Why floods occur in Australia in winter

It's because of the "El Niño" phenomenon. Why, it is not an isolated oceanic phenomenon, it is the product of the interaction between the tropical ocean and the atmosphere, and it is a purely natural phenomenon. To put it simply, El Niño will have an immeasurable effect on the atmosphere, leading to climate change

The Pacific Rim countries in the Central and Eastern Pacific and South America are unusually rainy, and even floods; Precipitation decreased in the tropical western Pacific Ocean, and severe droughts occurred in Indonesia and Australia. El Niño can also affect mid- and high-latitude regions outside the tropics, and even bring anomalies to the global climate.

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Based on what you described: The climatic characteristics of Australia's flood-affected areas depend largely on the geographical location and seasons of the area. In general, these areas are usually located in areas with high rainfall during the rainy season or winter.

In Australia, summers are typically hot and dry, while winters can experience heavy rainfall, which can lead to flooding. In addition, tropical climate zones in northern and eastern Australia are also vulnerable to heavy rainfall from tropical storms and typhoons, further increasing the risk of flooding. In addition to this, when meteorological systems such as El Niño occur, it can have a significant impact on Australia's climate.

El Niño causes temperatures to rise in the South Pacific, triggering large-scale climate anomalies such as droughts and floods. As a result, flood-affected areas in Australia may be at greater risk when El Niño or dust occurs.

The basic feature of El Niño is an abnormally high sea surface water temperature along the Pacific coast, a sea level**, and the formation of a warm current that flows southward. It has turned the waters of the eastern Pacific Ocean, which were previously cold waters, into warm waters, resulting in tsunamis and storms, resulting in drought in some areas and excessive rainfall in others.

In the event of an El Niño, Australia and Indonesia are vulnerable to drought, South America and Mexico are prone to flooding, and other parts of the world are also vulnerable to unusual weather hazards. Considering the timing of the outbreak, the weather in the United States is not expected to be too affected by El Niño, and Australia and South America may experience unusual weather during the planting period. However, Australia has had abundant rains in the past two years, and a mild drought may not have serious consequences, while heavy rains in South America have helped to boost crop prospects in some areas.

Indonesia is likely to experience unusually dry weather after the end of the rainy season.

First of all, the rainfall in eastern Australia is mainly due to the equatorial trade winds (southeast winds), which bring moist air from the sea. And El Niño caused a reversal of the direction of the wind (westerly), and the westerly wind was blowing from the Australian continent to the ocean, and the continent was dry, so what would rain.

In the event of a flood, we have to make a lot of preparations, such as choosing the best route to escape, preparing food and drinking water, preparing emergency floating items, ensuring that communication equipment can be used normally, and so on.

OneAustralia has encountered a major flood, the flood is caused by heavy rain, reservoir dam failure and other phenomena of water flow or water level sharply increased or ** phenomenon, if the flood exceeds a certain limit, it will bring serious losses to people's normal life and work, so what should we do in the event of a flood? Let's briefly share with you, first of all, before the flood comes, seize the time to make corresponding preparations, according to the flood information provided by local radio, television, etc., and combined with their own geographical location and natural conditions, quickly and calmly choose the best escape route, and must avoid the passive situation that people have not escaped from the flood.

IIRecognize the surrounding road signs, determine your destination and escape route, don't go on the wrong road because of panic, prepare enough instant food and drinking water when you are ready to escape, ensure that these food and water can sustain the needs of life for a few days, use the surrounding wood or wooden basins at home, large foam items, plastic objects, materials that can float on the water, urgently make life-saving equipment in case of emergency, put the valuables in the house into a waterproof bag, tie it firmly and put it in a high place or bury it in the groundSome small valuables can be placed in pockets and carried around. If the flood has arrived and you need to save yourself, you should first keep a cool head, quickly judge the flood and the surrounding environment, and immediately move to a higher place. In the process of emergency escape, do not run in the direction of the flood, be sure to quickly take shelter on both sides, do not risk wading across the river, and never climb power poles or live towers.

IIIIf in the process of escaping, accidentally swept away by the flood or fell into the water, do not panic, keep a cool head, quickly observe the surrounding environment, try to catch the planks floating around you, boxes and other floating objects, if you are far away from the shore, there are no pedestrians or boats around, you must not swim blindly, so as not to exhaust your physical strength and lead to greater danger, if the mobile phone can still be used, get in touch with the local ** as soon as possible, report your location and danger, and request **rescue, In the face of floods, we must not panic and be prepared accordingly.

I'm coming to you! There are three main reasons for the following acacia numbers:

1.The outline of the Australian continent is wide from east to west and narrow from north to south, the Tropic of Cancer passes through the central part of Australia, most of which is under the control of the subtropical high pressure (large area), the downdraft is dominant, except for the windward slope of the eastern mountains, the precipitation is scarce in the central part of the continent and the west coast of the desert area, forming a tropical desert climate.

