* The author is part of the community of readers of La Vanguardia
The cows wake up in the morning and find the meadow white, icy, at -2º temperature, with fog. And, in the distance, the snow in the Pyrenees. They are images captured for La Vanguardia’s Readers’ Photos in the fields of Manlleu, in the Osona region.
Frost is a meteorological phenomenon that consists of a drop in ambient temperature to levels below the freezing point of water and causes the water or vapor in the air to freeze, depositing it in the form of ice on surfaces, such as can be seen in Manlleu.
The extreme case of frost is the black frost, which is when a frost occurs with greater pressure and even causes the plants to be completely destroyed.
It is not unusual for frosts to occur in autumn in Osona. In fact we are already in meteorological winter. The interior of this region has a continental Mediterranean climate (extreme temperatures and relatively humid, with more abundant rains in spring and autumn) while in the mountains that surround it, especially in the east and south, it is more Atlantic (wetter and less extreme), which is evident in its vegetation.
The average altitude of the region exceeds 500 meters and is made up of a central plain, the Plana de Vic, surrounded by higher altitudes, and a mountainous sub-region, the Lluçanès.
The absence of wind means that in the winter months the phenomenon of thermal inversion is common, which makes it colder and fog forms in low areas.
