Causes of the cold front in China in June 5438+February.

(1) According to the isobar diagram, it can be judged that A is the high pressure center, and the position of the high pressure ridge can be drawn.

(2)A is the high pressure center, and it is an anticyclone according to the airflow conditions. The main reason for the formation of a pressure center is the difference of thermal properties between land and sea.

(3) Specifically, the wind direction is from high pressure to low pressure, and the northern hemisphere deflects to the right, forming a northerly wind (northwest wind, north wind) at point E; Wind power depends on the density of isobars. The denser the isobar, the stronger the wind. Compared with point F, the wind at point E is stronger.

(4) The front C in figure 1 is a cold front, which corresponds to the front A in figure 2.

(5) The cold air mass is located under the front. In a and b of fig. 2, AC is a cold air mass.

(6) The main front affecting the winter weather in China is the cold front, corresponding to Figure 2.

(7) Ground C is affected by cold front, and its weather features are strong wind, snowfall and cooling, so it is selected as BD.

(8) From G to D, from being controlled by a single cold air mass-after the cold front-before the warm front, the air pressure value first decreases and then increases, and the weather changes from sunny-rainy-sunny-rainy.

So the answer is:

( 1)

(2) The thermal properties of anticyclones on land and sea are different.

③ northerly wind (northwest wind, north wind) e

(4) Answer

(5)AC？

(6) a?

(7) Buildings Department

(8) First get smaller and then get bigger? monkey's wedding