Read the map of near-surface weather system in the northern hemisphere and answer the following questions. (13) (1) According to the air pressure, A is the center and B is&; niobium (Nb)

(1) high pressure (1) low pressure (1)? B( 1)？

Reason: B is located in the center of low pressure, and rainy weather often occurs (1). During the day, the atmosphere has a strong weakening effect on solar radiation (1), and the temperature will not be too high. At night, the atmospheric inverse radiation is strong, the temperature is not too low, and the temperature difference between day and night is small (1).

(2) Strong wind, cooling, rain and snow (1)? Cold front (1 min)

(3) northwest (north) (1) F( 1) isobars are dense, and the horizontal pressure gradient force is large (1)

(4)(2 points)

This topic studies weather systems.

The center at (1)A is surrounded by high pressure, so it is called high pressure center according to the air pressure; The air pressure in the center B is lower than that in the surrounding area, which is a low-pressure center. High pressure control, sunny weather, large temperature difference between day and night;

(2) The cold front at C is about to move to C, so there will be cold front weather;

(3) The wind direction can be directly judged according to the isobar distribution: the horizontal pressure gradient force is perpendicular to the isobar and points from high pressure to low pressure; The geostrophic bias drew a picture to the right in the northern hemisphere. On the same isobar diagram, the wind speed depends on the density of isobar;

(4)B is the center for low pressure; considering that the rotational force of the northern hemisphere is to the right and the horizontal direction is consistent; Updraft is dominant in the vertical direction.