Source: [Jiaxing Daily - Jiaxing Online]
A launch vehicle, a logistics vehicle, a team of meteorological experts chased the clouds, and after nearly 10 hours of waiting, it finally brought an artificial rain to Hecheng .
"Three, two, one, launch!" At around 19:20 today, the cannons rumbling in Haihua Village, Dama Town, Tongxiang (operating point No. 8, Jiaxing) were rumbling. In order to alleviate meteorological drought and purify the air, the Jiaxing Meteorological Bureau seized the opportunity to launch 4 rockets here. Light rain fell around, which made the land of Jiahe, which has been "baked" for several days, have been drought and rain for a long time.
Today, Jiaxing people experienced the most "cooler" day in nearly 10 days: not only artificial rain increased, but also achieved some cooling. But unfortunately, tomorrow, with the strengthening of subtropical high pressure, Hecheng's high temperature will make a comeback.
Artificial rain increase is not "Rain as you wish"
Jiaxing last time artificial rain increase was in the autumn of 2017.
Since this summer, Hecheng has had abnormally high temperatures and continued to be less rainfall. "The city has generally experienced mild to moderate, local severe meteorological drought, and the ozone concentration remains high." said Chen Youping, senior engineer of meteorological service center, .
In order to alleviate drought and improve air quality, the artificial rain increase that everyone has been looking forward to is scheduled tonight!
It is understood that the operation location was approved by the airspace control department as Haihua Village (Jiaxing No. 8 Operation Point); the effective range is an administrative area centered on the operation point and within a radius of 10 kilometers; the operation equipment is 4 BL-1A artificial rain-enhancing rockets.
Some people may have questions, why did it rain just the day before, and we still need artificial rain increase? After experiencing so long sunny, hot and high temperatures, why didn’t artificial rain increase?
Simply put, artificial rain increase must meet both weather conditions and airspace conditions.
Meteorological experts gave a more professional explanation: artificial rain increase is actually to use rockets or aircraft and other tools to sow condensed nucleus or artificial ice nucleus into clouds that meet certain conditions in the air, promoting the rapid growth of small cloud droplets into raindrops, or the small ice crystals grow as soon as possible and then fall and melt into raindrops, landing on the ground.
Artificial rain increase is not to create rain out of thin air, but clouds in the sky that should be suitable for operations. For example, under the control of the powerful subtropical high pressure some time ago, even if there are clouds, it is often a thin layer high above or occasionally a few light cumulus clouds like cotton candy floating by. Such clouds cannot meet the requirements of artificial rain increase operations.
"Artificial rain increase can only guide the clouds to produce precipitation as soon as possible and produce more precipitation, but 'a skillful woman cannot cook without rice'. Without suitable clouds, the operation cannot be achieved." Chen Youping said.
So, what kind of cloud is suitable for artificial rain increase?
According to meteorological experts, at least 4 conditions must be met: the cloud thickness in the operation area must be at least 2-3km, the cloud bottom height is below 2km, the cloud area reaches dozens of square kilometers, and the cloud has a certain upward airflow. Clouds that are too thin and too small can hardly provide enough small cloud drops . If the cloud bottom is too high, it will cause raindrops to evaporate in the air before they land on the ground. Therefore, artificial rain increases are not "smooth as you wish".
Seeing this, someone may ask again, there is no Jiaxing main urban area on the list of artificial rain-increasing operations. Why is this?
Artificial rain increase also pays attention to the right time, place and people. "In addition to weather conditions, certain ground conditions must be met. Jiaxing city is densely populated and there are airports. Because artificial rain increase requires catalytic rockets to the target cloud, which will affect the flight of the aircraft. In addition, the operation rockets are descended through parachutes. Considering the large population density, in order to prevent safety accidents, no operation points are set up here." Chen Youping said.
Netizens "Round of fate" photographed
The high temperature is still firm
00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
Under the dual effects of rainfall and cold air, the wind this morning was still a little cool. The minimum temperature in the morning started from 24.4℃, but with the help of sunlight during the day, the maximum temperature rose to 35.5℃. The Jiaxing Meteorological Observatory issued a high temperature report.
Tomorrow, the subtropical high pressure will increase again, and the heat wave in Jiaxing will counterattack. In the future, high temperatures will remain the "C position". The hot weather at 39℃~40℃ is eyeing you, so you must not take it lightly.
Just today, National Climate Center confirmed a message: the current high temperature event has reached the strongest since my country has a complete meteorological record!
After monitoring and evaluation by the center, taking into account the average intensity, impact range and duration of high-temperature heat wave events, the comprehensive intensity of regional high-temperature events since June 13 this year has reached the strongest since the complete meteorological observation record in 1961.
This high-temperature heat wave process has the characteristics of long duration, wide range, large intensity and strong extremeness. As of August 15, the incident has lasted for 64 days, the longest since 1961 (more than 62 days in 2013). Since the summer (June 1 to August 15), the average number of high temperature days nationwide has been 12.0 days, 5.1 days more than the same period in the previous year, the most in the same period since the complete meteorological observation records in 1961.
Subtropical high pressure will also have a repetitive process of weakening and strengthening. The "long-term battle in midsummer" is still continuing. Please cheer up your energy and do a good job in preventing heatstroke and cooling, and spend the summer safely.
This article comes from [Jiaxing Daily-Jiaxing Online] and only represents the author's views. The national party media information public platform provides information release and dissemination services.
ID: jrtt
