Read the schematic diagram of atmospheric circulation distribution in the northern hemisphere and answer: (1) Draw an arrow in the diagram, indicating "three-circle circulation" (2) The pressure area

Read the schematic diagram of atmospheric circulation distribution in the northern hemisphere and answer: (1) Draw an arrow in the diagram, indicating "three-circle circulation" (2) The pressure area A in the diagram is _ _ _ _ _ _ _ _ _ _. (1) The equator is a heat source because of the high temperature all the year round, and the air rises, forming an equatorial low-pressure area near the ground and a high-pressure area at the equator. The air flows from the high pressure area above the equator to the poles, and gradually deflects (north, right, south, left, generally eastward) under the action of geostrophic deflector, and turns to the west wind (moving eastward) when it reaches latitude 30. In the case of continuous accumulation (accumulation), a downward airflow is generated, forming a subtropical high region (latitude 30). The polar region is a cold source because of the perennial low temperature, and the airflow sinks all the year round, forming a polar high pressure area near the ground and a relatively low pressure area at latitude 60, which is called the subtropical low pressure area. In this way, three circles of circulation are formed, namely, low latitude circulation, middle latitude circulation and high latitude circulation.

(2) 90 is the polar high pressure area, 60 is the sub-polar low pressure area, 30 is the subtropical high pressure area, and 0 is the equatorial low pressure area. In the picture, A is near the equator, C is near 30, E is near 60 and G is near 90.

(3) 0-30? (b) The wind area near the ground is a trade wind area, and the wind direction in the northern hemisphere is northeast wind and the wind direction in the southern hemisphere is southeast wind. 30-60 (? d？ The wind belt near the ground is westerly, the wind direction in the northern hemisphere is southwest, and the wind direction in the southern hemisphere is northwest .60-90 (? f？ The wind belt near the ground is polar easterly wind, the wind direction in the northern hemisphere is northeast wind, and the wind direction in the southern hemisphere is southeast wind.

(4)D？ It's a westerly belt, and the E is about 60 degrees, which is a sub-polar low pressure belt. The westerly wind direction is from low latitude to high latitude, and the temperature drops, which is easy to form precipitation. Sub-polar low pressure zone? Updraft is prevalent and it is easy to form precipitation.

(5)C is near 30 degrees, which belongs to subtropical high pressure area, and downdraft prevails, resulting in less rainy weather.

So the answer is:

(1) as shown in the figure:

(2) equatorial low pressure area, subtropical high pressure area, subtropical low pressure area and polar high pressure area

(3) polar easterlies in the mid-latitude westerly belt of the northeast trade wind belt.

(4) More? Sub-polar low pressure area? The prevailing updraft is easy to form precipitation. The direction of the west wind is from low latitude to high latitude, and the temperature drops, which is easy to form precipitation.

(5) It is not common in downward flow.