What does La Ni a mean? What is the impact on our country in 2020?

In 2020, it was colder than usual, and the temperature began to drop to about 10 degrees Celsius during the National Day, and it even snowed in some areas in the north. There are rumors on the Internet that there will be the coldest winter in 60 years, and among the many messages, many people have mentioned the "La Niña effect". What does La Niña mean?

What will be the impact on our country in 2020? <

1. What does La Niña mean?

La Niña is a condition in which the waters of the central and eastern Pacific Ocean become abnormally cold. La Niña is the opposite of El Niño, also known as an "anti-El Niño" or "cold event", which refers to an abnormal drop in water temperature in the eastern Pacific Ocean near the equator, which is manifested by a significant cooling of the eastern Pacific Ocean, accompanied by global climate chaos, which always follows the El Niño phenomenon.

When the La Niña phenomenon occurs, China is prone to cold winters and hot summers, and the number of tropical cyclones that make landfall in China is higher than normal"Drought in the south and flooding in the north"Phenomenon; Indonesia, eastern Australia, northeastern Brazil and other places have more rainfall; The equatorial regions of Africa and the southeastern United States are prone to drought. <>

2. What impact will La Niña have on our country in 2020?

1.Effect 1: Low temperatures.

This year's La Niña will obviously not be as violent as it was in 2008, but it will also have some climate impacts, with experts leading to lower than usual rainfall in southern Africa and central North America, and heavier-than-usual rainfall in parts of South Asia, Southeast Asia and Australia.

2.Impact 2: Typhoons are increasing.

For China, in addition to the lower temperatures, the most obvious impact may be that the number of typhoons will increase, but the chance of a "cold winter" is still relatively small.

Due to the influence of the La Niña effect, atmospheric flow is more frequent, and the probability of a significant cooling in the northeast is still relatively large. However, the impact of La Niña is different each time, so it is not completely certain that it will be a "cold winter", and a further comprehensive determination is needed. <>

3. How does agriculture deal with La Niña?

1.Cover the film.

The greenhouse should be covered with grass in winter, in order to prevent rain and snow from wetting the grass, you can cover it with a layer of film.

2.Dig a ditch to protect against the cold.

Dig 40-50 cm deep into the cold-proof ditch and fill it with weeds, horse manure and other insulation materials to ensure the temperature in the shed.

3.Thermal insulation measures.

For example, heaters, heating blocks, etc., in the case of extremely low temperatures, timely ignition of the warming block can increase the temperature in the shed, especially in winter when the temperature is low at night, and the temperature in the shed can be appropriately increased.

Although the La Niña effect may bring strong cooling, as long as we take adequate precautions, then we can minimize the losses and even be able to overwinter and harvest normally regardless of the weather.

What is La Niña, and what impact will its appearance have on the planet?

<>What is La Niña? It refers to the phenomenon of the central and eastern Pacific Ocean cooling and very abnormal. However, La Niña means "la ni a" in Spanish, which means "little girl, holy woman", and is the inverse of El Niño in nature, also known as "anti-El Niño" or "cold event".

So what are the global implications of La Niña? The first is global climate chaos. Because La Niña mainly refers to the cooling of the Pacific Ocean, the occurrence of La Niña often brings global climate chaos.

As a result, the world's climate has become particularly unbalanced, which has uncontrollable impacts on people's lives.

Moreover, whenever the La Niña phenomenon occurs, there are often cold winters and hot summers in our country, and the most important thing is that the number of tropical cyclones coming to our country is much higher than in previous years"Drought in the south and flooding in the north"The phenomenon has caused particularly great harm to people's crops, and finally affected the food income of the whole country, and the harm is too great and the scope of the harm is particularly wide.

There are early signs of La Niña, such as hurricanes, torrential rains and severe cold, and the La Niña phenomenon lasts for a very long time, often as long as 2-3 months, because La Niña is a natural phenomenon, so people can only prevent and control it, and cannot change it, but can only try their best to protect the safety of economic property. The most important thing is that La Niña does not follow a cycle and is irregular, because La Niña and El Niño are sequential, so generally speaking, after the occurrence of El Niño, the next year will be monitored.

The impact of global climate chaos brought about by La Niña can only be said to be a natural disaster, so because of the "drought in the south and flooding in the north", the global economy will be hit hard.

La Niña refers to the widespread and unusually abnormal cooling of the eastern and central Pacific Ocean near the equator, accompanied by global climate chaos, with hurricanes, torrential rains and severe cold; It will have these effects on the world:1caused global climate anomalies, with the southwestern United States and the west coast of South America becoming unusually dry; 2.

