Weather on the street not always corresponds to promises of meteorologists. In spite of the fact that in the world thousands of meteorological stations work, cannot precisely count weather even modern supercomputers. And all because the atmosphere parameters defining weather easily change under the influence of any given factors.
Instruction
1. When heating a body extend and vice versa – these data can be found even in the school textbook by physics. Atmospheric air submits to the same regularities. When heating by the sun it extends, its warm streams rise up, at the same time pressure falls. At a cold snap air, on the contrary, contracts, becomes more dense, pressure grows. The size of atmospheric pressure is influenced also by area height above sea level. The it is higher, the indications of a barometer are lower. With increase in height also air temperature falls.
2. Pressure drop, as well as its increase, leads to emergence of wind as air flows direct from areas with high pressure in the field of low. It, in turn, causes change of weather. Reduction of pressure usually says that weather will deteriorate soon. To the contrary, its increase at rainy weather signals about fast clearing. Why so it turns out? When the barometer falls, air from areas with more high pressure begins to arrive, bringing clouds. When indications of a barometer grow, air begins to spread in the area with smaller pressure, carrying away with itself atmospheric moisture.
3. Come in hot summer day to the seashore. Where does wind blow? From the sea on the land. Why? Because the soil heats up quicker the earth less teployemk), from it warm air gets warm and rises up, pressure falls. Streams of more cool and dense air come to its place from the sea. At night all on the contrary: the sea which heated up in a day gives warmly to air, its streams rise, they are succeeded by cool air from the coast.
4. One weather More cyclones and anti-cyclones influence. The cyclone is characterized by the lowered pressure of air and whirl counterclockwise. At an anti-cyclone all on the contrary - the movement clockwise, pressure increased. The cyclone is always followed by strong winds, an anti-cyclone – a calm or a light breeze. The cyclone brings rains and snowfalls, an anti-cyclone – a steady clear weather.