The Siberian high is rebuilding itself, does this herald the arrival of cold waves?

Arab Weather - Weather experts at the Arab Weather Regional Center are following up on the latest outputs of weather maps specializing in the distribution of atmospheric pressures and temperatures in the upper latitudes of the northern hemisphere, specifically the Siberia region, where experts have noticed that the Siberian continental high has begun to rebuild itself, as atmospheric pressure values reach more than 1040 amid temperatures below zero Celsius by about 25 degrees Celsius.

The high pressure system is rebuilding itself in its home region, accompanied by a very cold and dry air mass.

In detail, with the onset of autumn, the sun's rays begin to gradually decrease in the northern regions of the globe, including Siberia. Solar radiation decreases, which leads to a rapid cooling of the Earth's surface, especially at night. This cooling causes the air mass close to the Earth's surface to cool, and with the long nights that characterize autumn in Siberia, the Earth's surface loses heat rapidly as a result of the process of radiative cooling, where the heat stored in the Earth is released into space, which cools the surface layer of air.

Cold air is dense and heavy, so it begins to collect at the surface. The denser the cold air, the higher the atmospheric pressure over the area, which leads to the formation of the Siberian High at the level of 1000 to 850 millibars (the Siberian High does not build higher than that due to the heaviness and high density of the cold air). Cold winds coming from the Arctic enhance the cold air over Siberia, which increases the strength of the high. It contributes to its formation on a large scale.

Although the Siberian High is slow to build in the fall, it has already begun as the surface air becomes colder, denser and the air pressure rises, announcing the construction of the Siberian High, which becomes more stable and stronger as winter progresses, making it one of the most important weather systems in the Northern Hemisphere during the fall and winter.

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Does the formation of the Siberian high herald the approach of cold waves to the region?

The Siberian system is considered one of the most important sources of cold continental air masses, especially the continental polar air masses. Despite the beginning of the construction of the Siberian high, it does not cause severe cold waves except in the areas it controls, and its development does not necessarily mean that cold waves are close to the Arab world. However, the Siberian high affects the climate, over different time periods, mainly in several wide geographical areas during the fall and winter seasons, and these areas include:

Siberia and Central Asia: The Siberian High is the center of atmospheric pressure over Siberia, and it directly affects these regions, bringing with it very cold and dry air.

East Asia: The Siberian High greatly influences the weather in China, Mongolia, and North and South Korea. The high brings cold northerly winds that cause temperatures to drop sharply in winter.

Japan: When Japan is affected by the Siberian High, some western and northern areas can experience heavy snowfall due to the influence of polar winds from Siberia on moist air coming from the Sea of Japan.

Eastern Europe: The influence of the Siberian High sometimes extends to parts of Eastern Europe such as Russia, Ukraine, and Belarus, leading to very cold and dry winters in these areas.

Arabian Peninsula and Middle East: In some cases, the influence of the Siberian High extends to areas of the Middle East during some periods, especially in late autumn and winter, including the Levant and the Arabian Peninsula. This leads to dry cold waves, causing a significant drop in temperatures in winter.

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India: The Siberian High affects the winter monsoon in India, pushing dry, cold winds towards South Asia, leading to cold, dry conditions, especially in northern India.