Why is Hong Kong hotter than the mainland?

There are several reasons why Hong Kong is hotter than the mainland:

1. Location: Hong Kong is located on the southeast coast of the South China Sea and belongs to the tropical monsoon climate zone. However, the climate types in Chinese mainland are quite diverse, covering tropical, subtropical, temperate and frigid zones, so the temperature in different parts of the mainland will vary greatly.

2. Degree of land use and urbanization: Hong Kong is a highly urbanized area, and buildings and concrete have strong heat absorption and storage capacity, resulting in high temperature inside the city. However, the degree of urbanization and land use in Chinese mainland is very different, and the degree of urbanization and architectural layout in different regions will also affect the temperature.

3. Residence and population density: Hong Kong is one of the regions with the highest population density in the world. Relatively speaking, the population density in Chinese mainland is relatively low. High population density will lead to an increase in the temperature around the city, because people's metabolism and breathing will generate heat and increase the urban heat island effect.

4. Automobile and industrial emissions: Hong Kong is an international transportation hub and commercial center, and automobile exhaust and industrial emissions will increase the pollutant content in the air. These pollutants absorb solar radiation in the atmosphere and release heat, resulting in an increase in temperature.

It should be noted that although the overall temperature in Hong Kong is higher than that in Chinese mainland, the specific temperature difference is also affected by many factors such as season, weather system and ocean circulation. In addition, there are other factors that cause the temperature difference between Hong Kong and the Mainland, such as topography, landforms and geographical environment.