Traditional Culture Encyclopedia - Weather forecast - Influencing factors of daily range
Influencing factors of daily range
1, the low latitude area is larger than the high latitude area: the average value of low latitude area is 12℃, the middle latitude area is 7-9℃, and the high latitude area is 3-4℃. Reason: The lower the latitude, the greater the daily variation of the sun's height.
2. In mid-latitude area, summer is greater than winter, but in low-latitude and high-latitude areas, it doesn't change much with the seasons.
3. As far as land and sea are concerned, the ocean is smaller than the inland: the average ocean is only 1-2℃, and the inland can reach 15℃, even 25-30℃. Reason: the difference of thermal properties between land and sea.
As far as the weather is concerned, the daily range of cloudy days is smaller than that of sunny days. The reason is that on cloudy days, the atmosphere weakens solar radiation and heat preservation more.
5. As far as topography is concerned, the valley is bigger than the peak, and the depression is bigger than the height. Mountains are smaller than plains. Affected by the heat source in the troposphere. The main heat source of troposphere atmosphere comes directly from the underlying surface, so the temperature changes with the underlying surface temperature. Affected by the temperature change of the underlying surface, the closer the troposphere atmosphere is to the underlying surface, the higher the average temperature and the greater the daily variation range of temperature.
6, related to the nature of the surface. Turpan basin in northwest China is known as "wearing fur coats in the morning, wearing clothes in the afternoon, and eating watermelon in the stove". In areas with large daily temperature difference above 15℃, there is generally plenty of sunshine, strong solar radiation and high temperature during the day, which is beneficial to plant photosynthesis and can produce and accumulate more nutrients.
The influence of temperature on human beings;
1, the influence of the characteristics of urban underlying surface (the contact surface between atmospheric bottom and surface)
A large number of artificial structures in the city, such as paving the ground and various building walls, have changed the thermal properties of the underlying surface. Urban surface water content is less, and more heat enters the air in the form of sensible heat, which leads to air warming. At the same time, the absorption rate of sunlight on the urban surface is higher than that on the natural surface, which can absorb more solar radiation, so that the air can get more heat and the temperature will rise.
2. Urban air pollution
Motor vehicles, industrial production and a large number of people's activities in cities produce a lot of nitrogen oxides, carbon dioxide, dust and so on, which can absorb a lot of energy from the thermal radiation in the environment, produce a well-known greenhouse effect, and cause further warming of the atmosphere.
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