Why is it so cold this New Year?

I am not an expert, so I found authoritative news reports to answer your questions, hoping to satisfy the experts of National Climate Center of China Meteorological Bureau. Statistical analysis shows that the strong La Nina phenomenon appears in the winter of that year and the spring of the following year, and the water temperature in the equatorial eastern Pacific will be low, which speeds up the atmospheric circulation. This anomaly directly leads to frequent cold air activities. La Nina phenomenon refers to the continuous abnormal drop of water temperature in the central and eastern equatorial Pacific, and its climate change characteristics are opposite to El Ni? o phenomenon. Marcoli 1 1, an expert on La Nina of the World Meteorological Organization, said in Geneva that La Nina was partly responsible for the snowstorm in southern China. Corey pointed out that when La Nina occurs, there will often be a stronger monsoon and a lot of rainfall in the monsoon region, and the frequency of Atlantic hurricanes will become higher. However, Curley also stressed that the rare snow and ice disaster weather in southern China is caused by many factors, and La Nina phenomenon is not the only reason. Zhang Xiaoli, director of the Forecast Department of the Municipal Meteorological Bureau, said that the analysis of the characteristics of this continuous low-temperature weather in Shenzhen is indeed somewhat different from the previous continuous low-temperature weather in winter and spring. Some old forecasters for many years also find it incredible. In previous years, the low temperature weather was mostly dry or sunny, and the wet and cold characteristics of this low temperature weather were very obvious. The warm and humid airflow in the southwest of the south is very strong, which aggravates the cold weather in the south. According to the analysis of the same weather factors for many years, if forecasters encounter the same weather conditions this year, the lowest temperature generally predicted is 10 to 12℃, and the predicted temperature this time is several degrees Celsius lower than before. This is also a weather phenomenon that the weather forecaster in Shenzhen has never encountered. Zhang Xiaoli thinks that there may be more factors influencing the weather change now, which is a new research topic of weather forecast. We can't fully explain the persistent low temperature weather in South China this year with La Nina phenomenon, which may be related to the changes of ecological environment in modern society, global warming and many other factors. Noun explanation "La Nina" phenomenon "La Nina" refers to the phenomenon that the sea surface temperature in the eastern and central equatorial Pacific Ocean continues to be abnormally cold, which is a new term used in meteorology and oceanography. It means "little girl". Contrary to El Nino, which means El Nino, it is also called "anti-El Nino" or "cold event". La Nina is the product of the interaction between tropical ocean and atmosphere. La Nina is formed when the sea surface temperature is lower than the average climate temperature by more than 0.5℃ and lasts for more than 6 months. In 2007 1 1 month, the World Meteorological Organization issued a report saying that La Nina phenomenon has formed and may last until the first quarter of 2008. In this round of La Nina phenomenon, the seawater temperature in northern Australia and western Indonesia is lower than usual; Therefore, WMO predicts that the climate change trend in some areas may fluctuate abnormally. An authoritative person of the World Meteorological Organization said that extreme weather in China is related to La Nina phenomenon.