High school geographic weather system video

1, the slope (that is, the angle between the front line and the ground) is different.

Because the cold air mass moves quickly, the cold air mass in the cold front pushes the front to move quickly, and the warm air mass rises quickly, so the slope of the cold front is large.

In the warm front, the warm air mass slowly climbs above the cold air mass, pushing the front to move slowly, so the slope of the warm front is small.

2. The location and range of precipitation are different.

The cold front precipitation mainly appears behind and near the front, and the rain area is narrow.

The warm front precipitation is in front of the front, and the rain area is wide.

3. The time and intensity of precipitation are different.

The cold front has short precipitation time and high intensity.

Warm front has long precipitation time and low intensity.

4. The weather changes differently.

When a cold front crosses the border, it usually appears cloudy, windy, rainy (snowy) and cool. After the cold front crossed the border, the cold air mass occupied the position of the original warm air mass, and the temperature dropped, the humidity dropped, the air pressure rose, and the weather turned fine.

When the warm front crosses the border, the clouds become thicker and cover the sky, often forming continuous precipitation (that is, long-term continuous precipitation). After the warm front crossed the border, the weather was controlled by the warm air mass, and the temperature increased, the humidity increased, the air pressure decreased, and the weather turned fine.

The difference between cyclone and anticyclone:

First, the direction is different.

Cyclone: the horizontal airflow in the atmosphere is a large vortex rotating counterclockwise (clockwise), radiating from all sides to the center, counterclockwise in the northern hemisphere and clockwise in the southern hemisphere.

Anti-cyclone: In the northern hemisphere, the airflow in the anti-cyclone area rotates clockwise from the center to the outside, and counterclockwise in the southern hemisphere.

Second, the pressure distribution is different.

At the same height, the air pressure in the center of the cyclone is lower than that around it, which is also called low pressure. Cyclones are similar to circles or ellipses, and their sizes vary greatly.

Anti-cyclone is a high pressure area where the isobar is closed and the air pressure decreases outward from the center, so it is also called high pressure.

Third, the weather is different.

The cyclone vertical airflow rises, and the rain is continuous. The typhoon that affects the southeast coastal areas of China in summer and autumn is a kind of cyclone. In cyclones, the weather often changes dramatically, which is the weather system that people are most concerned about and studied at the earliest.

The near-surface airflow of anticyclone radiates from the center to the periphery in the horizontal direction, and the air in the vertical direction supplements from top to bottom. In the process of sinking, the temperature rises, and the water vapor is not easy to condense, and the areas controlled by anticyclones are mostly sunny.

Baidu Encyclopedia-Cyclones and Anticyclones

Baidu encyclopedia-cold and warm front