What do you know about the spring equinox?

Temperature and precipitation

At the spring equinox, except for the alpine mountainous areas and areas north of 45° north latitude, where winter is all year round, the average daily temperature across China rises steadily above 0°C. At this time, the cold has passed away, especially in northern China and the Huanghuai Plain, where it is almost as rainy as in the Jiangnan region. At this time the cold has gone, the temperature rises faster, especially in northern China and the Huanghuai Plain, the average daily temperature almost the same time as the rainy south of the Jiangnan region rose above 10 ℃ and enter the bright spring.

Climatic characteristics

Sunshine and light on the day of the equinox, the sun almost directly on the equator, the vast majority of the world day and night are almost equal, but in the North Pole (90 ° north latitude) and the South Pole (90 ° south latitude) near the special phenomenon can be observed in the "sun on the horizon the whole day in a circle".

Barometric Pressure

Spring Equinox, East Asia trough weakened significantly, the westerly wind belt trough ridge activity increased significantly, Mongolia to the northeast there are often low-pressure activity and the development of cyclones, low-pressure movement to guide the south of the cold air, the northern region of windy and sandy weather. When the long wave trough eastward, by the convergence of cold and warm air masses, there will be continuous rain and inverted spring cold weather.

Sending Spring Bulls

During the spring equinox, the Jiangnan countryside will send spring bulls from house to house. The map is the two open red or yellow paper printed on the lunar calendar throughout the year, but also printed on the farmer plowing patterns, the name is "spring oxen map". Sent to the map are some folk good language singers, mainly say some spring plowing and auspicious not against the farming season, each to a family is the scene, see what to say what, said the owner of the joy and give money until.

Eating spring vegetables

Once upon a time, Siyi had a custom that was not a festival, called "spring equinox eating spring vegetables". "Spring vegetables" is a kind of wild amaranth, the villagers called "spring artemisia". On the day of the spring equinox, everyone in the village went to pick spring vegetables. When searching in the field, most of them are young and green, fine trees, about as long as the palm of the hand.