The weather has been hot and cold recently.

Spring is one of the seasons with the most obvious temperature change in a year, and the reasons for its changeable weather, cold and hot are mainly related to the following aspects.

Atmospheric circulation in temperate regions

In spring, in the temperate zone of mid-latitude in the northern hemisphere, the atmospheric circulation begins to shift from south to north. This transfer will lead to the continuous alternation of low pressure and high pressure, and cause various weather changes. For example, when cold air meets warm and humid air, it will form different climatic phenomena such as strong wind, rain or snow. These weather phenomena not only easily cause temperature fluctuations, but also may have an impact on people's lives and work.

Characteristics of continental climate

In spring, due to the lack of heat accumulation in the mainland, the surface temperature is relatively low, and after a long period of winter invasion, the soil becomes very dry. When warm and humid air flows into inland areas from the ocean, it is often affected by soil moisture absorption and surface heat dissipation, which makes the temperature drop rapidly. This situation will lead to drastic changes in the temperature in the mainland, which is prone to cold and hot.

Climate change and global warming

In recent years, with the acceleration of global climate change, the change of spring weather has become more complicated and changeable. Meteorologists say that global warming may lead to a series of extreme weather phenomena, such as strong winds, thunderstorms and droughts.

These extreme weather phenomena not only make the weather in spring more unpredictable, but also have a great impact on people's lives and work.

Other factors

Besides the above reasons, the changeable weather in spring is also related to other factors. For example, large-scale forest fires, sandstorms and earthquakes may have short-term and long-term impacts on climate and weather. In addition, human activities will also have a certain impact on the weather, such as cities.

Activities such as construction and transportation may lead to air pollution and climate change.

In short, there are many reasons for the changeable weather in spring, including atmospheric circulation, continental climate characteristics, climate change and global warming. In order to better cope with the weather changes in spring, people need to strengthen weather forecasting and monitoring, and at the same time strengthen their awareness of self-protection and take corresponding measures to reduce adverse effects.