If the earth does not have four seasons, it will bring a series of ecological and climate changes. First of all, the global climate will no longer change in the four seasons, the length of sunshine at the same latitude will remain fixed throughout the year, and the temperature fluctuations from cold to summer will no longer exist in the tropical regions. There are no four seasons in summer, and the length of day and night is equal all year round on the equator, and the amplitude of the change in the length of day and night from the equator to the Tropic of Cancer gradually increases, and the difference between the longest and shortest days on the Tropic of Cancer is 2 hours and 50 minutes.
However, such changes will have a significant impact on the global climate, potentially triggering global climate chaos and various extreme climate disasters. For example, if the earth stops turning its poles, it will create huge air currents, and the collision of cold and warm currents will cause hurricanes, which will be a phenomenon that has not been seen on the earth before, and may cause many cities to be submerged.
At the same time, the change in the earth's temperature may change dramatically, and the temperature difference may reach 50 degrees above and below in a month, which will lead to more extreme weather in various regions, which will have a serious impact on food crops and plants, and may even lead to mass extinctions on a global scale, when human beings will face greater disasters and the earth will no longer be suitable for habitation.
In general, without the four seasons, the Earth's climate and ecology would undergo significant changes, which could have a significant impact on the Earth's ecosystems and biodiversity.