What are the factors that affect the daily temperature range and temperature annual range?

The daily temperature difference is also called the daily temperature difference. It is the difference between the highest temperature and the lowest temperature in a day. Its size is related to latitude, season, surface characteristics and weather conditions. The difference between the highest monthly average temperature and the lowest monthly average temperature in a year is called temperature annual range.

Latitude of factors affecting daily temperature range

The diurnal range decreases with the increase of latitude, because the change of solar height in a day decreases with the increase of latitude.

season

Generally speaking, the daily temperature difference in summer is greater than that in winter, but in the middle and high latitudes, the highest daily temperature difference generally appears in spring. Although the sun's altitude angle is large at noon in summer, the sunshine time is long, and the temperature is high during the day, but the temperature in the middle and high latitudes is also high at night, so the daily temperature difference in summer is not as big as that in spring.

zone

The diurnal temperature range of low concave terrain (basin and valley) is greater than that of flat land, and that of flat land is greater than that of convex land (hill). Low-concave terrain has large air contact area, poor ventilation during the day and poor heat dissipation, and low-temperature mountain wind is often blown at night, so the daily temperature difference is large.

The upper part of the protruding terrain has a small area, high altitude, and the temperature is mostly regulated by the surrounding air, so it is not easy to rise and fall at night and the daily temperature difference is small.

The flat land is in between.

The plateau is bigger than the plain: the plateau area has high altitude, thin atmosphere, strong solar radiation during the day and rapid temperature rise. At night, the atmospheric inverse radiation is weak, the heat dissipation is fast, the temperature drops rapidly, and the daily temperature difference is large. The plain area is low and flat, because of evaporation and other effects, the cloud amount is large, the solar radiation is weakened during the day, and the atmospheric inverse radiation is strong at night, which plays the role of ground insulation, so the daily temperature difference is small.

underlaying surface

The different properties of the underlying surface make the specific heat capacity different, so the absorption of solar radiation is different, which leads to different daily temperature difference changes. For example, the daily temperature difference on land is greater than that on the ocean.

What is the latitude that affects the daily temperature range?

The temperature annual range increases with the increase of latitude. This is because the annual variation of solar radiation energy increases with the increase of latitude. For example, the annual temperature variation of Xisha Islands (16 50' n) in China is only 6℃, that of Shanghai (31n) is 25℃, and that of Hailar (4913' n' n) is 46℃. The annual temperature in low latitudes is very low, and the annual temperature in high latitudes can reach 40 ~ 50℃.

Hailu

Due to the different thermal characteristics of land and ocean, compared with land and ocean at the same latitude, the difference of heat income between China mainland in winter and summer is greater than that of ocean, so the closer to the ocean, the greater the influence of ocean, the smaller the temperature annual range, and the farther away from the ocean, the smaller the influence of ocean and the greater the temperature annual range. Under normal circumstances, the annual temperature difference between temperate oceans is 1 1℃, and the mainland can reach 20 ~ 60℃. In addition, topography, weather and vegetation have the same influence on the temperature annual range as on the daily temperature range.

Terrain?

Generally speaking, highlands are smaller than depressions and valleys. The higher the altitude, the smaller the annual range.

How is the weather?

Areas with more clouds and less rain are smaller than areas with less clouds and less rain.

Vegetation?

The area with vegetation is smaller than the bare land.