Analyze the schematic diagram of a weather system in the northern hemisphere, and answer in turn (12): (1) The high and low pressure center in the diagram: C is the air pressure, and D is&;

(1)

Analyze the schematic diagram of a weather system in the northern hemisphere, and answer in turn (12): (1) The high and low pressure center in the diagram: C is the air pressure, and D is&;

(1) high? low

(2) anticyclone? hurricane

(3) sinking? Rising? Shun? Inverse? Is that clear? cloudy and drizzly for days on end

(4) a? man

Test and analysis: According to the distribution characteristics of pressure field in the figure, it is not difficult to see that C is the center of high pressure and D is the center of low pressure. High and low pressure are the distribution characteristics of pressure field. In terms of airflow movement, the low pressure is a cyclone, and the near-surface airflow flows from all sides to the center, and the central airflow converges and rises. If it is in the northern hemisphere, the cyclone converges counterclockwise near the ground; High pressure is an anticyclone. The air near the ground diverges in all directions from the center, and the center is a downward airflow. In the northern hemisphere, the divergence direction of anticyclone is clockwise. In frontal cyclones, whether in the southern hemisphere or the northern hemisphere, there is always a cold front in the trough of low pressure on the west side and a warm front in the trough of low pressure on the east side. The precipitation of the cold front is behind the front, the position of A in the picture, and the precipitation of the warm front is before the front, and the position of Ding in the picture.

Comments: This question comprehensively examines the candidates' knowledge of airflow movement, corresponding pressure characteristics and weather characteristics of frontal cyclones in cyclone and anticyclone weather systems. The test requires candidates to have a strong ability to analyze problems, especially the knowledge about frontal cyclones in this question. The exam has a certain degree of difficulty, which belongs to the intermediate difficulty topic.