2..The eastern mountains block the warm and humid air flow of the Pacific Ocean from going westward into Lingmingqi, which is also an important reason for the wide dry area in this region. In addition, 3...The cold snap of Australia, which flows through the west coast of the continent, plays a certain role in the formation of deserts on the west coast.

Seasonal movement of the barometric pressure zone and the wind band. In the summer of Australia, the equatorial depression shifted southward, causing rainfall and flooding in northern Australia. The subtropical high-pressure zone also moved southward, and in its southern Mediterranean climate zone, it happened to be hot and dry, and prone to fires.

Well, I can only forgive me for my knowledge of high school geography that I still remember so far.

Causes of fire: 1. The southern hemisphere is in summer, and the temperature is high, causing a fire eruption?

2. Australia has a tropical desert climate and a savannah climate, and the climate is dry.

3. Located in the volcanic belt of the Pacific Rim, well, there are many volcanoes, and then the high temperature leads to the eruption of **mountain.

4. The forest covers a large area, and it is difficult to extinguish the clouds once a fire breaks out.

5. The human factor, which seems to be the cause of arsonists.

Floods: 1. The flood-stricken areas seem to have a tropical rainforest or savannah climate, with high temperature and heavy rainfall in summer, and heavy precipitation.

2. Under the influence of the East Australian Warm Current and the South Equatorial Warm Current, there is abundant precipitation (of course, it is not a good thing, it is flooded).

3. Global warming, abnormal climate, and a lot of precipitation in Australia this year.

4. In addition, I don't know if there is a reason for soil erosion and the decline in the water storage capacity of the forest caused by artificial deforestation and destruction of vegetation, because I saw that there was a mudslide.

In recent days, Australia's east coast has been hit by continuous torrential rains, and flash floods caused by heavy rains have forced people to evacuate in many areas. Due to the accumulation of rain and the surge of river water, New South Wales, which concentrates Australia's 1 3 population, has issued evacuation orders for evacuation of people in 14 areas, which locals say is a once-in-a-century flood in Australia, and this extreme weather is likely to continue to rage. In recent years, flood disasters can be said to be prevalent in all countries of the world, causing serious disasters to human beings, so what kind of harm will floods cause to human beings?

Let's take a closer look.

The biggest harm to human beings caused by disease floods is that they can directly endanger people's lives and cause people. When a flash flood breaks out, the flood water may rush into the village, wash away the people and livestock in the village and drown, and some old houses that are not stable can also be directly washed away, and the people who do not come out of the house will be injured or lose their lives. Infectious diseases such as influenza, malaria and measles are also prone to occur in flooded areas, and the large-scale movement of people in the disaster areas will cause more epidemic diseases, thus posing a great threat to people.

The areas where the flood waters have been destroyed and caused damage to the environment and property and agriculture have often been in shambles, with many houses collapsed, cars blistered, and some houses that have not fallen down have become unstable because of the flooding, and some have been cracked and no longer inhabitable, all of which have caused great losses to the people in the affected areas. Especially for farmers, after the crops in the field are blistered, even if they are lucky enough not to die, the yield will be greatly reduced, and those who invest in planting and breeding will lose even more, if they raise fish in fish ponds, all the fish will run away with the flood, and there may not be even a single fry left. After the flood, there was also some damage to the local natural environment, many saplings did not grow well after being flooded, and many bridges and river embankments were washed away.

Affect transportation, damage to industries and cities Once the flood rises, local transportation will generally be interrupted immediately, because cars and trucks can not pass through the flood area, many railway lines, highway lines may be flooded, or buried by mudslides to block traffic, can only be sent by ships or ***. If there is a flood in the city, it will have a great impact on the lives and jobs of the people in the city, as well as on the local businesses, and this impact will be maintained until the flood waters recede.

Floods can have a big impact on our lives by destroying homes and crops, and we need to rebuild our homes after a flood, which is a catastrophic natural disaster.

The first is the harm to the economy, which will lead to the collapse of houses and buildings, causing tens of millions of yuan in losses; The second is environmental hazards, as flooding can cause habitat loss for many animals; The third is the danger to human life, which will lead to the outbreak of some plagues.

Australia's 100-year floods, when the water level reaches a high enough height to drown rents, damage infrastructure such as waterworks, electrical circuits, roads, etc., cause serious economic losses, and can also destroy farmland, causing mudslides and landslides.

Flooding, inundating farmland, houses and depressions, I think that's the biggest hazard! Secondly, it can also lead to the occurrence of infectious diseases, which can cause many deaths.