Why do many typhoons revolve around Qingdao?

1In August, 985, a typhoon landed in Qingdao, which brought great disaster to Qingdao and killed 29 people. Before another typhoon landed in Qingdao, it was August of 1939. This typhoon is the strongest typhoon in Qingdao history. Surprisingly, although there are typhoons affecting Qingdao almost every year, there are almost no typhoons landing from Qingdao. Strong typhoons landing in other places, even if they rush to Qingdao, will weaken a lot here, leaving only a little wind and rain.

We all know that typhoon is a meteorological term and belongs to a low-pressure cyclone weather system. It is the classification of tropical cyclones in Asia-Pacific countries or regions (East Asia and Southeast Asia west of international date line, etc.). ). Its central sustained wind speed reaches 12, which is equivalent to 32.7m per second or118km per hour. The "brother" hurricane of typhoon refers to a tropical cyclone generated and developed in the eastern North Pacific or the Atlantic Ocean. Typhoons are the most active in late summer and early autumn, and it is common for two or even three eddies to dance together.

Generally speaking, typhoons are mainly produced on the vast ocean surface at low latitudes north of the equator. Because the seawater temperature in this area is relatively high, and the evaporation of water vapor is much more intense, one or more low-pressure centers are formed, and under the joint action of horizontal pressure gradient force, geostrophic deflection force and friction force, an air vortex rotating counterclockwise is formed. As long as the water vapor and temperature do not decrease, it will gradually develop into a typhoon, or even a super typhoon.

The typhoon around Qingdao is actually not a blessing, but a curse! The advantages of typhoon outweigh the disadvantages. The most important impact of typhoon on a place's long-term ecological environment is precipitation. Places lacking typhoon patronage are generally dry. For example, although Qingdao and Shandong Peninsula are coastal areas, they are long-term drought-resistant areas, with an annual rainfall of only about 600 mm, far lower than the southeast coast south of the peninsula and the cold areas east of the peninsula. The disaster caused by typhoon is short-term, but the "good weather" characterized by little rain and calm in Qingdao and Shandong Peninsula is actually a chronic drought and a chronic ecological disaster.