Aerosol
hideTechnically, an aerosol is a suspension of fine solid particles or liquid droplets in a gas. Examples are smoke, oceanic haze, air pollution, smog and CS gas. In general conversation, aerosol usually refers to an aerosol spray can or the output of such a can. The word aerosol derives from the fact that matter "floating" in air is a suspension (a mixture in which solid or liquid or combined solid-liquid particles are suspended in a fluid). To differentiate suspensions from true solutions, the term sol evolved—originally meant to cover dispersions of tiny (sub-microscopic) particles in a liquid. With studies of dispersions in air, the term aerosol evolved and now embraces both liquid droplets, solid particles, and combinations of these.
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News tagged with aerosols
New approach to emissions makes climate and air quality models more accurate, major study finds
Space & Earth / Earth Sciences
Dec 10, 2009 |
3.9 / 5 (7) |
1
It's no secret that the emissions leaving a car tailpipe or factory smokestack affect climate and air quality. Even trees release chemicals that influence the atmosphere. But until now, scientists have struggled to know where ...
Better-than-new LIDAR provides 24/7 atmospheric aerosol data
Space & Earth / Earth Sciences
Dec 08, 2009 |
5 / 5 (1) |
0
(PhysOrg.com) -- A team of researchers from eight institutions led by Pacific Northwest National Laboratory has solved a software and hardware problem that had perplexed scientists studying atmospheric aerosols ...
Climate studies to benefit from 12 years of satellite aerosol data
Space & Earth / Earth Sciences
Nov 10, 2009 |
1 / 5 (1) |
0
Aerosols, very small particles suspended in the air, play an important role in the global climate balance and in regulating climate change. They are one of the greatest sources of uncertainty in climate change ...
Do dust particles curb climate change?
Space & Earth / Earth Sciences
Oct 06, 2009 |
4.6 / 5 (5) |
4
(PhysOrg.com) -- A knowledge gap exists in the area of climate research: for decades, scientists have been asking themselves whether, and to what extent man-made aerosols, that is, dust particles suspended ...
Aircraft emissions could influence climate change through cloud formation
Space & Earth / Earth Sciences
Sep 28, 2009 |
2.6 / 5 (8) |
2
(PhysOrg.com) -- Aircraft emissions can affect the properties of cirrus clouds, contributing to climate change. This was a key finding from PNNL scientist Dr. Xiaohong Liu and his colleagues from a recent ...
Has northern-hemisphere pollution affected Australian rainfall?
Space & Earth / Earth Sciences
Aug 26, 2009 |
4 / 5 (1) |
0
New research announced at the International Water in a Changing Climate Science Conference in Melbourne 24-28 August, implicates pollution from Asia, Europe and North America as a contributor to recent Australian rainfall ...
Missing link of cloud formation
Chemistry / Analytical Chemistry
Aug 11, 2009 |
4 / 5 (9) |
0
The discovery of an unknown hitherto chemical compound in the atmosphere may help to explain how and when clouds are formed. The discovery of the so called dihydroxyepoxides (an aerosol-precursor), is reported ...
Researchers show how organic carbon compounds emitted by trees affect air quality
Aug 06, 2009 |
4 / 5 (9) |
6
A previously unrecognized player in the process by which gases produced by trees and other plants become aerosols—microscopically small particles in the atmosphere—has been discovered by a research team led ...
Cosmic meddling with the clouds by seven-day magic
Space & Earth / Earth Sciences
Aug 01, 2009 |
4.8 / 5 (21) |
9
Billions of tonnes of water droplets vanish from the atmosphere, as if by magic, in events that reveal in detail how the Sun and the stars control our everyday clouds. Researchers of the National Space Institute in the Technical ...
Sulfate lens enhances climate warming properties of atmospheric soot
Space & Earth / Earth Sciences
Jun 29, 2009 |
3.4 / 5 (9) |
3
Particulate pollution thought to be holding climate change in check by reflecting sunlight instead enhances warming when combined with airborne soot, a new study has found.
Salt block unexpectedly stretches in new experiments
Nanotechnology / Nanomaterials
Jun 24, 2009 |
4.6 / 5 (7) |
4
To stretch a supply of salt generally means using it sparingly.
The mystery of particles
Space & Earth / Earth Sciences
Jun 19, 2009 |
4 / 5 (5) |
2
Particles cool down the climate, but to which extent? This has remained an unanswered question for scientists. A new article in Science by Gunnar Myhre at CICERO, Norway, brings the scientific community a step closer to sol ...
Summer haze has a cooling effect in southeastern United States
Space & Earth / Earth Sciences
May 18, 2009 |
2.4 / 5 (8) |
3
(PhysOrg.com) -- Global warming may include some periods of local cooling, according to a new study by researchers at the University of California, Berkeley. Results from satellite and ground-based sensor data show that sweltering ...
Aerosols May Drive a Significant Portion of Arctic Warming
Space & Earth / Earth Sciences
Apr 08, 2009 |
4.3 / 5 (19) |
15
(PhysOrg.com) -- Though greenhouse gases are invariably at the center of discussions about global climate change, new NASA research suggests that much of the atmospheric warming observed in the Arctic since ...
New aerosol observing technique turns gray skies to blue (w/Video)
Space & Earth / Earth Sciences
Mar 12, 2009 |
5 / 5 (1) |
0
(PhysOrg.com) -- Tiny, ubiquitous particles in the atmosphere may play a profound role in regulating global climate. But the scientists who study these particles -- called aerosols -- have long struggled to ...
