【Daily Discussion】Water Resources and Hydropower Engineering-20200718

The strongest tropical cyclone that originates over the tropical oceans. The maximum wind speed near the center is level 12 or above. After making landfall, the typhoon gradually weakens and disappears.

The strongest tropical cyclone that originates over the tropical oceans. The maximum wind speed near the center is level 12 or above. After making landfall, the typhoon gradually weakens and disappears. Typhoons that affect the southeastern coastal regions of China are most frequent from July to September. Areas affected by typhoons often experience strong winds and heavy rain, with high tides and huge waves along the coast.

A low-pressure vortex that forms over tropical or subtropical oceans is a powerful and deep \"tropical weather system\". China classifies tropical cyclones in the South China Sea and the northwestern Pacific into 6 categories based on the maximum average wind force (wind speed) near their eye; those with a wind force of level 12 or above are collectively referred to as typhoons.

The strongest tropical cyclone that originates over the tropical oceans. The maximum wind speed near the center is level 12 or above. After making landfall, the typhoon gradually weakens and disappears.

A typhoon is actually a tropical cyclone. Typhoons and hurricanes are both types of tropical cyclones; they differ only in their location and the names used to refer to them. In the western North Pacific, west of the International Date Line, including the South China Sea and the East China Sea, it is called a typhoon ； Tropical cyclones in the Atlantic or the eastern North Pacific are called hurricanes; that is, they are referred to as hurricanes in the United States, while in the Philippines, China, and Japan they are called typhoons ； If it is in the Southern Hemisphere, it is called a cyclone. (1) Refers to tropical cyclones in the Asia-Pacific and Indian Ocean regions. Example: The “typhoon” described in Joseph Conrad’s novels. (2) A typhoon is a severe tropical cyclone that forms over tropical oceans. (3) It varies depending on the location, time, and name. Typhoons in recent years ①Tropical cyclones that occur in the Indian Ocean and in the western North Pacific, west of the International Date Line, including the South China Sea, are referred to as “typhoons”” ； For example, in East Asia and Southeast Asia, it is called a “typhoon”. ②Tropical cyclones in the Atlantic or the eastern North Pacific are called “hurricanes”. In other words, typhoons are called “hurricanes” in Europe and North America. ③In the Philippines, it is known as the “Baguio wind”. ④In the Bay of Bengal region, it is called a “cyclonic storm”. ⑤On the Indian Peninsula, it is called a “tropical cyclone”. ⑥In Australia, it is called “Wailai Wind”. ⑦In Mexico, it is called “whipping”. ⑧In the Southern Hemisphere, it is called a “cyclone”. (4) Typhoons are often accompanied by strong convective weather such as strong winds and heavy rain or extremely heavy rainfall. The wind direction rotates counterclockwise in the Northern Hemisphere (and clockwise in the Southern Hemisphere). On a weather map, the isobars and isotherms of a typhoon are approximately concentric circles. The eye of a typhoon is a low-pressure area characterized by vertical movement of air currents; the wind is calm and the weather is clear ； Near the eye of the typhoon lies a vortex of strong winds and heavy rain. The typhoon with the highest intensity ever recorded and the lowest pressure near its center was the super typhoon Tip; the severe floods that hit Japan in 1979 were caused by this typhoon. The cause of typhoons is high ground temperatures, which cause air currents to rise; seawater winds and water vapor do so due to their higher density. Ground air is replenished along the surface; the low temperature of the sea surface allows it to absorb the rising air and water vapor from the ground, thus filling the space. Due to the large area of the sea surface, the temperature difference is small. There is a large amount of water vapor accumulated over the sea surface, resulting in widespread rainfall. When this water vapor condenses, its volume decreases, and the surrounding water vapor moves in to fill the gap, thereby generating strong winds. Fold

The strongest tropical cyclones originate over the tropical oceans. The maximum wind speed near the center is level 12 or above. After making landfall, the typhoon gradually weakens and disappears. Typhoons that affect the southeastern coastal regions of China are most frequent from July to September. Areas affected by typhoons often experience strong winds and heavy rain, with high tides and huge waves along the coast.

A typhoon is actually a tropical cyclone. Typhoons and hurricanes are both types of tropical cyclones; they differ only in their location and the names used to refer to them. In the western North Pacific, west of the International Date Line, including the South China Sea and the East China Sea, it is called a typhoon ； Tropical cyclones in the Atlantic or the eastern North Pacific are called hurricanes; that is, they are referred to as hurricanes in the United States, while in the Philippines, China, and Japan they are called typhoons ； If it is in the Southern Hemisphere, it is called a cyclone

Typhoons are a category of tropical cyclones. In meteorology, according to the definition of the World Meteorological Organization, a tropical cyclone whose sustained wind speed at its center reaches level 12 (that is, 32.7 meters per second or more) is called a hurricane, or by a local synonym; the term hurricane is used in the North Atlantic and the eastern Pacific ； In the western North Pacific (north of the equator, west of the International Date Line, and east of 100 degrees east), the synonymous term used is typhoon.

The strongest tropical cyclone that originates over the tropical oceans. The maximum wind speed near the center is level 12 or above. After making landfall, the typhoon gradually weakens and disappears.

The strongest tropical cyclone that originates over the tropical oceans. The maximum wind speed near the center is level 12 or above. After making landfall, the typhoon gradually weakens and disappears. Typhoons that affect the southeastern coastal regions of China are most frequent from July to September. Areas affected by typhoons often experience strong winds and heavy rain, with high tides and huge waves along the coast.