This year (2021), the late spring cold is very strong, especially in the southern region of China, where it has snowed in many places. So, why is the late spring cold so strong this year?
First of all, we need to understand what late spring cold is. Late spring cold refers to a sudden drop in temperature at the end of spring, resulting in a significant cold snap. Late spring cold usually occurs from late April to early May, and it can have adverse effects on spring farming, spring planting, early leek, early melon and fruit production. So, what is the reason why the late spring cold is so strong this year?
First, the global climate is abnormal. Since 1900, the global temperature has risen by 1.1 ℃, which has led to abnormal global climate. According to data from the World Meteorological Organization, 2020 is one of the hottest years in history, with the global average temperature being about 1.2 ℃ higher than during the industrialization period. Such global climate anomalies have led to the intensification of some weather phenomena, such as the late spring cold this year.
Secondly, abnormal weather broke out in the Arctic. The Arctic region is one of the sensitive regions of the global climate system. Due to human activities and global climate change, the temperature in the Arctic region is rising faster. According to reports, in March this year, the average temperature in the Arctic region was more than 8 ℃ higher than normal, which made the Arctic sea ice melt faster than usual. This abnormal Arctic weather has a complex impact on the global climate. Some scientists believe that such Arctic weather may lead to the strengthening of the Arctic vortex, making it easier for cold air to invade south, leading to the occurrence of late spring cold this year.
In addition, changes in ocean temperature and pressure are also one of the factors contributing to the intense cold in late spring this year. According to data from the National Oceanic Prediction Station, this winter, a weaker than normal pressure jump occurred in the North Pacific Ocean, with abnormal changes in pressure, sea surface temperature, and other aspects. This change in ocean temperature and pressure has led to significant anomalies in the upper air circulation in the North Pacific, which in turn has led to a significant decrease in the temperature in southern China, resulting in a late spring cold.
In summary, the strong cold in late spring this year is mainly due to factors such as global climate anomalies, sudden abnormal weather in the Arctic, and changes in ocean temperature and pressure. This also reminds us that the trend of global warming is accelerating, and humans need to pay more attention to environmental protection and reducing greenhouse gas emissions in order to mitigate the impact of global climate change on human survival and development.