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Storm Scents: It's True, You Can Smell Oncoming Summer Rain: Scientific American - 0 views

  • When people say they can smell a storm coming, they're right
  • Weather patterns produce distinctive odors that sensitive noses sniff out.
  • Before the rain begins, one of the first odors you may notice
  • ...13 more annotations...
  • is a sweet, pungent zing in your nostrils
  • fresh aroma of ozone
  • Petrichor
  • occurs when airborne molecules from decomposing plant or animal matter become attached to mineral or clay surfaces
  • when the rains came, the redolent combination of fatty acids, alcohols and hydrocarbons is released
  • Petrichor potpourri
  • Falling water disturbs and displaces odoriferous molecules on surfaces, particularly on dry ones, and carry them into the
  • happen to be near vegetation, these molecules may come from plants and trees
  • rise up from concrete and asphalt
  • Damp earth
  • After a storm has moved through
  • aroma of geosmin, a metabolic by-product of bacteria or blue-green algae
  • Microbiologist Keith Chater at the John Innes Center in England has proposed that geosmin's fragrance may be a beacon, helping camels find their way to desert oases
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