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 covers almost the whole province. From the morning of February 9th to the afternoon of February 9th, 2002 10, it began to rain in many places in Guangdong Province. This rainfall belongs to artificial precipitation enhancement. Artificial precipitation enhancement is not artificial precipitation enhancement, which uses airplanes and rockets to spread catalysts into the clouds to promote rainfall when the natural clouds have fallen or are close to falling.

From 8: 00 on February 8, 2002 1 year to 8: 30 on February1year, in Shaoguan, Qingyuan, Meizhou, Yunfu, Zhaoqing, Maoming, Zhanjiang, Yangjiang, Huizhou, Jiangmen and Heyuan 1 1 year. The aircraft operated three times, with a cumulative impact area of 88,300 square kilometers. In fact, in the absence of artificial precipitation enhancement, due to the eastward movement of the upper trough and the low-level southeast jet, there will also be rain in Guangdong. But considering the current drought in Guangdong and the intensity of this rainfall. All parts of Guangdong Province seized this opportunity to carry out large-scale artificial precipitation enhancement to alleviate the current drought.

However, as a southern coastal city, Guangdong should have abundant rainfall. Why is there a drought?

Investigate the reason.

There are some anomalies in the atmospheric circulation of 1 this year. In June10-June 1 10, the cold air force was weak, and the tropical negative high pressure controlled Guangdong for a long time, with less precipitation.

The rapid development of urbanization, high-density urban construction and high-concentration carbon dioxide.

Guangdong has high vegetation density and high meteorological grade of forest fire risk.

Therefore, in the face of such a drought, Guangdong Province quickly made a decision. Guangdong launches in 2 days 187 pieces? Rocket? Increase rainfall to alleviate the drought. According to the forecast of Guangdong Meteorological Observatory, the rain area will slowly move eastward, the precipitation in western Guangdong will gradually gather in the afternoon of 10, and the precipitation in eastern Guangdong will appear in the afternoon. From 1 1 in the morning, as the upper trough moved eastward and northward, the rain in the whole province gradually stopped turning cloudy, and this round of precipitation tended to end; During the Spring Festival, the weather is very good.