The Enormous Potential Energy (Heat), Accumulated by the Northern Adriatic During All Summer, in Autumn is Transferred from the Sea to the Atmosphere, Becoming Effective and Evident; Trieste Coast, FVG, Italia
09-September-2022: this is the third Local Severe Thunderstorm, which forms directly above the sea surface of the Gulf of Trieste, in just 12h.
The sea is charged with heat (potential energy) as early as April and until mid-August, when the air heat remains strong, but the sun loses power, lower on the horizon, with fewer hours of sunshine and longer nights, therefore not able to keep the waters so warm.
At this point, after having accumulated for months, the sea begins to gradually release the heat (and humidity) which transforms the troposphere into a pressure cooker (Cape Index); the arrival of the first real Atlantic fronts, with fresher air, are the spark and exploit the energy involved, transforming it into severe thunderstorms.
The transfer of heat, from the overheated North Adriatic to the atmosphere, is particularly strong between late August and mid October, then becomes progressively less intense with a more decisive cooling of the local shallow waters, but continues on a larger scale involving the whole Mediterranean, where the heat continues to be released into the atmosphere very decisively.
The complete period of maximum atmospheric liveliness in the Northern Mediterranean area - late August/mid December - over the years, is becoming the only sort of "rainy season" of the 4 that occurred at this latitude - 45° North.
The others have often become the domain of the African anticyclone which can do nothing only in autumn when atmosphere "explodes".
In any case, the Mediterranean and the Eastern Atlantic have the potential to still affect all seasons, given their waters remain mild and active even between winter and spring, although the energy involved is lower and this helps African HP to take root by stabilizing the weather for long periods, even 15 consecutive months as happened between June 2021 and August 2022, when not even in autumn it was possible to exploit the summer potential, but the latter situation is to be considered an exception and not a trend.
The trend is to no longer have 4 moderately (or intensely as in the south-eastern Alps) rainy seasons, but 3 mainly dry and only one rainy peak, in autumn.
Evidently it is a form of tropicalization of the Mediterranean area where it happens that even large accumulations of energy may not be sufficient to create thunderstorms and rains, as is always the case in these "new" Mediterranean summers characterized by oppressive heat and the presence of almost constant sun.
In autumn, the atmospheric liveliness manages to move HP and bring the Atlantic and Arctic fronts to the fore with often spectacular'n'dramatic consequences.
The Enormous Potential Energy (Heat), Accumulated by the Northern Adriatic During All Summer, in Autumn is Transferred from the Sea to the Atmosphere, Becoming Effective and Evident; Trieste Coast, FVG, Italia
09-September-2022: this is the third Local Severe Thunderstorm, which forms directly above the sea surface of the Gulf of Trieste, in just 12h.
The sea is charged with heat (potential energy) as early as April and until mid-August, when the air heat remains strong, but the sun loses power, lower on the horizon, with fewer hours of sunshine and longer nights, therefore not able to keep the waters so warm.
At this point, after having accumulated for months, the sea begins to gradually release the heat (and humidity) which transforms the troposphere into a pressure cooker (Cape Index); the arrival of the first real Atlantic fronts, with fresher air, are the spark and exploit the energy involved, transforming it into severe thunderstorms.
The transfer of heat, from the overheated North Adriatic to the atmosphere, is particularly strong between late August and mid October, then becomes progressively less intense with a more decisive cooling of the local shallow waters, but continues on a larger scale involving the whole Mediterranean, where the heat continues to be released into the atmosphere very decisively.
The complete period of maximum atmospheric liveliness in the Northern Mediterranean area - late August/mid December - over the years, is becoming the only sort of "rainy season" of the 4 that occurred at this latitude - 45° North.
The others have often become the domain of the African anticyclone which can do nothing only in autumn when atmosphere "explodes".
In any case, the Mediterranean and the Eastern Atlantic have the potential to still affect all seasons, given their waters remain mild and active even between winter and spring, although the energy involved is lower and this helps African HP to take root by stabilizing the weather for long periods, even 15 consecutive months as happened between June 2021 and August 2022, when not even in autumn it was possible to exploit the summer potential, but the latter situation is to be considered an exception and not a trend.
The trend is to no longer have 4 moderately (or intensely as in the south-eastern Alps) rainy seasons, but 3 mainly dry and only one rainy peak, in autumn.
Evidently it is a form of tropicalization of the Mediterranean area where it happens that even large accumulations of energy may not be sufficient to create thunderstorms and rains, as is always the case in these "new" Mediterranean summers characterized by oppressive heat and the presence of almost constant sun.
In autumn, the atmospheric liveliness manages to move HP and bring the Atlantic and Arctic fronts to the fore with often spectacular'n'dramatic consequences.