The Paper reporter Diao Fanchao
html At 2 pm on September 2, the center of this year’s No. 11 typhoon "Xuanlannuo" was located in the ocean east of Taiwan, about 405 kilometers east of Taitung City, Taiwan Province. The maximum wind force near the center was level 14 (45 meters/second), the level is strong typhoon level.
The Central Meteorological Observatory predicts that "Xuanlannuo" will turn to the north-west direction starting from September 3, and move into the East China Sea on the night of the 3rd. Its intensity will develop again, and it may develop into a super typhoon level again, and gradually It is close to the coastal area in northeastern Zhejiang. From the night of the 4th to the morning of the 5th, it will turn to the northeast and move northeastward on the sea surface off the coast of Zhejiang, heading towards the coast from the southern part of the Korean Peninsula to Japan’s Honshu Island.
"Xuanlannuo" is large in scale,
long-lasting and strong
html On September 2, Zhou Guanbo, chief forecaster of the Typhoon and Marine Meteorological Forecast Center of the Central Meteorological Observatory, analyzed in an interview with the media that typhoon "Xuanlannuo" was large in scale and strong. It will last for a long time and have strong intensity, which will have a strong impact on our country."After 'Xuanlannuo' was formed, it annexed a tropical low pressure to its south, making it even larger. At the same time, due to the control of the subtropical high pressure, the early high temperature weather caused high sea temperatures, which caused 'Xuanlannuo' to ' replenishes energy and keeps it within 24 hours (8 From 2:00 on the 29th to 2:00 on the 30th), it was upgraded to three levels in a row, from a severe tropical storm level 6 to a super typhoon level. "Zhou Guanbo pointed out that on the satellite cloud map, "Xuanlannuo" has a "double-eye wall". "The structure is clearly visible, and this structure is only found in a few extremely strong Typhoon .
Zhou Guanbo said that at present, the possibility of "Xuanlannuo" landing on the eastern coast of my country cannot be ruled out. But even if it does not make landfall, "Xuanlannuo" will have wind and rain impacts on my country's coastal areas due to its wide range, large scale, long duration, and strong intensity.
Affected by "Xuanlannuo", from 14:00 on September 2 to 14:00 on September 3, the Bashi Strait , Taiwan Strait , the ocean east of Taiwan, the southern Yellow Sea, most of the East China Sea and the waters near Diaoyu Islands , the Yangtze River Kou District, Hangzhou Bay, and Taiwan Island There will be strong winds of magnitude 6-8 and gusts of magnitude 9-10 along the northern and eastern coasts of , the coasts of central and northern Fujian, the coasts of Zhejiang, the coasts of Shanghai and the southern coasts of Jiangsu; from 14:00 on September 2 to 14:00 on September 3, eastern Zhejiang and Taiwan There will be moderate to heavy rains in some areas in the northern part of the island, including heavy rains in northeastern Zhejiang and heavy rains in northern Taiwan.
Global warming and La Niña phenomenon
are the driving forces behind the strange path of "Xuanlannuo"
According to Zhou Guanbo, typhoon "Xuanlannuo" was generated at a higher latitude and "walked out" a unique path that has appeared for the first time in meteorological records. . Generally, typhoons are generated in the sea area between 5° and 20° north and south latitude, but the "Xuanlannuo" generating area is at 25.9° north latitude, which is relatively rare. Due to the influence of the subtropical high pressure, "Xuanlannuo" moved southwestward after its formation, where the water temperature was higher, causing "Xuanlannuo" to strengthen to the super typhoon level.
At present, "Xuanlannuo" is in a saddle-shaped pressure field, and the guided airflow is weak, so it keeps spinning in place. After the sea water turns up, the level of the typhoon is reduced. It is expected that on the 3rd, under the influence of the eastern subtropical high pressure and the deepening of the westerly trough , "Xuanlannuo" will turn to the north-west direction and enter the warm water area of the East China Sea, and may develop into a super typhoon again. Why is the
"Xuan Lannuo" path so unique? Zhou Guanbo said that typhoons reaching super typhoon level in the East China Sea are very rare, and global warming and the La Niña phenomenon are the driving forces behind what makes "Xuanlannuo" so special.
Zhou Guanbo reminded that the government and relevant departments should carry out typhoon emergency response work in accordance with their duties. Water operations in relevant waters and passing ships should return to the port to take shelter, strengthen port facilities, and prevent ships from anchoring, stranding and collisions.
Editor of this issue Zou Shan
