Spring is coming in many places in the north and south. When will spring come in Shanghai?

Spring has arrived in many places in the north and south. The answer to when spring will come in Shanghai is as follows:

The standard for spring in the meteorological sense is the average daily temperature for five consecutive days after the beginning of spring. The first day of spring is ≥10℃. In fact, the daily average temperature on February 28 and March 1 has reached the standard, but today’s average temperature should be lower than 10℃. Let’s look forward to the wave of warming around the 3rd and 4th.

In spring, the Earth's northern hemisphere begins to tilt toward the sun, receiving more and more direct sunlight, so the temperature begins to rise. In spring plants begin to sprout and grow, and many flowers bloom. Hibernating animals wake up, many animals that overwintered in eggs hatch, and birds begin to migrate, leaving their wintering grounds and heading toward their breeding grounds. Many animals go into heat during this time.

Therefore, China also calls spring the season of "recovery of all things". Because hot air begins to move north while cold air often lingers, land, water and air temperatures rise at different rates. From a meteorological point of view, my country belongs to a monsoon climate zone, and spring is a period of alternating transition between winter and summer monsoons. Cold air and warm and humid air currents wax and wane and do not give way to each other. In the southern region, a stream of cold air invades every once in a while in spring and combines with the southwest warm and humid air flow to form overcast and rainy weather.

There are many ways to divide the four seasons. In daily life, people usually regard the arrival of the Beginning of Spring as the beginning of spring. The Beginning of Spring is defined from an astronomical perspective. Meteorological departments generally divide the four seasons according to the solar calendar, with spring from March to May. However, this division method has disadvantages for some places. According to this method, March south of the Yangtze River in my country belongs to spring. At this time, the Yangtze River Basin is full of spring scenery, but Heilongjiang Province is still bitterly cold and snowy.

Therefore, meteorologists have developed a method to use the changes in temperature as the standard for dividing four seasons, that is, using the five-day average temperature as the standard. When the average temperature for the next five days in winter reaches a stable level of 10°C, spring begins. When the temperature is higher than 22°C, it means the end of spring and the beginning of summer.