Thursday, Oct 27th

Last update05:20:13 AM GMT

You are here News Environment Black carbon ranks as second-biggest human cause of global warming

Black carbon ranks as second-biggest human cause of global warming

E-mail Print PDF

Black carbonSoot ranks as the second-largest human contributor to climate change, according to a new analysis released Tuesday, exerting twice as much of an impact as previously  thought.

The four-year, 232-page study of black carbon, published in the Journal of Geophysical Research: Atmospheres, shows that short-lived pollution known as soot, such as emissions from diesel engines and wood-fired stoves, has about two-thirds the climate impact of carbon dioxide. The analysis has pushed methane, which comes from landfills and other forces, to third place as a human contributor to global warming.

Black carbon, or soot, accelerates warming because the fine particles absorb heat when they are in the air and when they darken snow and ice. Although some lighter-colored fine particles can have a cooling effect because they block sunlight, other black carbon sources have a warming effect because they absorb it. They also accelerate glacier melting and can disrupt regional weather patterns.

The findings came out on the same day that the National Oceanic and Atmospheric Administration announced last year’s global average temperature ranked as the 10th-warmest on record, and NASA found it was the ninth-warmest. The two agencies analyze temperature data differently, but both found that with the exception of 1998, the nine warmest years since 1880 all have occurred since 2000.


Most Recent Related Stories...

World on track to lose two-thirds of wild animals by 2020, major report warns

wild animals on track to be lost by 2020The number of wild animals living on Earth is set to fall by two-thirds by 2020,...

5.5 Earthquake Hits Central Italy, Tremors Felt In Rome

Earthquake hits ItalyA 5.5-magnitude earthquake Wednesday hit central Italy, about 50 miles north of the site of a...

Fracking Linked to Cancer-Causing Chemicals, Yale Study Finds

Fracking chemicals linked to cancerYet another study has determined that hydraulic fracturing, or fracking, might be a major public health...

DiCaprio's Climate Doc Exposes Destruction of Rainforest for Palm Oil as Huge Driver of Global Carbon Emissions

Rain forest destructionA new documentary produced and starring actor and activist Leonardo DiCaprio premieres in Los Angeles today...
America's # 1 Enemy
Tee Shirt
& Help Support!
TVNL Tee Shirt
Conserve our Planet
& Help Support!
Get your 9/11 & Media
Deception Dollars
& Help Support!
The Loaded Deck
The First & the Best!
The Media & Bush Admin Exposed!