Diurnal variation characteristics and geographical distribution characteristics of temperature
The diurnal and annual variation characteristics of temperature and geographical distribution characteristics are as follows:
The daily temperature variation of temperature is that the temperature is highest at 14 o'clock in the afternoon in each place, and the temperature is the lowest around sunrise in the morning, with a wave-like distribution. The annual change characteristics are that the annual temperature changes in low latitudes are small, and the changes in temperate and cold zones are large. The land temperature in the northern hemisphere is the highest in July and the lowest in January. The opposite distribution characteristics are received in the southern hemisphere.
In meteorology, the physical quantity that expresses the degree of hotness and coldness of the air is called air temperature, or air temperature for short. The international standard unit of temperature measurement is degrees Celsius (℃).
The temperature mentioned in the weather forecast refers to the air temperature measured in the open air without direct sunlight (usually measured in a blind box). The maximum temperature is the highest value of the temperature in a day, which usually occurs between 14 and 15 o'clock; the minimum temperature is the lowest value of the temperature in a day, which usually occurs before sunrise.
Definition:
The temperature mentioned in the weather forecast is measured on a thermometer in a shutter box 1.5 meters above the ground in the observation field. It has good ventilation and avoids direct sunlight, so it has good representativeness. The difference in temperature is one of the main factors causing the difference between the natural landscape and our living environment, and is very closely related to our lives.
Air temperature records can characterize the thermal conditions of a place and are indispensable both in theoretical research and in applications in national defense and economic construction.
Temperature is one of the conventional elements to be measured in ground meteorological observations. The temperature has regular temperature (the basic station observes 4 times a day, at 02, 08, 14, and 20 hours respectively; some stations observe 3 times a day according to actual conditions, at 08, 14, and 20 hours respectively) . The base station observes 24 times a day), the daily maximum and daily minimum temperatures.
Diurnal variation, the highest temperature is around 2 o'clock in the afternoon, and the lowest temperature is around sunrise. Annual changes, July is the hottest and January is the coldest on land in the Northern Hemisphere, August is the hottest and February is the coldest on the ocean; the Southern Hemisphere is opposite to the Northern Hemisphere.