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La Nina's Influence on China in 2020

What influence does La Nina have on China?

When La Ni? a phenomenon appears, Leng Xia fever is prone to occur in winter in China, and the number of tropical cyclones landing in China is more than normal, resulting in the phenomenon of "drought in the south and waterlogging in the north".

La Nina has an influence on the summer temperature in Northeast China. The temperature is higher, but in El Nino years, the temperature is often lower in summer. Northeast China is one of the main grain producing areas in China, and temperature changes have a certain impact on grain output.

La Nina also has an impact on precipitation in flood season in North China. During La Nina period, there was more precipitation in North China during the flood season, and the subtropical high in La Nina year was northward, which was beneficial to the formation of rainy atmospheric circulation in North China during the flood season.

In the summer after most La Nina events, the East Asian summer monsoon tends to be stronger, the western Pacific subtropical high tends to be northward, and it is more likely that there will be more precipitation in northern China.

The intensity of La Nina events

However, the range, center, intensity and other characteristics of rainy areas in the north are quite different in the summer after different La Ni? a events, which are mainly influenced by the intensity of La Ni? a events, the location of its Leng Hai temperature center, the different development trends in spring and summer, and other factors such as sea temperature in other sea areas, sea ice and snow in the plateau and the Arctic, and intra-seasonal oscillation of the atmosphere.

In agriculture, first, we need to pay attention to the impact of rainstorm and flood, especially the adverse impact of rainstorm on agriculture in northern China. Second, some areas in the south need to do a good job in coping with drought to reduce the adverse effects of persistent drought on crop growth.

The World Meteorological Organization says La Nina phenomenon has formed. What is La Nina phenomenon? What impact does it have on our country?

La Nina is a climate phenomenon. The World Meteorological Organization says that La Nina has been formed, and this year's La Nina is very strong and will last for a long time. Temperatures, precipitation and storms in many parts of the world will be affected, which will also have many climate impacts on China. La Nina's influence on the weather is usually opposite to El Nino's. ..

1. La Nina phenomenon is that the sea surface temperature in the central and eastern equatorial Pacific drops sharply, and the tropical atmospheric circulation will change.

When La Nina phenomenon appears, it will cause global climate anomalies. La Nina will make the sea water in the central and eastern Pacific Ocean very cold, while the trade winds in the east will blow the sea water with very hot surface to the western Pacific Ocean, causing the sea level in the west to be several tens of centimeters higher than that in the east. In the west, the sea water temperature will also rise and the air pressure will also drop, so typhoons and tropical storms will form.

La Nina will have a great impact on the climate in China, and it will also affect all countries in the world.

There will be many extreme situations in the climate. Due to the La Nina phenomenon, there may be extremely cold weather or very abundant precipitation in China. It has a great influence on winter in our country, and winter is very easy and cold. La Nina phenomenon will also make the summer temperature in China higher, which will be more obvious in Northeast China, and high temperature weather will also have a great impact on food production. Under the influence of La Nina phenomenon, precipitation in flood season in North China will also increase.

In short, every La Ni? a phenomenon is different, and its impact on the climate will also be different due to other factors. The Meteorological Bureau should always pay attention to the forecast and give early warning to residents. La Nina phenomenon is also a natural driving force of the earth's climate, which usually cools the global climate, but the heat captured by greenhouse gases can also offset this effect. This year's La Nina phenomenon is bound to be affected by global warming.

La Nina has a 70% probability, what impact will it have on China?

La Nina phenomenon has been formed in 2020, and the authoritative statement issued by the American Climate Prediction Center means that global climate change may be further strengthened. Of course, the formation of La Nina phenomenon will also have a certain impact on our country, but the intensity is different, so we need to prepare for it. This is also a new natural phenomenon after a weak El Ni? o phenomenon in 2020. La Nina phenomenon will appear with the signal of cooling, which is a conventional phenomenon.

Of course, although La Ni? a phenomenon has a cooling effect, it does not mean that there will be a "sharp" cooling situation on the earth, because global warming may be much greater than the cooling degree of La Ni? a phenomenon, so 2020 may still be the hottest year in history.

NOAA confirmed that La Nina phenomenon has appeared.

According to the new public data released by NOAA in September, La Nina actually appeared in August, and it is estimated that there is a 75% probability that it will last the whole winter, so this winter will probably be one of the main periods of La Nina. Through Ni's analysis? O3.4 The monitoring data of abnormal sea surface temperature shows that it has reached the average value, and the lowest limit of -0.6℃ appeared in the data collected in August. Although this is not the only standard, the comprehensive data has met the long-term average of 1986-20 15.

At the same time, according to most dynamic computer models, the sea surface temperature will remain below the La Nina threshold of -0.5 degrees Celsius throughout the winter. So NOAA released a 75% probability in winter. Under the influence of La Nina, the change of atmospheric circulation over the Pacific Ocean will continue to affect global weather and climate phenomena. Although El Nino will also have an impact, the two are opposite. At the same time, La Nina will also lead to the above-average rainfall in Indonesia, the cool and humid weather in southern Africa and the drier weather in southeastern China.

2020 may be one of the hottest years on record. How much impact will La Nina have on the climate in China?

As we all know, many unexpected things have happened. For example, the COVID-19 epidemic has been going on in China for more than half a year, which has had a certain impact on the economic development of China. As college students, we have been left at home for a long time. Now there is a phenomenon that everyone should have discovered.

The weather is very hot in summer and lasts until winter. Compared with last winter or the winter before last, this winter made us realize that we seem to have had a fake winter. This winter is not so cold, even we feel a little hot and dry. No matter in the street or around us, many people go out just wearing a sweater. The weather this year is one of the hottest on record.

