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The phenomenon of low fog in the Alt Urgell region is not simply another element of meteorology, but, in a context of persistent drought in Catalonia, it has become a great ally to help combat the lack of water in rain.
As can be seen in these photographs in La Vanguardia’s Readers’ Photos, drops of humidity, thanks to the low, humid fog, water the cereal fields in Pla d’Urgell.
Fog refers to the suspension of small water droplets that produce visibility of less than 1 km. It is a meteorological phenomenon that consists of very low clouds, near or at ground level and formed by small volume water particles in suspension.
As detailed by the World Meteorological Organization, the extent or depth of fog droplet deposits depends on the duration of the fog, the size distribution and numerical density of the fog (or cloud) droplets, as well as the the impact speed of the droplets.
They also depend on the properties of the object, often a leaf of a plant, on which the deposit is formed, as in this case in these snapshots captured in Alt Urgell.
When a large deposit occurs, the deposited droplets collect and drip onto the ground. In some circumstances, “the amount of water falling from trees in this way in a single night may be equivalent to the precipitation of a moderate rain shower.”
