What does cold air mean?

Cold air refers to the air horizontally located in the low temperature area.

Cold air and warm air are defined by the horizontal difference of temperature. The remote polar regions, the Arctic Ocean and cold Siberia are the cradles of cold air. The range of cold air mass can be as long as thousands of miles and the thickness can reach several kilometers to dozens of kilometers. Cold air is divided into five grades, namely weak cold air, moderate intensity cold air, strong cold air, strong cold air and cold wave.

Knowledge expansion

Cold air refers to air from polar regions or cold regions. In the low temperature region of the earth, cold air will form a high pressure system, which can flow to low latitudes. The temperature of cold air in the horizontal direction is relatively low, usually about 10-20℃ lower than the ambient air temperature. When cold air flows to low latitudes, it will meet with local warm air, forming weather phenomena such as clouds and precipitation.

The influence of cold air varies with regions and seasons. Cold air in winter usually brings bad weather such as low temperature and snowfall, which brings inconvenience to people's production and life. In summer, cold air may bring weather changes such as cooling and rainfall, which brings some coolness and comfort to people.

The flow of cold air is also affected by many factors, such as topography, climate, land and sea breeze. For example, in winter in Asia, cold air usually travels south from Siberia and Mongolia, causing cold waves, snowstorms and other bad weather. In summer in Europe, cold air may travel south from the North Pole, bringing some coolness and comfort.

In meteorology, the flow of cold air is usually monitored and analyzed by meteorological maps and meteorological satellites. Meteorologists can provide early warning and service for people's production and life by forecasting and analyzing the intensity, moving direction and speed of cold air.

In a word, cold air refers to air from polar regions or cold zones, which forms a high-pressure system in the low-temperature region of the earth and flows to low latitudes. It has an important impact on people's production and life, and meteorologists need to monitor and analyze it to provide early warning and services for people.