What is the change and distribution of temperature?
The changes and distribution of air temperature are:
1. Air temperature refers to the temperature of the atmosphere. In life, people are more concerned about the highest and lowest temperatures in a day.
2. To describe the temperature of a region, it is also necessary to use the daily average temperature, the average temperature and the annual average temperature.
3. The temperature changes in a region are regular. The temperature changes with a one-day cycle are called daily temperature changes; the temperature changes with a one-year cycle are called annual temperature changes.
4. Use a temperature curve to represent changes in temperature over time.
5. During the day, the highest temperature occurs around 2 o'clock in the afternoon, and the lowest temperature occurs around sunrise; the difference between the highest temperature and the lowest temperature is called the daily temperature range.
6. During the year, the temperature in the Northern Hemisphere is usually highest in July and lowest in January on the continent, and highest in August and lowest in February on the ocean. (Opposite in the Southern Hemisphere). The difference between the highest average temperature and the lowest monthly average temperature in a year is called the annual temperature range.
7. The temperature observation instruments include a thermometer, a maximum temperature meter, and a minimum temperature meter, all of which are placed in a shutter (1.5 meters above the ground). Automatic meteorological observations are recorded once on the hour, and once on artificial hours 8, 14, 20, and 2.
8. There are different hot and cold conditions in different parts of the world, and the distribution of temperature is very different. Isotherm diagrams are usually used to represent the horizontal distribution of temperature. On an isotherm diagram, the air temperature at each point on the same isotherm line is equal.
9. Interpret the direction of temperature gradient according to the extension direction of the isotherm: If the isotherm extends along the east-west direction, it means that there is a temperature difference in the north-south direction.
10. Analyze the size of the temperature difference (referred to as the temperature difference) according to the density of the isotherms: For example, in areas with sparse isotherms, the temperature difference is small and opposite; in areas with dense isotherms, the temperature difference is large ( There is a saying in Xinjiang: the leather jacket wears yarn at noon).