What is the harm of the heat island effect?

This is due to the heat storage of sunlight by buildings and asphalt, the hot air emitted by air-conditioning equipment in the buildings that line the city interior, and the urban dome effect caused by the reduction of trees.

Due to the high temperatures, there is sudden rainfall. In recent years, buildings have been moving to higher altitudes, and the banks of the river are covered with buildings, all of which block the flow of wind, exacerbating the high temperature in the city.

Here are the possible causes of the urban heat island effect:

1. The reduction from trees and bare ground, the reduction of rainfall infiltration into the ground, and the reduction of evaporation or evapotranspiration.

2. From air pollution, the increase in solar heat absorbed by the atmosphere.

3. From the increase in solar heat absorption by the ground surface covered with low albedo asphalt and glass curtain walls and concrete.

4. Artificial waste heat from industrial activities, automobiles, air conditioning equipment, etc.

5. From the screen building, reduce the change and flow of wind.

Countermeasure. 1. Tree planting, in recent years, there are many examples of roof tree planting and wall tree planting. The obligation to green roofs is also documented in the Kyoto Agreement. There are also examples of self-funded tree planting in many cities.

2. Use non-reflective materials, such as heat-dissipating coatings, to reduce the outdoor temperature.

3. Adopt green roofs that do not require additional water supply and power supply.

4. Adopt water permeability and water retention paving, and use water to absorb heat.

5. Ensure the circulation of wind. Reducing screen-type buildings is like allowing cooler air to flow from water bodies and suburbs to the city center. The reopening of the Potzdamerplatz area around Stuttgart and Berlin is a well-known example.

6. Sprinkling. 7. Limit the artificial heat exhaust (such as air conditioning) of aircraft, automobiles and buildings.

8. Encourage people to use public transportation.

9. Disperse the urban population to the suburbs to reduce artificial heat discharge.

10. Reasonably plan urban construction, set up parks, green spaces or pools and wetlands, build artificial rivers, etc., and absorb heat to reduce temperature.

1. Under the influence of the "heat island effect", the clouds and fog over the city will increase, causing harmful gases and smoke to accumulate over the urban area, forming serious air pollution. Many human diseases are caused by the "heat island effect".

2. Medical studies have shown that the ambient temperature is closely related to the physiological activities of the human body. When the ambient temperature is higher than 28 degrees, people will feel uncomfortable; No matter how high the temperature is, it is easy to lead to irritability and heat stroke.

mental disorders; Temperatures above 34 degrees Celsius, accompanied by frequent heat waves, can also cause a series of diseases, especially the incidence of heart, cerebrovascular and respiratory diseases, and the mortality rate increases significantly. In addition, high temperatures can also accelerate the rate of photochemical reactions, thereby increasing the concentration of harmful gases in the atmosphere, further harming human health.

3. Under the effect of the "heat island effect", the temperature of each place in the city is not the same, but presents a closed high temperature center. In these high-temperature areas, the air density is small and the air pressure is low, which is easy to produce cyclonic updrafts, so that various exhaust gases and chemically harmful gases around the surrounding areas are constantly replenished to the high-temperature areas. Under these harmful effects, residents of high-temperature areas are highly susceptible to digestive problems.

or neurological disorders, in addition, bronchitis.

Emphysema, asthma, sinusitis.

The number of respiratory diseases such as pharyngitis has also increased.

4. The serious urban heat island effect not only affects people's normal life and work, but also becomes a restricting factor for the further improvement of people's quality of life and the further development of the city. Therefore, it is of great significance to study the technical methods to reduce the urban heat island effect and take various measures to alleviate the impact of the heat island effect in order to improve people's quality of life and maintain the sustainable development of cities.

Summary. Hello, dear, the reasons for the hot bird effect: 1. The pollutants in the air above the city have a thermal insulation effect, which increases the reverse radiation of the atmosphere; 2. The building materials of urban buildings and roads change the surface heat exchange and atmospheric dynamics, and it is easier to absorb a large amount of heat radiation.

3. Most of the high-rise buildings in the city have reduced wind speed, and it is relatively difficult to transport at the level of heat balance; 4. Urban residents form abundant artificial heat sources in their production and life.

Hello, dear, the reasons for the hot bird effect: 1. The pollutants in the air above the city have a thermal insulation effect, which increases the reverse radiation of the atmosphere; 2. The building materials of urban buildings and roads change the surface heat exchange and atmospheric dynamics, and it is easier to absorb a large amount of heat radiation. 3. Most of the high-rise buildings in the city have reduced wind speed, and it is relatively difficult to transport at the level of heat balance; 4. Urban residents form abundant artificial heat sources in their production and life.

Definition of the heat island phenomenon: due to the dense urban building complex, asphalt roads and cement pavements have a greater heat absorption rate and less heat absorption rate than suburban soils and vegetation. It accelerates the warming of urban areas, and a large amount of radiation is radiated to the surrounding areas and the atmosphere, causing the temperature in urban areas to be generally higher than the temperature in the surrounding suburbs at the same time, and the high-temperature urban areas are surrounded by low-temperature suburbs, so this phenomenon is called the urban heat island effect.

Extended Information: Ways to Prevent the Heat Island Phenomenon 1Choose efficient and clean forms of greening, including street parks, roof greening and vertical wall greening, and water features.

It can effectively reduce the heat island effect and obtain a fresh and pleasant indoor and outdoor environment. 2.The management of greening in residential areas shall establish a management mechanism that combines greening with the environment, and establish relevant local administrative provisions to ensure that greening land.

3.Coordinate the planning and construction of roads, high-altitude corridors, streets and other major greenhouse gas emitters, and introduce green ventilation, wind systems, and outdoor fresh air into the interior to improve the microclimate.

The urban heat island effect is a phenomenon in which the temperature in one area is higher than that of the surrounding area. It is expressed as the difference in temperature between the two representative measurement points (i.e., the heat island intensity). There are two main types: the urban heat island effect and the Qinghai-Tibet Plateau heat island effect.

The heat island effect is a phenomenon of urban microclimate change caused by man-made changes in the local temperature, humidity, air convection and other factors on the urban surface. This phenomenon is one of the most obvious features of the city's climate.

The heat island effect is a phenomenon in which the temperature in one area is higher than that of the surrounding area. It is expressed as the difference in temperature between the two representative measurement points (i.e., the heat island intensity). There are two main types: the urban heat island effect and the Qinghai-Tibet Plateau heat island effect.

The urban heat island effect is one of the typical characteristics of urban climates. It is a phenomenon in which the temperature in the city is higher than in the suburbs. It refers to the phenomenon that when the city develops to a certain scale, the urban temperature is significantly higher than that of the suburbs due to the change of the properties of the underlying surface of the city, air pollution and the emission of artificial waste heat, forming a phenomenon similar to a high-temperature island.

The main reasons for its occurrence are the dense urban population, the heat exhaust of factories and vehicles, the release of residents' living energy, and the comprehensive impact of urban building structure and underlying surface characteristics.