The difference of temperature is one of the main factors that cause the difference between natural landscape and our living environment. Temperature records can characterize the thermal characteristics of a place, which is indispensable in both theoretical research and the application of national defense and economic construction.
The temperature has a fixed temperature (the basic station observes four times a day, and the four hours are 02, 08, 14 and 20 respectively; According to the actual situation, some stations observe three times a day, at 08: 00, 14 and 20: 00 respectively. Reference station observation 24 times a day), as well as the daily maximum and daily minimum temperature.
Extended data:
Temperature changes are divided into daily changes and annual changes. Daily changes, the highest temperature is around 2 pm, and the lowest temperature is around sunrise. The annual change shows that it is the hottest in July, the coldest in June, the hottest in August and the coldest in February in the northern hemisphere in 65438+ 10. The southern hemisphere is opposite to the northern hemisphere.
It decreases from low latitude to high latitude, so the isotherm is generally parallel to latitude. The temperature of the sea and land at the same latitude is different. In summer, the isotherm protrudes in the direction of high latitude on land and in the direction of low latitude on the ocean.
Central Meteorological Observatory-Chengdu Weather Forecast