What is a typhoon and what is a tsunami? What is the difference?

In the tropical ocean, the sea surface is exposed to direct sunlight, which makes the temperature of seawater rise, and the seawater is easy to evaporate into water vapor and spread in the air. Therefore, the air in the tropical ocean has high temperature and high humidity. This kind of air expands due to high temperature, reducing its density and weight, while the wind near the equator is weak, easy to rise, and convection occurs. At the same time, the surrounding cold air flows in to replenish and then rises again. This constant circulation will eventually make the whole gas column hotter and lighter. In the tropical ocean, the sea surface is exposed to direct sunlight, which makes the temperature of seawater rise, and the seawater is easy to evaporate into water vapor and spread in the air. Therefore, the air in the tropical ocean has high temperature and high humidity. This kind of air expands due to high temperature, reducing its density and weight, while the wind near the equator is weak, easy to rise, and convection occurs. At the same time, the surrounding cold air flows in to replenish and then rises again. This constant circulation will eventually make the whole gas column hotter and lighter. However, air flows from high pressure to low pressure just as water flows from high pressure to low pressure. Air with high ambient pressure will flow to low pressure, thus forming "wind". However, air flows from high pressure to low pressure just as water flows from high pressure to low pressure. Air with high ambient pressure will flow to low pressure, thus forming "wind". In summer, due to the direct sunlight moving from the equator to the north, the southeast trade winds in the southern hemisphere cross the equator and become southwest monsoon to invade the northern hemisphere. When they meet the northeast trade wind in the northern hemisphere, the air is forced to rise, thus increasing the convection. Due to the different directions of southwest monsoon and northeast trade wind, when they meet, they often cause fluctuations and vortices. In summer, due to the direct sunlight moving from the equator to the north, the southeast trade winds in the southern hemisphere cross the equator and become southwest monsoon to invade the northern hemisphere. When they meet the northeast trade wind in the northern hemisphere, the air is forced to rise, thus increasing the convection. Due to the different directions of southwest monsoon and northeast trade wind, when they meet, they often cause fluctuations and vortices. The convergence caused by the southwest monsoon and the northeast trade wind and the continuation of the original convection make the vortex with low pressure continue to deepen, that is, the air around it accelerates to flow to the center of the vortex, and the faster the flow, the greater the wind speed; When the maximum wind speed near the ground reaches or exceeds17.2m per second, we call it a typhoon. The convergence caused by the southwest monsoon and the northeast trade wind and the continuation of the original convection make the vortex with low pressure continue to deepen, that is, the air around it accelerates to flow to the center of the vortex, and the faster the flow, the greater the wind speed; When the maximum wind speed near the ground reaches or exceeds17.2m per second, we call it a typhoon. That is to say, a large number of airflow rises, and cyclone is generated due to geostrophic bias, and large airflow flows into vortex flow. A typhoon on a large scale and a tornado on a small scale. Note that typhoons do not necessarily exist only in summer. As long as there are conditions, it is called a typhoon. Pumbaa's answer adoption rate: 35.6% 2009-06-06 23:4 1. The tropical ocean is the hometown of typhoons. There are two main conditions for the formation of typhoons: first, the ocean temperature is relatively high; The second is rich water vapor. In the sea area with high temperature, some disturbances occurred in the atmosphere, and a large amount of air began to rise, which reduced the ground pressure. At this time, the peripheral air in the rising sea area keeps flowing into the rising area, and the flowing air rotates like a wheel due to the rotation of the earth. The rising air expands and cools, and the water vapor in it cools and condenses into water droplets, releasing heat, which in turn promotes the rise of low-level air, makes the ground pressure drop lower, and the air rotates more violently, thus forming a typhoon. Typhoons only occur in tropical oceans. The sea surface temperature there is very high, so that the lower air can fully accept the water from the sea surface. It is also the place with the richest water vapor on the earth, which is the main driving force for the formation and development of typhoons. Without this motivation, the typhoon will dissipate even if it is formed. Secondly, there is a certain distance from the equator, and the deflection force generated by the earth's rotation plays a certain role, which is conducive to the development of cyclone circulation and the strengthening of airflow convergence. Third, the tropical sea surface is simpler than the mid-latitude sea surface. Therefore, the air over the same sea area can often remain stable for a long time, so that typhoons have enough time to accumulate energy and brew wind. Under this condition, as long as there is a suitable trigger mechanism, typhoons will form and strengthen in some tropical waters, for example, the divergent airflow in the upper air or the trade winds in the northern and southern hemispheres meet slightly north of the equator. According to statistics, in tropical oceans, typhoons often occur in areas where the sea surface temperature exceeds 26-27℃. The oceans that produce typhoons are mainly the ocean east of the Philippines, the South China Sea, the West Indies and the east coast of Australia. The seawater temperature in these places is relatively high, and it is also the place where the trade winds in the northern and southern hemispheres meet ~ h ~ Answer adoption rate: 23.2% 2009-06-06 23:4 1 Anonymous answer to report the formation of airflow rotation: 20.0% 2009-06-07 00: 12 Simple report adoption rate. It's the pressure difference that plays a role. The answer adoption rate of Ile is:11.3% 2009-06-07 00:14. Traditionally, tropical cyclones have different names in different areas. People call the tropical cyclones along the northwest Pacific coast (such as the southeast coast of China, South Korea, southern Japan, Taiwan Province Province of China, Viet Nam and the Philippines) and their adjacent ocean surfaces "typhoons", while the tropical cyclones along the Atlantic coast and the northeast Pacific coast and their adjacent ocean surfaces are called tropical depression, tropical storm or hurricane respectively according to their intensity.