What Are the Common Causes of Severe Chills?

Extremely cold, the full name of extreme cold weather, refers to the low temperature and coldness in winter. The "extreme cold" defined and listed in the meteorological book shall be the abbreviation of "extremely cold weather" or "extremely cold weather environment" or "extremely cold temperature environment". The degree of low temperature and cold in winter has always been of concern to people, and it is often measured by the temperature in degrees Celsius, such as -4 ° C, -10 ° C and so on. ^[1]

Extreme cold

(Degree of coldness)

In order to accurately express the degree of coldness, a coldness degree table has been developed in the meteorology major, with temperatures ranging from below -40 ° C to 9.9 ° C, from low to high, divided into eight levels:

In 2012, the world was generally cold. Some experts believe that it is because of the influence of the Arctic Oscillation. When the Arctic Oscillation is in the positive phase (positive state), the pressure field in the polar region and the middle and high latitude regions outside the polar region forms a "south high and low north" situation, and cold air stays in the polar region. "), A situation of" high in the north and low in the south "was formed, and polar cold air spread south, bringing cold weather to the middle and high latitudes, causing rare cold blizzards in Europe and eastern Asia. At the same time, the transport of water vapor from the North Atlantic to the Mediterranean and the Northwest Pacific merges with the strong cold air in the north, which also contributes to the blizzard.