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Latest Stratospheric sulfur aerosols Stories

aerosols climate
2014-08-07 03:00:05

Alan Buis, Jet Propulsion Laboratory and Kimm Fesenmaier, Caltech Of all the factors that influence Earth's changing climate, the effect that tiny particles in Earth's atmosphere called aerosols have on clouds is the least well understood. Aerosols scatter and absorb incoming sunlight and affect the formation and properties of clouds. Among all cloud types, low-level clouds over the ocean, which cover about one-third of the ocean's surface, have the biggest impact on the albedo, or...

Sunset Colors In Famous Paintings Used To Estimate Past Pollution Levels
2014-03-26 07:06:50

redOrbit Staff & Wire Reports - Your Universe Online The colors used by legendary artists of the past to depict a sunset could be used to estimate pollution levels in the atmosphere during bygone days, according to research published Tuesday in the open-access journal Atmospheric Chemistry and Physics. Lead author Christos Zerefos, a professor of atmospheric physics at the Academy of Athens in Greece, and his colleagues showed that paintings of famous artists reveal the ash and gas...

Global Warming Cooled Down By Volcanic Eruptions
2014-02-25 04:32:25

[ Watch the Video: Global Warming Cooled By Volcanoes ] Lee Rannals for redOrbit.com - Your Universe Online Researchers at Lawrence Livermore National Laboratory report they have found that volcanic eruptions in the early part of the 21st century have cooled the planet. The total heat content of the ocean, along with global-mean temperatures at the surface of the planet and in the troposphere have shown relatively little warming since 1998. This “slow-down” has been the topic of...

Geoengineering Earth's Climate
2013-12-18 10:37:49

Ranjini Raghunath for redOrbit.com - Your Universe Online Artificial clouds that reflect sunlight back into space. A StratoShield that spews sulfur dioxide particles into space like a volcano, cooling the planet’s surface. Microbial blooms that grow on iron injected into the ocean and trap carbon dioxide from the atmosphere. These are some of the latest ideas being tested to combat climate change in an emerging and hotly-debated field called geoengineering. Geoengineering involves use...

Global Distribution Of Sulfur Particles Following Large Eruptions Modeled By GEOMAR Researchers
2013-07-08 10:29:07

GEOMAR Helmholtz Centre for Ocean Research Kiel How severely have volcanoes contaminated the atmosphere with sulfur particles in past millennia? To answer this question, scientists use ice cores, among others, as climate archives. But the results differ, particularly in some major volcanic major events of the past, depending on whether the cores come from Antarctica or Greenland. Atmospheric scientists from the GEOMAR Helmholtz Centre for Ocean Research Kiel and the Max Planck Institute...

Sulfur Aerosol Particles And Climate Change
2013-05-15 04:51:08

Brett Smith for redOrbit.com - Your Universe Online A new study on cloud formation shows that climate change models may have underestimated the cooling effect of sulfur aerosol particles in the atmosphere. These aerosols mitigate greenhouse gases by reflecting sunlight. They also act as seeds for cloud condensation by allowing humidity to accumulate around them — forming droplets and then clouds. To investigate the role of sulfur aerosols in cloud formation and climate change,...

Plants Are Natural Air Conditioners
2013-04-29 10:10:18

Brett Smith for redOrbit.com - Your Universe Online It has long been understood that plants are able to mitigate the forces of climate change by absorbing carbon dioxide from the air. However, a new study adds another dimension to the role played by plants in curbing global warming by showing that they also“¯emit gases that assist in cloud formation and atmospheric cooling. According to the study, which was recently published in the journal“¯Nature...

Global Warming Slowed By Volcanic Sulfur Dioxide
2013-03-02 06:44:51

[ Watch the Video: What is Global Warming ] redOrbit Staff & Wire Reports - Your Universe Online Global warming was slowed between 2000 and 2010 because of sulfur dioxide spewed forth by volcanoes, researchers from the University of Colorado Boulder (CU-Boulder) and the National Oceanic and Atmospheric Administration (NOAA) claim in a new study. Some experts had blamed China and India for the phenomenon, as both countries increased their industrial sulfur dioxide emissions by an...

Volcano Controversy Settled Using Chemistry ‘Trick’
2013-02-12 15:01:41

Brett Smith for redOrbit.com - Your Universe Online Volcanic eruptions have been known to cause global cooling, although the extent of this cooling has been a topic of scientific controversy. Now a team of atmosphere chemists from the Tokyo Institute of Technology and the University of Copenhagen has devised a method for determining which historical cooling periods are the results of volcanic eruptions. When a large volcano erupts, it can propel gases high into the stratosphere where...

OH Radicals Causes Aging Of Organic Aerosols
2012-10-05 10:17:23

Climate models need to be updated Atmospheric aerosol particles have a significant effect on climate. An international team of researchers has now discovered that a chemical process in the atmosphere called aging determines to a major extent the concentration and the characteristics of aerosol particles. To date, this aspect has not been accounted for in regional and global climate models. In the Muchachas [Multiple Chamber Aerosol Chemical Aging Experiments] project, the team has not...


Word of the Day
humgruffin
  • A terrible or repulsive person.
Regarding the etymology of 'humgruffin,' the OED says (rather unhelpfully) that it's a 'made-up word.' We might guess that 'hum' comes from 'humbug' or possibly 'hum' meaning 'a disagreeable smell,' while 'gruffin' could be a combination of 'gruff' and 'griffin.'