air easily carries the spores to us so we breathe them in. These spores have a distinctive, earthy smell we often associate with rainfall. The bacteria is extremely common and can be found in areas all over the world, which accounts for the universality of this sweet "after-the-rain" smell. Since the bacteria thrives in moist soil but releases the spores once the soil dries out, the smell is most acute after a rain that follows a dry spell, although you'll notice it to some degree after most rainstorms.
Another sort of smell is caused by the acidity of rain. Because of chemicals in the atmosphere, rainwater tends to be somewhat acidic, especially in urban environments. When it comes in contact with organic debris or chemicals on the ground, it can cause some particularly aromatic reactions. It breaks apart soil and releases minerals trapped inside, and it reacts with chemicals, such as gasoline, giving them a stronger smell. These reactions generally produce more unpleasant smells than bacteria spores, which is why the after-the-rain smell isn't always a good one. Like the smell caused by the bacteria spores, the smell of chemical reactions is most noticeable when it rains following a dry spell. This is because once the chemicals on the ground have been diluted by one downpour, they don't have the same reaction with the rainwater.
Another after-the-rain smell comes from volatile oils that plants and trees release. The oil then collects on surfaces such as rocks. The rain reacts with the oil on the rocks and carries it as a gas through the air. This scent is like the bacteria spores in that most people consider it a pleasant, fresh smell. It has even been bottled and sold for its aromatic qualities!
These are a few common rain smells, but there are also all sorts of other scents after it rains. There is lots of aromatic material that the moisture and impact of rain can stir up, and the moist atmosphere following a downpour is particularly good at carrying these particles through the air. So, when you talk about the after-the-rain smell with a friend, you may mean one thing while your friend is thinking of something else. You'll both agree, however, that the air has a much stronger aroma to it after a good rain.
so i bet u lookin for the sweet bacteria smell eh?
2006-07-21 03:19:34
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answer #2
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answered by El-rene 4
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That smell? Yep. I think it's worms. You know how it kind of smells like a lake right after it rains? I always thought it was the rain (because the rain comes from the lake). That's not the case, because the rain water is practically pure. It's the worms! The worms emerge from the moist ground to get air. And worms are all over the place after a rainstorm.
2006-07-20 11:33:32
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answer #3
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answered by M 4
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Wet??!
My wife thinks that parsley tastes like the smell of wet dog.
So she seems to have a way with these kind of things.
I will ask her what she thinks when she gets back from work and post another answer.
It won't be scientific, but knowing her it will be fun!
2006-07-20 13:52:37
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answer #4
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answered by skruffoi-rat-tramp-boy 1
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I think is smells clean. As for a technical term..that I don't know. I'm sorry.
2006-07-20 11:30:24
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answer #5
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answered by Jenn 3
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The smell you are referring to is actually ozone, which is created by the electrical activity present in rainclouds.
2006-07-20 11:56:31
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answer #6
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answered by Harry 5
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It's caused by Ozone and the smell is described as ozonic
2006-07-20 12:49:40
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answer #7
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answered by blonde_4_a_reason 1
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Awesome question
"Wet nosey rainy wet smell": I reckon
but I want to know the answer too now...
2006-07-20 11:30:57
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answer #8
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answered by Ichi 7
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Dampgrannypantsmell.
2006-07-20 11:37:24
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answer #9
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answered by rbatty02 1
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in america no thire is not. my question - is thire a term in another language?
2006-07-20 12:02:19
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answer #10
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answered by weatherman 2
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