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article imageThis is why cold air smells different

By Owen Weldon     Jan 15, 2014 in Environment
Some smells associated with winter include pine needles, wood smoke and snow. The cold of winter smells different from the heat of summer, and there is a reason for that.
Pamela Dalton, an olfactory scientist at the Monell Chemical Senses Center in Philadelphia, said that one reason is that odor molecules do not move that fast when the temperature drops. Essentially this means that there are not many smells to smell on a cold, crisp day than there are on a humid one, according to Discovery.
It is the reason why hot soup smells more than soup that is cold, or why garbage trucks smell more on humid days in the summer.
According to Yahoo, Dalton said that when the ambient air is cold, people's noses do not work as well.
According to Aninews, Alan Hirsch, who is a neurologist and psychiatrist in Chicago, said that cold air stimulates the trigeminal nerve, which is irritant-sensitive. The nerve is responsible for making you cry when you chop up an onion.
Hirsch said that when odors stimulate the olfactory nerve, as well as the trigeminal, then the experience is more intense.
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