Guangdong forest fire warning covers almost the whole province. Why is it so dry and rainy here?
Recently, due to the dry and little rain in Guangdong, the forest fire warning almost covered the whole province. From the morning of February 9, 221 to the afternoon of February 1, 221, it began to rain in many places in Guangdong Province. This rainfall belongs to artificial precipitation enhancement. Artificial precipitation enhancement means that under the condition that the natural clouds have already fallen or are close to falling, airplanes and rockets are used to spread catalysts to the clouds to promote rainfall, which is not artificial precipitation.
from 8: on February 8 to 8: 3 on February 1, 221, 43 artificial precipitation enhancement operations were carried out at 32 operating points in 11 cities including Shaoguan, Qingyuan, Meizhou, Yunfu, Zhaoqing, Maoming, Zhanjiang, Yangjiang, Huizhou, Jiangmen and Heyuan, and 187 rockets were fired. The aircraft operated three times, with a cumulative impact area of 88,3 square kilometers. In fact, in the absence of artificial precipitation enhancement, Guangdong will also have rainfall due to the eastward movement of the upper trough and the low-level southeast jet. However, considering the current drought situation in Guangdong and the intensity of this rainfall. All parts of Guangdong Province seized this opportunity and carried out large-scale artificial rainfall increase to alleviate the current drought situation.
However, Guangdong, as a coastal city in the south, should have abundant rainfall, so why is there a drought?
The reason
1 The atmospheric circulation is somewhat abnormal this year. From October to November, the cold air force is weak, and the negative tropical high has controlled Guangdong for a long time, so the precipitation is less.
2 rapid urbanization, high density of urban construction and high carbon dioxide concentration
3 Guangdong has high vegetation density and high meteorological grade of forest fire.
Therefore, in the face of such a drought, Guangdong Province made a quick decision. Guangdong launched 187 pieces in 2 days? Rockets? Increase rainfall to alleviate drought. According to the forecast of Guangdong Meteorological Observatory, the rain area will slowly move eastward. On the afternoon of the 1th, the precipitation in western Guangdong gradually collected, and the precipitation in eastern Guangdong appeared in the afternoon. From the morning of the 11th, as the high-altitude trough moved eastward and northward, the rain in the whole province gradually stopped and turned cloudy, and this round of precipitation tended to end. During the Spring Festival, the weather is good.