What does it really smell like on the street when it seems to us that it “smells like spring”?

What does it really smell like on the street when it seems to us that it “smells like spring”?

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answers (4)

Answer 1
August, 2021

Ledum, wind ............................................ .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. .................................................. ...

Answer 2
August, 2021

Technically, in general, everything that smells is volatile organic substances with a molecular structure. It is clear that almost everything smells around, even seemingly many obviously inorganic and mineral substances: a metal door handle, concrete, coarse salt, but in fact, their smell is always due to organic trace impurities, to which we are extremely sensitive. One of these substances, for example, is geosmin - we can catch its smell at a concentration of 0.000000000005% in air and 0.00000001% in an aqueous solution: impressive, you must agree. For this smell, a special word was even invented, which happens extremely rarely: petrikor ( petrichor , from the Greek πέτρα - stone and and ιχώρ - the power of the gods), this term was proposed in the middle of the last century to describe the characteristic the smell of wet soil that occurs after a rainstorm, which geosmin has. This substance is formed in the soil as a result of the vital activity of some soil microorganisms: gram-positive bacteria streptomycetes, actinomycetes, cyanobacteria. It is believed that we acquired such sensitivity to geosmin as a result of evolution: with the help of this smell, animals found a source of water or managed to hide from powerful rainstorms.

In addition to the soil-watery smell of geosmin, which can be clearly smelled on thaw days, the characteristic “spring” smell is made up of a number of substances, including some unsaturated aldehydes and their derivatives, which we perceive as a kind of markers of freshness (similar compounds cause the so-called “smell of blood” to which some predators are extremely sensitive). The aromas of awakening nature also make a significant contribution: various aromatic substances of plant origin, usually of the terpene series.

Answer 3
August, 2021

"It smelled like spring, the blizzards are out" (c) :))

For some reason, it seems to me that this is how we perceive the rising humidity in the first place.

Table of changes in the maximum moisture content in the air depending on temperature:
+20 C - 17.32 grams
+15 C - 12.84 grams
+10 C - 9.41 grams
+5 C - 6.80 gram
0 C - 4.85 gram
-5 C - 3.25 gram
-10 C - 2.36 gram
-15 C - 1.61 gram
-20 C - 1.08 gram

That is, if there is moisture in your places of residence at all, then in the spring it becomes more in the air, because the temperature rises.

And there are also different other opinions (a couple of dozen opinions):

What does spring smell like?

and

What does it smell like rain?

Answer 4
August, 2021

The smell of spring is, in fact, not one smell, but several. The components of the "bouquet" will differ depending on the area - herbs, flowers growing in it, and, of course, in a gas-polluted metropolis, spring will smell differently than in a village.

But there are general points. In late February and early March, a thaw begins, the snow melts, and the air is filled with the smell of melt water, to which is mixed the smell of wet earth, leaves rotted over the winter. A little later, the first buds begin to appear, the grass breaks through, and then the smell of greenery and wood is added to these smells.

All this is the very smell of spring :)

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