Global dimming is a decrease in the amount of sunlight landing on earth that was measured between 1950 and 1990.
It was caused by pollutants ('particulates') like sulphate aerosols ('floaters') in the air which absorbed and/or reflected solar energy, producing a slight cooling of the atmosphere, hiding the build-up of greenhouse gases.
Anti-pollution laws gradually made the air cleaner and the cooling effect also disappeared. There is now no global dimming.
Because it stops sunlight reaching plants meaning the plants don't grow because the sunlight is going into space because it reflects of the ash and gas in the earth's atmosphere. This means no light can get to the chlorophyll in the plant so it cant photosynthesize - they can't produce any food for themselves they can't take in CO2 and produce Oxygen.
global dimming has devastating effects. it can kill animals and plants and humans.
It is good and bad because global dimming means that there is less photosynthesis (bad) but it also means that there is less global warming (good).
Not as much as it used to: Efforts to reduce 'particulate air contaminants' have reduced the soot that at one time blocked out Solar Radiation. Now It just comes on through!
Global dimming occurs when the clouds in the sky reflect the sun's energy back into space. It is also caused by greenhouse gasses. Global dimming can be dangerous because it indirectly causes crops to die, and the waters in the world's oceans to become cooler.
carbon dioxide water carbon particulates (add to global dimming)
Ozone has nothing to do with Global warming. it has to do with UV penetration.
CO2 is bad in the sense that it is toxic to animal life and is believed to be largely responsible for global warming. CO2 is good in the sense that plants can't live without it.
No. Only bad for your children and grandchildren.
Global dimming was a time in the last century when temperatures were cooler because there was so much pollution in the air that it reflected away some of the sunlight. This was not a good situation. If global dimming returned the earth might be cooler, but the air would be more polluted causing lung diseases and other undesirable effects.
To battle Global Dimming we could try to reduce aeroplane contrails and to be done on a Global scale we would see a large increase in Global Warming.
Global dimming is a gradual reduction of global direct irradiance, or electromagnetic radiation, that hits the Earth's surface. The process interferes with the hydrological cycle.
Global dimming stops the sun's heat and light reaching the earth. If this lasts for a long time it could cause much loss of life. Global dimming is one suggestion for the death of the dinosaurs.
Global dimming occurs when the clouds in the sky reflect the sun's energy back into space. It is also caused by greenhouse gasses. Global dimming can be dangerous because it indirectly causes crops to die, and the waters in the world's oceans to become cooler.
When a powerful volcano erupts, it sends dark clouds of ash into the atmosphere. These dark clouds block out the sun's rays, causing global dimming.
Aerosols
because it's effect a lot of everything
Global warming is the observed increase in temperature caused by the increase of greenhouse gasses. Greenhouse gasses warm the planet by trapping infrared radiation and slowing its escape into space. Global dimming could roughly be described as the opposite. It is caused by fine particles in the atmosphere (known as "aerosols"). These particles reflect sunlight away, reducing the overall amount of radiation that enters the planet. This has a cooling effect.
they are good for us.
Keep the air clean with Clean Air Acts around the world.
Global dimming happens for a few days after a volcanic eruption, when the air is full of ash and particulates that block the sun. So the earth cools for a few days. There were some years between 1960 and 1990 when the sun's radiation by about 4% by smoke from bush fires, pollution and particulates in the atmosphere, particularly sulphate aerosols. So global dimming is usually man-made, except after a volcanic eruption.