Why does the earth get so cold in winter when it gets hotter?
Why does the earth get so cold in winter when it gets hotter?
What is Ural Blocking?
Tall and strong anticyclone is created in the Ural Mountains of Russia and near the Kara Sea and Barenz Sea of northern Russia.
Abnormally created near the Ural Mountains, tall and strong anticyclone blocks the flow of jet streams in the Northern Hemisphere along similar latitudes and causes them to bend significantly. This is why the name is Blocking High, so-called Blocking. Usually, when blocking is made, relatively warm air rises to the west of the blocking, while cold air rises to the east of the blocking.
After all, Ural Blocking is playing a role in bringing cold air in the Arctic to East Asia, where the Korean Peninsula is located. Abnormal Ural Blocking is bringing a record cold snap.
Source : APEC
What are the causes of Blocking development?
Although not all of the reasons for the strong development of blocking have been revealed yet, it is assumed that it is related to the high temperature phenomenon in the Arctic. In fact, the recent record high temperatures in the Arctic have caused record melting of sea ice in the Kara Sea and Barentz Sea in northern Russia. It is the same that sea ice melted down near the Chucki Sea and the Bering Sea.
High temperatures in the Arctic, especially near the Ural Mountains, Kara Sea, Barenz Sea, and the Bering Sea, melted the sea ice, and this high temperature created the strongest cold wave on the Korean Peninsula.
Arctic sea ice map
Source : NIMS
Especially, the glacial area of Barentz and Kara Sea has a significant impact on the formation of Ural blocking. Less than usual sea ice areas provide heat to the atmosphere from the oceans near Barentz and the Kara Sea. This has a positive effect on the occurrence of Ural blocking, which leads to the development of anticyclone deviation. The upper atmospheric pressure troughs in Siberia and East Asia are strengthened on the side of the wind, and the temperature in Korea remains lower than usual.
Arctic sea ice
Source : NASA