The figure is a schematic diagram of the weather system (pressure value P 1 > P2 > P3). Read the picture and answer the following questions. Question 1: The weather system is a cyclone in the northern

The figure is a schematic diagram of the weather system (pressure value P 1 > P2 > P3). Read the picture and answer the following questions. Question 1: The weather system is a cyclone in the northern hemisphere.

Question 1:A

Question 2:B

Question 3: D.

Test analysis:

Question 1: air pressure value P 1 > P2 > P3, judging that the air pressure center is low pressure, it is a cyclone in terms of its airflow movement; According to the three forces and wind direction arrows at ①, the wind direction is oblique to the isobar, and from high pressure to low pressure, it is judged as D arrow, so it is judged that the wind direction is to the right, which is the northern hemisphere; The legend of the front at A is a cold front.

Question 2: Figure ② is located around the cyclone center, so it is wrong to judge the updraft prevailing in the vertical direction. Figure ③ ④ is located on the cold air mass side of the front, which is a rainy area, and B is correct; Because the frontal cyclone in the picture is in the northern hemisphere, ① it should be controlled by the warm air mass, ② it is controlled by the cold air mass, and C is wrong; ② Isobar is denser than ①, so it is wrong to judge that the wind force is stronger than ①.

Question 3: According to the stress state of horizontal air movement in Figure 1, the horizontal air pressure gradient force is perpendicular to the isobar, and it points from high pressure to low pressure, which is judged as arrow C; A is perpendicular to the wind direction and friction, which is judged as geostrophic deflection force; The wind direction crosses the isobar, pointing from high pressure to low pressure, and it is judged as D arrow.

Comments: This question is generally difficult and belongs to the basic test questions. Students should strengthen the implementation of basic knowledge points and the training of drawing and reading skills in their usual study. The key to solve the problem is to judge the airflow, weather characteristics, wind direction and three forces from the isobar distribution shown in the figure.