(METEOGIORNALE.IT) Comes the real winter At the North Pole it started where there is a sensitive lowering of temperatures. Nothing exceptional, is intended, because indeed, compared to the period 1979/2000, the Arctic temperatures They are higher than the average.
And they are also compared to the thirty years that is officially used as a reference of the climate which is 1990/2020. Period that saw a Increase in average values of the North Pole among the major on the planet. So, it is winter, what begins in the north pole, but because the Polar Banchisa has reached his minimum annual On September 10, and therefore from 11 he began to grow. In this event there is no news that would make an early event understand.
But this novelty is of considerable relevanceand gives the website directly NOAA. All this will have repercussions on atmospheric time and temperatures of northern Europe.
It is completely normal that the entire band above the Arctic glacial sea is experiencing a period of quick coolinggreater than elsewhere, as the sun is now increasingly lower in the horizon, and therefore the solar radiation. And it is also normal that the temperatures dropped by various degrees below zero even during the day.
It must then be said that even if we live the global warmingthere are always the climate fluctuationsand these also originate waves of cold and heat, or to the atmospheric variabilitywhich, however, due to the increase in the global temperature, is accentuated.
A cooling affects part of Europe where cold air He reached Scandinavia, France and the Iberian peninsula. In the latter areas, just a few days ago there were also some heat recordwhich support the theme of greater atmospheric variability, also understood for the temperatures, not only for the time it does.
An event of early snow Compared to the last few years, there has been on the Icelandic coast, where, however, the warm air has now come and the snow has merged. At the same time, a furious heat wave It is affecting the Central Arctic Canada and part of Greenland, while a strong wave of frost of northern Siberia.
These are climatic fluctuationsdoes not mean that we will have a colder winter than other years. The winter season, and its climate is governed by complex balances And those who are called in a simplified way, climate indices.
And thermal collapse There has also been in the tormented by the warm Allava islands, where in the last winters there have been waves of insane heat that raised the thermometers to the point of raining in place of bringing dense snowfalls that are more suited for that place that I remember that for a few months a year it plunged into the year polar night. These islands are protected by the great frost also from the note Gulf current which mitigates the Atlantic Ocean and the side of the European Ancient Ocean.
And despite the most weak force of the Gulf current, various factors still generate a mild winter climatecompared to the same latitudes in Northern Europe, and also this year the polar Banchisa towards Europe will only form in the northern area, a completely normal situation. While the ice will block the Islands of Canada and reach the coasts of Russia from the island of Kola east.
As mentioned, the September 10th The minimum seasonal peak of the Banchisa Arctic was recorded, after which the ice resumed to form quickly. There Polar Banchisawhich tends to extend over most of the Arctic Ocean, is now growing day after day. However, the extension and it ice thickness remain considerably lower than what was observed, for example, in seventiesperiod characterized by a colder climate.
Il global warming In act, he certainly did not stop because the polar Banchisa is being reformed. Global warming mainly attributable toanthropic activity. According to numerous scientific studies, thehuman influence It would weigh about 70% on the current climate changewhile the remaining 30% would be attributable to natural causes. However, this aspect is rarely mentioned, perhaps for fear of minimizing the responsibility of greenhouse gas emissions. The natural fluctuations They are however an integral part of climatic variability, even if they generally take place on much longer times than we observe today.
In just a century, the global average temperature has increased by about 1,5 °Can exceptional fact if compared with the lens evolutions that have accompanied, for example, the alternation of glaciations, events that developed over thousands of years.
With the Arctic Banchisa in rapid expansionthe weather conditions will tend to become more and more dynamics in the coming weeks. October will be the month of climatic turning On the northern hemisphere, with November that could start even more lively atmospheric situations. This is also due to the start of a new natural event: the Niña.
The girl periodic phenomenon linked to the cooling of the surface waters of the Tropical Pacific. When it occurs, generates turbulence in the global climatefavoring greater exchanges of air masses along the meridians, which can translate into cold irruptions to the south. It is important to underline that Niña is not directly connected to the waves of Siberian cold, or that great frost which can fall into Europe and also freeze rivers. The Siberian icealso known Burian in Italy, is activated for different dynamics, including it StratWarming.
A curiosity, a rare and powerful StratWarming It took place in the south pole, or in Antarctica, and this risks generating a disarray in the spring of the southern hemisphere, where on the other hand, I would like to point out a strong cold phase, compared to the middle school 1990/2020, on most of Australia, where there were exceptional snowfalls in their winter (southern).
In summary, winter did his own entrance in the northern hemisphere, starting from Arctic regions and slowly advance towards more southern latitudes. And it will be the most northern areas of our hemisphere to experience the first effects, while in Italy a still awaited marked coolingfollowed by a very mild phase hypothesis in October. But winter will also arrive in Italy, and the risk is that it suddenly reaches greater atmospheric variability. In 2024 we had, for example, two very precocious cold wavesone in mid -September, with Siberian air, but not frost, but snow at low altitudes on the north alpine side, and two in November, a moderate in the first part, a full -bodied around 20, with Snow storms in half of Europe.
All appeared as a promising season of cold and snowbut then there was a decidedly mild season with very little rainfall, and no snow in Val Padana, for example, like the low altitudes of the rest of Italy.
Credits:
(METEOGIORNALE.IT)
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