Why is the climate abnormal in the south this year?

The first reason is that we are in a La Niña state this year, that is, the sea surface temperature in the eastern equatorial Pacific is lower than normal and below the negative degree, and the impact of this phenomenon on China's climate is very obvious. It's going to have a cold winter, so we can see that this cold winter is coming this year.

The second reason is that the two conditions that must be met for snow or rain are 1Warm and humid air currents from the tropics. 2.

There is cold air from the alpine regions. Areas of winter snowfall (the same is true for areas of summer rainfall) are located near fronts, i.e. at the junction of warm and cold air masses. This position is not fixed, it is determined by the strength of the forces of the two natures.

The cold air mass is weak, and the front and precipitation area are higher latitudes, and the cold air mass is stronger, and the front and precipitation areas are lower latitudes. The land cold high that affects China in winter is the Asian high (also known as the Mongolian and Siberian high pressure) centered in Mongolia and Siberia, and its sphere of influence is very large, which has a great impact on the weather in China, especially in the northern region. The cold air that affected our country in the early part of midwinter this year is relatively weak, and the number of times is not much, even with the cooperation of warm and humid airflow, it is not easy to snow without cold air.

However, since 2008, the Asian high pressure is very active, and the cold air mass continues to form southward to affect our country, resulting in a wide range of windy cooling weather, but because the warm air mass in the south this year is also very active, a large number of warm and humid air currents from the Pacific Ocean and the Indian Ocean frequently visit the southern region, when the strong cold air mass from Siberia, Mongolia quickly moves south to the southern region, and meets with the warm and humid air mass, the cold, warm two just combined. Affected by the combination of these two airflows, there has been a lot of rain and snow in recent times, especially in the Yangtze River basin, and the weather has been maintained at low temperatures for a long time. If there is only a strong cold air mass, and there is no large amount of water vapor provided by the warm and humid air mass, there will only be strong winds and cooling weather in the south; If there is only a large amount of water vapor provided by the warm and humid air mass, and no cold air mass is present, there is no catastrophic weather at all.

And when both are in place, disaster strikes.

The difference between the north and the south is evident in:

1. The temperature difference is very big in spring. In the northern region, the summer is hot, the winter is low, and the temperature varies greatly from year to year. The southern region has a high temperature in summer and a warm winter, and the annual temperature range is smaller than that in the north.

The main reason for the large temperature difference in the lack of forest in winter is that the latitude difference is large, the latitude of the northern region is high, and the solar altitude angle in winter is small compared with the south, the length of the day is short, and there are many sunny days, so the solar radiation energy received is not much different. The northern region is close to the source of the winter monsoon, which is greatly affected by the winter monsoon and the temperature is low. Due to the obstruction of the Qinling Mountains and other mountain ranges, the southern region is less affected by the winter monsoon and is warm.

2. There is a large difference in precipitation. The south has a humid climate with more precipitation and less precipitation in the north.

Reason: The summer monsoon landed on the southeast coast, and the precipitation brought by it affected our country from the south to the north, so there was a lot of precipitation in the south, and the rainy season began in April and ended in October, and the rainy season was short in the northern region.

I think the main reason is that the air flow in this year of the potato is relatively strange, and there are many warm airflows that disturb the convective airflow of the shed, which causes us to have a lot of hot elements in the air, so it will be very hot in the end.

The main reason is that the damage to the ecological environment is relatively serious, and there is a lot of carbon dioxide gas, so there will be this abnormal climate.

Because the environment is destroyed, the ozone layer is hollowed, and the Arctic and Antarctic glaciers are melting.

Latitude differences lead to heat differences between north and south; topographic influences;

On the one hand, the natural climate itself is heating up, coupled with anthropogenic greenhouse gas emissions.

It is caused by El Niño and La Niña. There will be them every few years, and there is no pattern of how they happen at the moment.

2012 is coming, you won't know it, hehe.