The first super typhoon during the year!Why is "Xuan Lan Nuo" so strong?

Typhoon "Xuan Lannuo" this year was strengthened to a super typhoon level on the morning of the 4th, and then continued to go north. Affected by it, the rainfall in some areas of the Northeast today (6th) strengthened.

On September 4th, due to the influence of Typhoon No. 11 "Xuan Lannuo", the Golden Beach Sea of ​​Shitang Town, Wenling City, Zhejiang Province set off more than ten meters high. Photo by Xu Weijie (Visual)

Why can "Xuanlan Nuo" be the first super typhoon in the year? The trajectory is unusual, what is the reason? What should we pay attention to when the typhoon comes? Look at this issue of Questions and Answers ↓↓↓

Question: Why can "Xuan Lannuo" be the first super typhoon in the year?

Answer: Usually, we call the typhoon generated from June to August as "Typhoon Summer", and the typhoon generated from September to November is called "autumn typhoon", and the autumn typhoon is more likely to produce "ruthless characters". From 1949 to 2020, the typhoon generated in autumn accounted for 27.9 %, which was far higher than 18 % in summer.

At present, the typhoon of "Xuan Lannuo" was generally weak and the duration was short. This year's typhoon is not easy to generate, and it is not easy to strengthen after generation. This is related to the source of the typhoon -the generation of typhoons is either west or north. Cold water areas or log in to Japan.

Why is "Xuan Lannuo" so strong? This is because although it generates north, it has maintained the environment for more than 8 days due to the effect of the environment on the warm and humid sea, so it has enough time to enhance the intensity of super typhoons.

Question: The trajectory of "Xuan Lannuo" is unusual, what is the reason?

Answer: The trajectory of "Xuan Lannuo" is penetrated, and a "V -shaped" path is out of the sea, which is closely related to the shape and change of the subtropical high -pressure guidance of the typhoon mobile.

Although the probability of landing from "Xuanlan Nuo" is relatively low, its volume and high strength are high. Even if they are not logged in, they will affect the surrounding two hundred kilometers or even larger areas. The rainfall in some areas in the northeast of my country has increased, local or current rainstorm, and we need to pay attention to prevention.

Question: Typhoon comes, what should we do?

Answer: Pay attention to the weather forecast in time to understand the latest trends of typhoons; second, we must reserve food and water, prepare mobile power, flashlight, etc.; Third, close the doors and windows, turn off electronic equipment, and do not go to the open -air tourist area; fourth to obey the local flood control department s arrangement.

Source / Economic Daily WeChat (Reporter / Kang Qiongyan Planning / Liu Li)

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