However, according to the survey, the organization explained to the outside world that La Nina phenomenon occurred this year. This phenomenon will have a great impact on the climate in China. For example, this summer is extremely hot, and this temperature has continued until this winter. As we all know, every decade will be warmer than the last one. Maybe this cold weather will make some people who have adapted to the warmth uncomfortable.

But this is really inevitable. If we are always in a very warm environment, then our earth will face it. Very serious danger. Some plants can only survive in cold. If the temperature gets warmer and warmer, Nana's preparation may be endangered. Creatures like polar bears in our country. I started this life in Beijing. They just live in a cold environment. If the environment gets warmer, accidents will pose a certain threat to their survival. Carbon dioxide warms the world, which leads to the greenhouse effect in China. But La Nina phenomenon points out that this winter may be extremely cold from the end of this year to the beginning of next year. Cold weather may also have a certain impact on people's travel. Can we accept this cold weather, which has been warm for several months?

Extreme weather may occur this winter, and the double La Nina year has been confirmed. What effect will it have on China?

Introduction: Extreme weather may occur this winter, and La Nina phenomenon has been confirmed, which has a certain impact on China's climate. First, the probability of temperature drop in winter is obviously higher. Judging from the turnover this year, the situation of drought in the south and waterlogging in the north is very obvious, and the rainfall in the north has increased significantly. Some areas have also been affected by waterlogging, and the rainfall in Zhengzhou and Shanxi has reached a new high this year. However, due to global warming, La Nina phenomenon may also change, and the specific situation needs to be analyzed later.

I. What is La Nina?

La Nina means "little girl" in Spanish. La Nina phenomenon mainly refers to the cold water phenomenon that the sea surface temperature in the equatorial central Pacific Ocean is unusually cold in a large range, and it lasts for a long time and has great intensity. It and El Nino, where the sea surface temperature continues to rise, are considered to be the main reasons that may lead to global climate anomalies. But La Nina's influence is not as obvious as El Ni? o, which generally makes our country colder in winter and hotter in summer.

Second, how to prevent the cold weather?

First of all, we should eat healthily, increase nutrition, drink plenty of water, supplement vitamins and protein, take an active part in sports and avoid overwork. Only in this way can we enhance our resistance, avoid getting sick, and pay attention to personal hygiene in our daily life. If you feel unwell, you should seek medical advice early. Usually, we should also pay attention to indoor ventilation, do a good job of cleaning and disinfection, and also pay attention to avoiding some crowded places to reduce the inhalation of some germs; In diet, we should also pay attention to hygiene and cleanliness. .

Third, how to protect vegetables from freezing?

Because the cold weather this year will lead to extreme weather, for some areas with low temperature, vegetables such as melons and fruits will be more vulnerable to freezing, so it is necessary to do a good job in field management. The same is true of vegetables at ordinary times, and the temperature is raised in time. Like some rainy places, if conditions permit, some fields can be sheltered from the rain, which can effectively reduce the occurrence of seedling tolerance in the fields, and at the same time, we should do a good job of heat preservation in greenhouses.

What does La Nina mean? What impact will it have on China in 2020?

In 2020, it will be colder than in previous years. During the National Day, the temperature began to drop to about 10 degrees, and it even snowed in some parts of the north. There are rumors on the Internet that the coldest winter in 60 years is coming. In many messages, many people mentioned the "La Nina effect". What does La Nina mean? What impact will it have on China in 2020? ?

What does 1. La Nina mean?

La Nina phenomenon is an abnormal cooling of seawater in the central and eastern Pacific Ocean. La Nina, contrary to the El Ni? o phenomenon, is also called "anti-El Ni? o" or "cold event". It refers to the abnormal drop of water temperature in the eastern Pacific near the equator, which is characterized by the obvious cooling of the eastern Pacific and the global climate chaos, and always appears after the El Ni? o phenomenon.

When La Ni? a phenomenon appears, Leng Xia fever is prone to occur in winter in China, and the number of tropical cyclones landing in China is more than normal, resulting in the phenomenon of "drought in the south and waterlogging in the north". 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 Nina have on China in 2020?

1. Impact 1: Low temperature

This year's La Nina phenomenon will obviously not be as violent as in 2008, but it will also bring some climate impacts. Experts predict that rainfall in southern Africa and central North America will be lower than in previous years, while rainfall in parts of South Asia, Southeast Asia and Australia will be higher than in previous years.

2. Impact 2: More typhoons.

For China, apart from the drop in temperature, the most obvious impact may be that the number of typhoons will increase, but the probability of "cold winter" is still relatively small.

However, due to the La Ni? a effect, the atmospheric flow is more frequent, and the probability of a sharp cooling in the northeast is still relatively large. However, the influence of La Nina is different every time, so it is not completely certain that it will be a "cold winter" at present, and further comprehensive judgment is needed.

Third, how to deal with La Nina phenomenon in agricultural planting?

1. Cover film

After winter, the greenhouse should be covered with grass. In order to prevent the grass from getting wet by rain and snow, you can cover it with a plastic film.

Dig a cold ditch

Dig a 40-50 cm cold ditch and fill it with insulation materials such as weeds and horse manure to ensure the temperature in the shed.

3. Heat preservation measures

Such as heaters, heating blocks, etc. In the case of extremely low temperature, the temperature in the shed can be improved by lighting the heating block in time, especially when the temperature is low at night in winter.

Although La Nina effect may bring strong cooling, as long as we take enough preventive measures, we can minimize the loss and even survive the winter and harvest normally without the influence of the weather.