It will make the hot areas hotter, the cold areas colder, and the humid ones more humid.

La Niña is an extreme climate anomaly that alters global atmospheric circulation and ocean currents, resulting in unusually high temperatures in some areas and unusually cold in others, as well as uneven distribution of precipitation.

La Niña refers to the strange phenomenon of cooling of the waters in the central and eastern Pacific Ocean, which may destabilize global climate change and bring great climate impacts.

La Niña refers to the persistence of abnormally cold sea surface temperatures in the eastern and central equatorial Pacific Ocean (as opposed to El Niño) and is the result of a combination of tropical oceans and atmosphere. It is the inverse of El Niño, also known as an "anti-El Niño" or "cold event", which refers to an abnormal drop in water temperature in the eastern Pacific Ocean near the equator, which is manifested by a marked cooling of the eastern Pacific Ocean accompanied by global climate chaos. It has an impact on most parts of China, especially in South China, and the impact is quite large.

2021-2022 is the year of La Niña.

Because 2021 is a double La Niña year, there was a La Niña event in the first half of the year, that is, in the autumn and winter of 2020-2021, and in October 2021, it entered a La Niña state and formed a weak to moderate La Niña event in winter.

The winter of 2021-2022 is expected to be a cold winter, mainly because this year or "La Niña year", the so-called Laki hail difference Niña year means that the probability of cold in the south will be higher than that in the north, so it will be very prone to extreme cold.

What you need to know about La Niña:

La Niña is a condition in which the waters of the central and eastern Pacific Ocean become abnormally cold. The southeast trade winds blow the sun-scorched sea water to the western part of the Pacific Ocean, causing the sea level in the west to rise by nearly 60 centimeters compared with the eastern one, and the sea temperature in the west increases, the air pressure drops, and the moist air accumulates to form typhoons and tropical storms, and the bottom sea water in the east rises, causing the sea water in the eastern Pacific Ocean to become colder.

Since 1950, there have been 16 La Niña events around the world. According to the intensity level, it is divided into weak, medium intensity, and strong events. There has only been one incident in history, which lasted from May 1988 to May of the following year.

La Niña refers to the phenomenon of persistently unusually cold sea surface temperatures in the eastern and central equatorial Pacific Ocean (as opposed to El Niño), and is a new term used in meteorological and oceanographic circles"Little girl", just with the meaning"Holy Child"The El Niño, on the contrary, is also called"Anti-El Niño"or"Cold events"。The occurrence of La Niña will cause a 91% chance of a cold winter in the Northern Hemisphere in the winter of 2022.

La NiñaWhen it appears, our country is prone to cold winters and hot summers, and it lands in our countryTropical cyclonesThe number of them is higher than usual, and there is a phenomenon of drought in the south and flooding in the north.

La Niña has an impact on the summer temperature in the northeast of our country. Temperatures tend to be on the high side, while in El Niño years, summer temperatures tend to be on the lower side. Northeast China is one of the main grain producing areas in China, and temperature changes have a certain impact on grain production.

La Niña also has an impact on the precipitation in the flood season in North China, during which the precipitation in the flood season in North China.

The position of the subtropical high in La Niña years is northerly, which is conducive to the formation of a rainy atmospheric circulation situation in North China during the flood season.

In most La Niña events.

In the summer of the following year, the East Asian summer monsoon is likely to be stronger, and the western Pacific subtropical high is prone to the north, and the northern part of China.

There is a high probability of heavy precipitation.

The magnitude of the La Niña event.

The extent, center, intensity and other characteristics of the northern rainy region vary greatly in the following summer of different La Niña events, mainly because they are affected by the intensity of the La Niña event itself, the location of its cold SST center, and its different development and evolution trends in spring and summer, as well as other seas (such as the Indian Ocean).

The Atlantic Ocean, etc.), plateau snow cover and Arctic sea ice, intraseasonal oscillations in the atmosphere, and other factors.

In terms of agriculture, first, it is necessary to pay attention to the impact of heavy rainfall and flooding, especially the adverse impact of regional rainstorm processes on agriculture in the northern region; Second, some areas in the south need to do a good job in drought coping with drought to reduce the adverse impact of continuous drought on crop growth.

The impact of La Niña on China is mainly manifested in two aspects: temperature and precipitation.

