atmospheric dust的意思|示意

Atmospheric dust, or airborne particulate matter, refer to the tiny particles suspended in the Earth’s atmosphere, mostly composed of dust, pollen, spores and tiny particles of smoke and man-made pollutants. These particles cover the entire globe and affect air quality, visibility, and human health.

Atmospheric dust plays an important role in climate change as it affects the Earth’s albedo and can modify cloud properties. It affects the Earth’s radiation balance and alters the cloud microphysics, causing radiation to be absorbed or reflected away from the Earth. This can have a cooling or warming effect on climate. Dust also affects air quality, as it can reduce visibility and create smog.

Atmospheric dust can adversely affect human health, as it contains various pollutants, such as sulphates and nitrates, which can be released into the air. This can lead to respiratory and cardiovascular diseases, asthma, and other illnesses. Long-term exposure to dust particles can also cause chronic diseases. In order to reduce exposure to dust and its effects, governments have set up emission controls, such as vehicle emission standards, to reduce air pollution.

In conclusion, atmospheric dust has an important role in climate change and human health, as it affects air quality and visibility, and can be a source of pollutants. Control measures can help reduce exposure to airborne pollutants and reduce its potential to cause harm to human health and the environment.