Read the map of the northern hemisphere near-surface weather system (hPa) and answer the following questions. (22 points) (1) According to the air pressure, ① is the center of _ _ _ _ _ _ _ _, ③ is th

Read the map of the northern hemisphere near-surface weather system (hPa) and answer the following questions. (22 points) (1) According to the air pressure, ① is the center of _ _ _ _ _ _ _ _, ③ is the ground.

(1) high pressure and low pressure

(2) Northwest (North)? ②? ② Isobars are dense, and the horizontal pressure gradient force is large.

(3) After the cold front with low temperature and fine weather passes, the land is controlled by the ridge of high pressure.

(4) The area will be affected by cold front activities: before crossing the border, it will be controlled by a warm air mass and the weather will be fine.

When crossing the border: affected by cold front activities, it will experience a gale, rainstorm (snow), cooling and other weather (or rainy weather).

After crossing the border: controlled by the cold air mass, the temperature drops and the weather turns fine.

Test analysis:

(1) Reading the map, ① Isobar is closed, and the central air pressure is high, which is a high pressure center; ③ Isobar is closed, and the central air pressure is low, which is a low-pressure center.

(2) The ground is located on the east side of the high pressure center in the northern hemisphere, and the northwest wind blows; ② The isobar on the ground is denser than that on the ground, and the horizontal pressure gradient force is greater and the wind force is greater;

(3) (4) Controlled by cold air mass and high pressure ridge, the weather is cold and sunny;

(4) (5) At present, the land is in front of the cold front and will experience a cold front transit.