How to see the air pressure based on the isobars distribution diagram?

Isobars bulge upwards, indicating low pressure. On the contrary, high pressure means wind always blows from the high pressure center to low pressure areas. Judging from southeast, northwest, the direction of the wind refers to the direction from which it blows, such as ↙ It is the northeast wind. By analogy, dense isobars cannot represent the high-pressure center. Dense isobars indicate that the wind volume is large here.

Weather: 1. Wind blowing from high latitudes to low latitudes: cold and dry. 2. Wind blowing from low latitudes to high latitudes: warm and humid. 3. When low pressure passes through, it will be rainy; high pressure When crossing the border, the weather is mostly sunny. 4. The low pressure center and low pressure trough control the rainy weather, and the high pressure center and high pressure ridge control the sunny weather.

Day and night temperature difference: Compare the daily temperature difference between the two places on the isobar diagram. The essence is to examine the weather conditions of the two. If it is in a low-pressure center, it will be mostly rainy weather with a small temperature difference between day and night; if it is a high-pressure center, it will be mostly sunny with a large temperature difference between day and night. If it is located in a low-pressure trough, it must be judged Is a cold front or a warm front forming in this place, in front of or behind the front? Generally, there is rain and snow weather after the cold front, that is, rainy weather, and the temperature difference is small; before the cold front, it is usually sunny weather, and the temperature difference is large. If it is a warm front, it is in front of the front. It is cloudy and rainy weather with a small temperature difference. Behind the front is sunny weather with a large temperature difference. The high pressure center and high pressure ridge must be sunny weather. The answer can be obtained by judging the weather conditions in the two places.

Isobaric The line is curved and closed, and the value gradually decreases from outside to inside, which is a cyclone; the value gradually increases from outside to inside, which is an anticyclone.

Several isobars approach one of the isobars, and the distance between the isobars gradually becomes smaller, indicating that the pressure difference is gradually increasing, indicating the existence of a front. When the isobars at the front bend toward the side with a larger value, it is a warm front; when it bends toward the side with a smaller value, it is a cold front.