China News Network, September 9 -- The China Meteorological Administration held a press conference in October 27 on the 27th, at which Jia Xiaolong, deputy director of the National Climate Center, introduced the national weather and climate characteristics in September and the climate prediction and service suggestions for October. Jia Xiaolong said that the overall temperature in the country in September was high, and there was more precipitation. As of September 2023, the national average temperature was 10.9°C, 10.9°C higher than the same period of the year, the highest since 9; the temperature in Liaoning, Jilin, Ningxia, Shandong, Gansu, Shanxi, Inner Mongolia and Yunnan was the highest in the same period of history. The maximum daily temperature of 26 national meteorological stations, including Yanling in Hunan and Hekou in Yunnan, has reached or exceeded the historical extreme value in autumn. The national average precipitation was 18.6 mm, 1% more than the same period of the year; Guangdong and Xinjiang had the highest precipitation in the same period of history, and Yunnan had the lowest precipitation in the same period in history. The daily precipitation of 3 national meteorological stations, including Fuzhou, Changle in Fujian and Panyu in Guangdong, exceeded historical extremes. The main weather and climate events in our country in September are as follows.
First, a total of 5 rainstorm processes occurred across the country, and the intensity of the heavy rainfall processes in Jiangnan and South China was particularly strong. Affected by Typhoon Sura from August 8 to September 31, Guangdong, Guangxi, Fujian and Taitung in Taiwan exceeded 9 mm; Affected by the "sea anemone" and the residual circulation, from September 3 to 300, parts of eastern Fujian, central and western Guangdong, southern Guangxi, Hong Kong and eastern Taiwan reached more than 9 mm. From September 3 to 13, the local area of Fuzhou, the Pearl River Delta and its west exceeded 400 mm, and the daily precipitation of eight national meteorological stations in Guangdong and Fujian reached or exceeded historical extremes.
Second, the number of typhoons generated is small, and the number of landfalls is close to the same period of the year. One typhoon was generated in the Northwest Pacific Ocean and the South China Sea, which was less than the same period of the year; Two typhoons made landfall in our country, close to the same period of the year. Typhoon Sura made landfall on the southern coast of Zhuhai City, Guangdong Province around 1:2 on September 9 (strong typhoon); From September 2 to 3, Typhoon Anemone made landfall three times along the coast of Taitung City, Taiwan Province (strong typhoon), Dongshan County, Fujian Province (tropical storm), and Raoping County, Guangdong Province (tropical storm). "Sura" and "Anemone" have successively affected South China, bringing great wind and rain to Taiwan, Fujian, Guangdong, Guangxi and other places, and waterlogging, landslides, road interruptions and other dangerous situations have occurred in Guangzhou, Shenzhen, Zhuhai, Dongguan, Zhaoqing, Foshan and other cities.
Third, the meteorological drought in the northwest region has eased, and the drought in Yungui has risen. In September, the precipitation in north-central Xinjiang, northern and eastern Qinghai, southern Gansu and northern Shaanxi was generally more than the usual in the same year, more than 9 times more in some parts of northern Xinjiang, the overall meteorological drought in northwest China eased, and moderate meteorological drought still existed in some parts of central Gansu and southern Ningxia. The precipitation in central and eastern Yunnan and southern Guizhou is 2% to 5% less, of which some areas in eastern Yunnan have less precipitation of more than 8%, the temperature is high, and the drought has risen.
Fourth, three strong convective weather processes occurred across the country, and Jiangsu was hit by strong tornadoes. On the 3th, a large range of thunderstorms and gales occurred in southeast Inner Mongolia, Liaoning, Jilin, Heilongjiang and other places, the strongest wind reached 18, and large hailstorms appeared in many places, with a maximum diameter of more than 11 mm; On the 40th, Hebei, Henan, Shandong, Anhui, Jiangsu, Hubei and other places experienced a wide range of short-term heavy precipitation, and accompanied by a wide range of thunderstorms and winds, Jiangsu Suqian and Yancheng were hit by tornadoes, and the relevant areas were seriously affected.
In September, a total of 9,2 early warning messages were issued nationwide, a year-on-year decrease of 3.4%. The warning information for heavy rain, flash flood disasters and thunderstorms and gales increased by 46.118%, 7.94% and 8.76% respectively year-on-year.
Jia Xiaolong said that according to the October climate trend forecast, there are three aspects of meteorological service tips.
The first is to prevent the adverse effects of cold air. The risk of periodic low temperature and frost disasters in northern Xinjiang, northeastern Inner Mongolia and northeast China is high. It is recommended that relevant departments strengthen field management in the late autumn harvest crop to prevent the adverse effects of frost on agricultural production; Facilities agricultural areas and northern pastoral areas to do a good job of wind protection and warmth; Departments such as transportation, energy and power should make low-temperature rain and snow disaster risk plans.
The second is to prevent the adverse effects caused by precipitation in the southwest region. The precipitation in the southern part of the southwest region is higher than that in the same period of the year, and the risk of local floods and geological disasters is higher. It is recommended that the southwest region strengthen the inspection and investigation of hidden danger points, and do a good job in the evacuation and transfer plan of key groups; Do a good job in field management in the late autumn harvest, pay attention to avoiding rain and rushing to harvest, beware of germination and mildew, and drain and scatter moisture in time; Relevant departments should strengthen preventive and response measures in engineering construction, transportation, power supply, communication guarantees, etc.
The third is to prevent meteorological drought in the eastern part of the northwest region and Inner Mongolia. Western Inner Mongolia, eastern Northwest China, northern Jiangsu, northeastern Anhui, southern and eastern Shandong have low precipitation and high temperature, and there is a risk of meteorological drought. It is recommended to strengthen the water storage and water preservation work of Tangba Reservoir, rationally carry out water source management and regulation, and ensure the water demand for autumn harvest and autumn planting. The forest and grassland fire risk level in the central and western parts of Inner Mongolia and the northern part of the northwest region is high, and it is necessary to strengthen the management of wildland fire, and do a good job in prevention, early warning and fire prevention.