News articles tagged with 'aerosol' (Page 7)
Absence of clouds caused pre-human supergreenhouse periods
— 11 Apr 2008 14:36 | Geology and palaeontologyIn a world without human-produced pollution, biological productivity controls cloud formation and may be the lever that caused supergreenhouse episodes during the Cretaceous and Eocene,…
Early polar explorers saw particulate haze in late 1800s
— 19 Mar 2008 11:47 | EnvironmentScientists know that air pollution particles from mid-latitude cities migrate to the Arctic and form an ugly haze, but a new University of Utah study finds surprising evidence that…
Satellite measures pollution from east Asia to North America
— 18 Mar 2008 12:10 | EnvironmentIn a new NASA study, researchers taking advantage of improvements in satellite sensor capabilities offer the first measurement-based estimate of the amount of pollution from East Asian…
Seismic images show dinosaur-killing meteor made bigger splash
— 25 Jan 2008 08:02 | Geology and palaeontologyThe most detailed three-dimensional seismic images yet of the Chicxulub crater, a mostly submerged and buried impact crater on the Mexico coast, may modify a theory explaining the extinction…
Human-generated aerosols affect our weather
— 22 Jan 2008 11:14 | EnvironmentThe rise of human-generated pollution in the global atmosphere is forcing a change in ocean circulation in the Southern Hemisphere, in turn affecting our region's weather systems…
Electric sand findings could lead to better climate models
— 8 Jan 2008 20:44 | PhysicsWind isn't acting alone in the geological process behind erosion, sand dunes and airborne dust particles called aerosols. The other culprit is electricity. By taking both factors into…
Tiny dust particles from Asian deserts common over western United States
— 13 Dec 2007 08:23 | EnvironmentIt has been a decade since University of Washington scientists first pinpointed specific instances of air pollution, including Gobi Desert dust, traversing the Pacific Ocean and adding…
Local sources major cause of U.S. near-ground aerosol pollution
— 17 Nov 2007 13:58 | EnvironmentA new NASA study estimates that most ground-level particulate pollution in the United States stems from regional sources in North America and only a small amount is brought to the country…
Measurements to determine the role of atmospheric fine particles in climate change
— 16 Nov 2007 12:27 | EnvironmentFinnish-led international aerosol project starts extensive worldwide atmospheric measurements: will determine the role of atmospheric fine particles in climate change…