When is plum blossom day in 2023?
Plum blossom, also known as "broken plum blossom", is the end date of plum rain in the middle and lower reaches of the Yangtze River in early summer. During the meiyu period, the meiyu front system and the main rain belt obviously moved out of the middle and lower reaches of the Yangtze River. If there are less than two rainy days in five days in this area, the maximum temperature of each station in this area obviously rises above 30℃, and the southerly wind speed on the ground also increases obviously, it is designated as plum blossom. The current calendar in China adopts the saying of "Shenshu Jing", that is, plum blossoms bloom from July 8th to19th, the first unfinished day after the slight summer heat.
In some years, the plum blossom period will be postponed, for example, 1954 will be postponed to August 2, and the plum rain period will last for 63 days. After the meiyu, most areas entered the high temperature season in midsummer. The entry and exit of plums determined in meteorology is different from that in almanac. In meteorology, the division of plum blossom into plum blossom, plum blossom out and plum rain period is based on the weather circulation situation of Dafan. Geographical distribution characteristics of weather system, geographical distribution position of precipitation and changes of meteorological elements.
Plum production standard
In June and July, it was 125- 140 on the 500mb map in the northern hemisphere. The ridge line of the western Pacific subtropical high at 23-24 degrees Celsius in southern Zhejiang and 24-25 degrees Celsius in northern Zhejiang has been stable for five days or more. After continuous rainy days, there are seven or more days without rain in southern Zhejiang, and five or more days without rain in northern Zhejiang (excluding precipitation caused by tropical system in the south and local geothermal thunderstorms).
The average daily temperature is stable above 25 degrees. The daily average temperature and pressure time curve of a single station have increased synchronously. During this period, the continuous rainy weather is still greater than or equal to 0. 1 mm, and the daily rainfall is greater than or equal to1.0mm.. 120- 130 after the rainy season. The ridge line of subtropical high jumps northward to 26 or its north, with the daily average temperature ≥27℃ and the highest temperature ≥ 330℃, and there is no rain for more than 6 consecutive days.
The average opening date of plum blossoms is July 9. When the subtropical high ridge jumped northward to the north of 26 and stabilized for more than 3 days, the last provincial precipitation process in Hankou, controlled by the subtropical high peripheral line, ended and was designated as Meihua.
The above contents refer to Baidu Encyclopedia-Chumei