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Latest Global dimming Stories

2011-09-01 11:27:38

A new study of dust-like particles of soot in the air – now emerging as the second most important – but previously overlooked – factor in global warming provides fresh evidence that reducing soot emissions from diesel engines and other sources could slow melting of sea ice in the Arctic faster and more economically than any other quick fix, a scientist reported here today. In a presentation at the 242nd National Meeting & Exposition of the American Chemical Society...

2011-04-14 15:28:30

Scientists have known for decades that black carbon aerosols add to global warming. These airborne particles made of sooty carbon are believed to be among the largest man-made contributors to global warming because they absorb solar radiation and heat the atmosphere. New research from Carnegie's Long Cao and Ken Caldeira, along with colleagues George Ban-Weiss and Govindasamy Bala, quantifies how black carbon's impact on climate depends on its altitude in the atmosphere. Their work, published...

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2011-01-24 10:15:00

Could Dimming the Sun Change Teleconnections in Weather Patterns as we Know Them? Solar radiation management projects, also known as sun dimming, seek to reduce the amount of sunlight hitting the Earth to counteract the effects of climate change. Global dimming can occur as a side-effect of fossil fuels or as a result of volcanic eruptions, but the consequences of deliberate sun dimming as a geoengineering tool are unknown. A new study by Dr Peter Braesicke, from the Centre for Atmospheric...

2009-11-30 21:25:03

Since 1985, seawater temperature in Kuwait Bay, northern Arabian Gulf, has increased on average 0.6°C per decade. This is about three times faster than the global average rate reported by the Intergovernmental Panel on Climate Change (IPCC). Differences are due to regional and local effects. Increased temperatures are having profound effects on key habitats and on power generation the Arabian Gulf. Researcher Dr Thamer Al-Rashidi of the National Oceanography Centre, Southampton, said:...

2009-08-14 12:29:21

New research shows that air pollution in eastern China has reduced the amount of light rainfall over the past 50 years and decreased by 23 percent the number of days of light rain in the eastern half of the country. The results suggest that bad air quality might be affecting the country's ability to raise crops as well as contributing to health and environmental problems.The study links for the first time high levels of pollutants in the air with conditions that prevent the light kind of...

2009-05-07 11:19:45

Scientists say solar radiation reaching the Earth's surface in the United States occurred at higher rates than thought during the past 12 years. Several studies have found evidence of an increase in solar radiation -- called brightening -- reaching the Earth during the late 1990s. Past efforts correlated brightening trends to decreases in atmospheric aerosol concentrations and recovery from the Mount Pinatubo eruption. Researchers from the National Oceanic and Atmospheric Administration, the...

2009-04-23 08:26:27

Plants absorbed carbon dioxide more efficiently under the polluted skies of recent decades than they would have done in a cleaner atmosphere, according to new findings published this week in Nature.The results of the study have important implications for efforts to combat future climate change which are likely to take place alongside attempts to lower air pollution levels.The research team included scientists from the Centre for Ecology & Hydrology, the Met Office Hadley Centre, ETH...

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2009-03-13 07:05:00

According to a report in Friday's edition of the journal Science, skies all over the world are dimming due to increases in airborne pollution over the past 30 years.The new study compiles satellite and land-based data on global dimming over a longer period than had previously been available."Creation of this database is a big step forward for researching long-term changes in air pollution and correlating these with climate change," Kaicun Wang, of the University of Maryland, told the...

2009-01-23 13:35:32

Swedish and Indian researchers constrain the sources of climate- and health-afflicting soot pollution over South Asia A gigantic brownish haze from various burning and combustion processes is blanketing India and surrounding land and oceans during the winter season. This soot-laden Brown Cloud is affecting South Asian climate as much or more than carbon dioxide and cause premature deaths of 100 000s annually, yet its sources have been poorly understood. In this week's issue of Science...

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2008-11-14 14:25:00

Thick smog clouds that loom over Asia threaten the livelihood of crops and contain particles that actually reflect the sun's rays away from the earth, the U.N. reported on Thursday. These so-called "atmospheric brown clouds" are primarily caused by the burning of fossil fuels and firewood. They can be more than one mile thick and result in changing weather patterns in areas across Asia, the Middle East, southern Africa and the Amazon Basin. First identified by the report's lead researcher in...


Latest Global dimming Reference Libraries

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2009-07-06 17:01:44

Arctic haze is a phenomenon that occurs in the atmosphere at high latitudes in the Arctic due to air pollution. What distinguishes Arctic haze from haze found elsewhere, is the ability of its chemical ingredients to endure in the atmosphere for a longer period of time compared to other pollutants. Due to limited snowfall, rain, or turbulent air to displace pollutants from the polar air in the spring, Arctic haze can continue for more than a month in the northern atmosphere. Arctic haze was...

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