Towards the Gulf of Trieste, Radiation Fog Found the Right Conditions in the Divača-Gabrk Karst Basin (440m a.s.l.); from Western Vremščica Ridge, Primorski Kras/Coastal Karst, Slovenija
06-06-2023
Here I turned 180° in the opposite direction to that of the thunderhead in the previous photo, i.e. from the Internal Karst (East) towards the Coastal one and Trieste gulf (West, see the notes), which City is partly covered by the Trieste Karst plateau itself from this POV.
You will all have noticed that in summer, after a sudden and short rain water vapor rises from the ground, which was overheated by the previous insolation, and condenses into "smoke".
The phenomenon is mostly visible on the asphalt, without wind and generally lasts a tens of minutes.
If sunset is near and the sun no longer dries or heats the ground, therefore remaining cooled and made humid by the rain, thanks to the physiological drop in temperature in the evening, the air saturated with water vapor condenses into low mists (and rapidly into dense fog) in the more humid, low-lying and flat or concave areas.
Areas with these characteristics, such as the widespread Karst-Dinaric region basins, have a more marked drop in temperature especially near the ground, in open areas, mainly grasslands and moors.
The fog that form is therefore close to the ground (generally from it for a few tens of centimeters and up to 4-5m in height) and stratified; if the sky remains clear and without wind, thermal inversion fogs last all night and dissolve only with the direct sunrays of the following morning.
Towards the Gulf of Trieste, Radiation Fog Found the Right Conditions in the Divača-Gabrk Karst Basin (440m a.s.l.); from Western Vremščica Ridge, Primorski Kras/Coastal Karst, Slovenija
06-06-2023
Here I turned 180° in the opposite direction to that of the thunderhead in the previous photo, i.e. from the Internal Karst (East) towards the Coastal one and Trieste gulf (West, see the notes), which City is partly covered by the Trieste Karst plateau itself from this POV.
You will all have noticed that in summer, after a sudden and short rain water vapor rises from the ground, which was overheated by the previous insolation, and condenses into "smoke".
The phenomenon is mostly visible on the asphalt, without wind and generally lasts a tens of minutes.
If sunset is near and the sun no longer dries or heats the ground, therefore remaining cooled and made humid by the rain, thanks to the physiological drop in temperature in the evening, the air saturated with water vapor condenses into low mists (and rapidly into dense fog) in the more humid, low-lying and flat or concave areas.
Areas with these characteristics, such as the widespread Karst-Dinaric region basins, have a more marked drop in temperature especially near the ground, in open areas, mainly grasslands and moors.
The fog that form is therefore close to the ground (generally from it for a few tens of centimeters and up to 4-5m in height) and stratified; if the sky remains clear and without wind, thermal inversion fogs last all night and dissolve only with the direct sunrays of the following morning.