Global warming refers to what trend in the overall temperature of the earth

Global warming refers to the trend that the overall temperature of the earth continues to rise.

Due to the large amount of greenhouse gas emissions caused by human activities, such as carbon dioxide, methane, nitrous oxide, etc., these gases form a greenhouse effect-like effect in the atmosphere, causing the earth's temperature to rise.

The impact of global warming is very widespread and has had a profound impact on the global climate, ecological environment and human life. First, global warming causes polar glaciers to melt, which in turn causes sea levels to rise, which is particularly dangerous for coastal areas and small island countries. Secondly, global warming has also led to the frequent occurrence of extreme weather events, such as floods, droughts, storms, etc., which have had a serious impact on the ecological environment and agricultural production.

In addition, global warming has also led to the reduction of biological diversity. Some species have become extinct because they cannot adapt to climate change, which poses a threat to the stability of ecosystems and human survival. To combat global warming, the international community needs to take action to reduce greenhouse gas emissions while also adapting to climate change that has already occurred.

At the policy level, countries can formulate more stringent carbon emission standards, encourage the development of clean energy, and regulate the development of high-carbon emission industries through tax policies. At the individual level, we can also take some measures to reduce carbon emissions, such as reducing energy consumption, riding a bicycle or walking instead of driving, choosing to use low-carbon products, etc.

The distribution pattern of the earth's overall temperature:

1. Decreasing from low latitudes to high latitudes: This is due to the fact that the distribution of solar radiation decreases from low latitudes to high latitudes. Therefore, isotherms run roughly parallel to latitudes, with temperatures higher at lower latitudes and cooler at higher latitudes.

2. The temperatures of sea and land are different at the same latitude: in summer, the temperature of land is higher than that of ocean, while in winter, the temperature of land is lower than that of ocean. This is due to differences in the thermal properties of land and sea. The ocean has a higher specific heat capacity, so the temperature changes more slowly, while the land has a smaller specific heat capacity, and the temperature changes faster.

3. The temperature in plateaus and mountains at the same latitude is lower than that in plains and lowlands: This is due to the influence of terrain factors. Plateaus and mountains have steep terrain that allows air to move more quickly, lowering temperatures. Plains and lowlands, on the other hand, have flat terrain and relatively slow air movement, resulting in relatively higher temperatures.

4. The difference in the shape of isotherms between the north and the south: In the northern hemisphere, the isotherms are more tortuous. This is because the northern hemisphere is alternating between sea and land, and the properties of the underlying surface are very different, so the isotherms deviate from the latitudes. In the Southern Hemisphere, it is mainly the ocean, and the underlying surface has a single nature. Solar radiation is the dominant factor affecting temperature, so the isotherms are roughly parallel to the latitudes.