This morning smelled like the tropics

The tropics often has a particular smell in the morning, sort of an earthy smell, like what comes from fresh rain on dry rocks or soil. The word for this smell is "petrichor".  And it's very pronounced in the wet tropics after a rainy night followed by a sunny morning.  This morning here in the upper Midwest  it was a very pronounced smell because last night it rained after several days of dry conditions, and for Feb. 21 it was a positively tropical 60 degrees when TPP stepped out to get his newspaper. This sort of mixes with the smell of composting leaves.  So every now and then conditions produce this smell that says "this smells like the tropics".