In the winter when most La Niña events reach their peak, the cold air activities affecting China are more frequent and stronger than normal, and the temperature in most parts of central and eastern China is more likely to be lower than that of the same period in normal years. When the La Niña phenomenon develops, the Arctic vortex may appear in an extremely unstable state, which can easily lead to the Arctic cold current or cold air mass to move southward, and the movement of cold air to the south, China just happens to be in the affected area, so the cold in China will inevitably appear, and the stronger the development intensity of the La Niña phenomenon, the stronger the cold airflow affecting China.

When the La Niña phenomenon develops, the water vapor conditions in the southern part of China will deviate significantly from the same period of the year due to the influence of La Niña events, which is not conducive to the formation of precipitation. Judging from historical data, the temperature in the central and eastern parts of China tends to be low in winter in La Niña years. However, it should be pointed out that in the context of global warming, the factors affecting China's winter climate are more complex, in addition to La Niña events, there are also factors such as Arctic sea ice melting, Eurasian snow cover changes, and sea surface temperature anomalies in other sea areas.

Summary. 2022 is La Niña. And it's a double La Niña.

La Niña is a condition in which the waters of the central and eastern Pacific Ocean become abnormally cold. El Niño is a climate phenomenon that occurs when the SST anomaly warms in the tropical Pacific Ocean, and the warming of the tropical Pacific Ocean on a large scale causes global climate change.

2022 is in line with La Niña due to cooler temperatures and colder than usual years.

Is summer 2022 La Niña?

2022 is La Niña. And it's a double La Niña. La Niña is a condition in which the waters of the central and eastern Pacific Ocean become abnormally cold.

El Niño is a climate phenomenon that occurs when the SST anomaly warms in the tropical Pacific Ocean, and the warming of the tropical Pacific Ocean on a large scale causes global climate change. In 2022, due to the lower temperature, it will be colder than usual, so the first slag is in line with the Sakura quietly La Niña phenomenon.

Is summer still La Niña?

Hello, that's right.

It may not be that the temperature is high in the summer.

How much rainfall will there be in the Northeast in 2022?

Because this year's weather is caused by the "Luzi Jane La Niña phenomenon". La Niña is a rare cold-water phenomenon in the east-central Pacific Ocean. The southeast trade winds blow the surface of the sun-scorched sea water to the western part of the Pacific Ocean, causing the western part of the ocean to increase by nearly 60 centimeters higher than the eastern sea level, the sea temperature of the western part of the pants increases, the air pressure drops, the moist air accumulates to form typhoons and tropical storms, and the bottom sea water in the eastern part of the ocean rises, causing the eastern Pacific water to become colder, so the temperature in the northeast this year is very low, and there is a lot of rainfall.

Can you switch from La Niña to El Niño this year?

The eruption of the Tonga volcano will destroy the Pacific Ocean and produce anomalous westerly winds, which will inhibit the cold water overturning in the eastern tropical Pacific Ocean and eventually lead to a rise in sea temperatures, which may end the current La Niña phenomenon and turn into an El Niño phenomenon.

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2022 is the year of La Niña

In the past 20 years, due to global warming caused by the greenhouse effect, in fact, the "El Niño" phenomenon was more common, but due to the abnormal climate, "La Niña" has been unexpectedly appearing since 2020 and has been reluctant to leave. For Fall/Winter 2022, we are also likely to see the third consecutive La Niña.

La Niña and El Niño are two siblings with different personalities, and La Niña has always corresponded to "cold". The National Oceanic and Atmospheric Administration (NOAA) defines La Niña as: "the periodic cooling of ocean surface temperatures in the central and east-central equatorial Pacific Ocean."

Typically, La Niña events occur every three to five years or so, but sometimes they can happen for several years in a row. ”

As hot as the summer is, the winter will be as cold as it gets

According to meteorological observations, 2022 has been identified as the strongest high temperature process since meteorological records began, with unprecedented duration, wide range, intensity and extremity. People often say that "how hot in summer is, how cold in winter is", and once the La Niña phenomenon develops, it is indeed possible to cause large fluctuations in atmospheric circulation again.

La Niña may cause an increase in weather phenomena such as cold spells this winter. Therefore, special attention should be paid to the number and intensity of the possible cold wave this winter. "In the winter of a normal year, a cold spell process may end in a few days, and then it will warm up quickly.

However, in La Niña years, the circulation background is conducive to the increase in the frequency of cold waves, leaving little room for warming, which may cause the average temperature to be lower throughout the winter.