Traditional Culture Encyclopedia - Weather inquiry - What is the change of weather and atmosphere?
What is the change of weather and atmosphere?
Latitude, atmospheric circulation, land and sea distribution, ocean currents and topography are the main factors affecting climate. The first two are global zonal factors, while the last three are non-zonal factors.
Latitude position is the basic factor affecting climate. Because the earth is a big sphere, the sun shines at different angles at different latitudes. Some places are direct, some places are oblique, and some places have not been exposed to the sun all day or for months. So the altitude angle of the sun is different in different places, the amount of heat and light of the sun is also different, and the temperature is also very different. Generally, the lower the latitude, the higher the temperature; The higher the latitude, the lower the temperature. Different latitudes in different regions are the main reasons for different global temperatures.
Atmospheric circulation is the main factor that forms various climate types and weather changes. The air in the atmosphere moves at different scales, which is collectively called atmospheric circulation. It is an important way to transport and exchange heat and water vapor in the atmosphere. The manifestations of atmospheric circulation include planetary wind system, monsoon circulation, land-sea wind and valley wind. What people usually call atmospheric circulation mainly refers to planetary wind system. The influence of atmospheric circulation on climate is very significant, with strong updraft, easy condensation of water vapor and abundant precipitation in equatorial low pressure area. Submerged water vapor prevails in subtropical high pressure area, which is not easy to condense and the rain is scarce; In trade winds, air flows from higher latitudes to lower latitudes, and water vapor is not easy to condense, so it usually rains less. But on the east coast of the mainland, the trade winds blow from the sea, and there are more opportunities for precipitation; On the west coast of the mainland, the trade winds blow from the inland, so there is less precipitation. In the area controlled by the westerly belt, the wind from the west coast of the mainland blows from the sea, with abundant water vapor and precipitation. The farther inland, the less water vapor and the less precipitation. On the east coast of the mainland, the west wind blows from the inland, with less precipitation. Generally speaking, the temperature of updraft and airflow changes from high to low from low latitude to high latitude, and water vapor is easy to condense, so there are more opportunities for precipitation. In the downward flow and the airflow from high latitude to low latitude, the temperature changes from low to high, so the water vapor is not easy to condense and there are fewer opportunities for precipitation. Therefore, under the control of different pressure belts and wind belts, the climate characteristics, especially the changes of precipitation, are obviously different. In addition, the wind belt and pressure belt move with the seasons, thus forming various climate types.
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