Compare the main characteristics of typhoons and cold waves, hazards and preventive measures 15

There are four basic conditions for typhoon formation.

Here I will first give the definition of a typhoon: a typhoon is a strong tropical cyclone with a warm structure that occurs on the surface of a tropical ocean and can bring disastrous weather.

1.Suitable sea surface temperature. The surface temperature of the sea water is 26-28 degrees Celsius, which is suitable for the development of typhoon warm core structures. This is the primary condition for the formation of typhoons. This temperature provides enough energy for a typhoon.

2.Initial perturbation. It's like a spring oscillator, it won't vibrate without giving it a perturbation.

3.A certain geostrophic deflection force. Geostrophic deflection forces cause disturbances to develop into cyclonic rotation, which is a necessary condition for the formation of typhoons. At the equator, the geostrophic deflection force is zero, and the disturbance cannot develop into rotation, so there is no typhoon formation.

4.The vertical shear of the wind is smaller. In the vertical direction, the wind speed should be comparable, and when there is a large difference between the upper and lower wind speeds, the heat in the lower layer will be blown away by the wind in the upper layer as soon as it gathers, which is not conducive to the formation of warm hearts and the accumulation of typhoon energy.

This is based on what I have learned, and it should be about the same for the exam. Hey hey

Summary. Kiss <>

I'm glad to answer for you, try to start with the seasonal differences between typhoons and cold waves affecting our country: typhoons and cold waves are typical meteorological disasters in summer and winter in China, respectively. <>

<> summer is the typhoon-prone season, usually starting in June and ending in November. At this time, China's southeast coastal areas and the South China Sea are susceptible to typhoons, and the storms and waves brought by typhoons often lead to disasters such as floods, wind disasters and shipping accidents. In order to reduce the damage caused by typhoons, ** and all sectors of society usually respond to the threat of typhoons by strengthening early warning and prevention measures, as well as formulating emergency plans.

<> try to see the seasonal differences in typhoons and cold waves affecting our country.

Kiss [Guanzi Hope] <>

I am glad to answer for you, try to start from the seasonal differences between typhoons and cold waves affecting our country: typhoons and cold waves are typical meteorological disasters in summer and winter in our country, respectively. <>

<> summer is the typhoon-prone season, usually starting in June and ending in November. At this time, China's southeast coastal areas and the South China Sea are susceptible to typhoons, and the storms and waves brought by Nianliangzheng Typhoon often lead to disasters such as floods, wind disasters and shipping accidents. In order to reduce the damage caused by typhoons, ** and all sectors of society usually respond to the threat of typhoons by strengthening early warning and prevention measures, as well as formulating emergency plans.

Kiss <>

Related expansion: Winter is the season of frequent cold waves, generally starting from November to ending in March of the following year. At this time, the northern region of China and part of the central part of Zhaojing are susceptible to the impact of the cold wave, and the temperature plummets, accompanied by strong winds and snowfall, which has a great impact on people's production and life.

In order to cope with the impact of the cold wave, all walks of life usually take measures such as keeping warm and cold, fire safety, and doing emergency rescue work. <>

Why does the cold wave have a large impact on China and the typhoon has a small impact on China?

Hello! The extent of cold waves and typhoons in China is related to their formation and propagation mechanisms. The cold wave refers to the strong cold air mass formed by the southward movement of the polar air and the warm and humid airflow, and its influence range is mainly in the northern region of Xunnai, because the winter temperature in the northern region is already low, and the terrain is relatively flat.

Typhoon refers to a tropical cyclone, which is formed in the tropical ocean and strengthens with the increase of ocean water temperature, but is affected by various factors such as topography and air pressure, and its path and impact range are relatively uncertain, but in general, its influence range is mainly in the southern coastal areas. Therefore, the impact range of cold waves and typhoons on China is determined by their formation and propagation mechanisms.

Typhoon Storm Surge: Storm surge occurs in summer and autumn. When a typhoon moves from the open sea to the near shore, the shore tide gauge station first observes that the rise of the sea level is slow, generally only 20 cm to 30 cm, and the duration is usually more than ten hours.

This is a harbinger of the approaching storm surge of a typhoon, and then, as the typhoon gradually moves closer, the storm surge level rises sharply and reaches its maximum before and after the typhoon passes.

The typhoon wind direction rotates in a counterclockwise direction, as shown in the figure below, as it gradually approaches the shore, the strong winds in the right semicircle of the typhoon center (commonly known as onshore winds) continuously blow the sea water towards the shore and accumulate on the shore, causing the sea level to rise rapidly, thus causing a storm surge, which reaches its maximum in the hours before and after the typhoon landfalls, and the storm surge is also highest at this time. Therefore, the maximum storm surge tends to occur on the shore to the right of the typhoon's moving direction, while the storm surge on the left shore is usually smaller than on the right shore.

The right semicircle referred to here is the right side relative to the direction of the typhoon, and most of the typhoons that hit the coast of our province move from the southeast to the northwest, and some of them move from the southwest to the northeast.