global dimming

(redirected from Atmospheric Brown Cloud)

global dimming

n.
A reduction in solar radiation reaching the earth's surface, caused by fine particulate pollution in the atmosphere, which reflects the sun's radiation back into outer space, especially when water vapor condenses around the particles. Global dimming causes a reduction in the average global temperature and is thought to disrupt weather patterns.

global dimming

n
(Physical Geography) a decrease in the amount of sunlight reaching the surface of the earth, believed to be caused by pollution in the atmosphere
References in periodicals archive ?
In 1997, he had co-led an international research team that first discovered the climate impact in Asia of widespread air pollution, known as the atmospheric brown cloud (ABC).
The atmospheric Brown Cloud as a whole stretches from the Arabian Peninsulas to China and into the western Pacific," said Nick Nuttall, spokesperson of the office of the executive director of the United Nations Environment Program (UNEP) in Nairobi city in Kenya.
I expect the Atmospheric Brown Cloud to be now firmly on the international community's radar as a result of today's report.
Achim Steiner, head of the UNEP, said on Thursday: "One of the impacts of this atmospheric brown cloud has been to mask the true nature of global warming.
The emergence of the atmospheric brown cloud problem is expected to further aggravate the recent dramatic escalation of food prices and the consequent challenge for survival among the world's most vulnerable populations," the report said.
A study appearing in the ACS' journal Environmental Science and Technology has reportedly resolved long-standing questions about sources of air pollution responsible for Asia's infamous atmospheric brown clouds.
Inefficient combustion in poor diesel engines, open cooking fires, and the burning of coal and biomass produce aerosols with organic soots, or "black carbon," as well as atmospheric brown clouds.
Atmospheric brown clouds intercept sunlight in the atmosphere by both absorbing and reflecting it, thus cooling the surface and heating the atmosphere.
Current estimates of the overall effect of light-dark mixtures--including the so-called atmospheric brown clouds of pollution found in parts of Asia--are based largely on computer simulations, says Ramanathan.
The leader of the Atmospheric Brown Clouds Project, Dr.
In recent years, the station's analyses of sand storms in China, atmospheric brown clouds and atmospheric mercury have won recognition from international scientists, according to Dr.
Cities from Beijing to New Delhi are getting darker, glaciers in ranges like the Himalayas are melting faster and weather systems are becoming more extreme, in part, due to the combined effects of human-made Atmospheric Brown Clouds (ABCs) and greenhouse gases in the atmosphere," stated the UNEP report.
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