http://www.sciencerecorder.com/news/researchers-volcanic-eruptions-offset-
recent-global-warming/
Erupting volcanoes offset recent Earth warming, according to a team led by
the University of Colorado at Boulder. Researchers arrived at this
conclusion after searching for clues about why Earth did not warm as much
as climatologists expected between 2000 and 2010.
Lead study author Ryan Neely said that the study�s findings take some of
the pressure off of India and China, two countries that are believed to
have increased their industrial sulfur dioxide emissions by approximately
60 percent from 2000 to 2010 through coal burning.
According to the United States Environmental Protection Agency, the
biggest sources of sulfur dioxide emissions are from fossil fuel
combustion at power plants (73 percent) and other industrial facilities
(20 percent). Smaller sources of sulfur dioxide emissions include trains,
large ships and some industrial processes. Sulfur dioxide emissions are
associated with a number of negative effects on the respiratory system.
Neely, in a statement released by the university, noted that tiny amounts
of sulfur dioxide emissions from Earth�s surface eventually rise 12 to 20
miles into the stratospheric aerosol layer of the atmosphere, where
chemical reactions generate sulfuric acid and water particles that reflect
sunlight away from the Earth and back to space.
The study�s findings reveal that it is emissions from small to moderate
volcanoes that have been offsetting recent Earth warming, according to
Neely, a researcher at the Cooperative Institute for Research in
Environmental Sciences.
According to the U.S. Geological Survey, the effects of sulfur dioxide
emissions on the environment depend on several factors, including the
amount of gas a volcano emits into the atmosphere, whether the gas travels
into the troposphere or stratosphere and the regional or global wind and
weather pattern that moves the gas.
The motivation for the study was a desire to resolve conflicting results
of two recent studies on the origins of the sulfur dioxide in the
stratosphere. One study showed that aerosol increases in the stratosphere
may have come from India and China�s rising sulfur dioxide emissions,
while the other study revealed that moderate volcanic eruptions were to
blame.
The new study looks at long-term measurements of changes in the
stratospheric aerosol layer�s �optical depth,� which is a measure of
transparency, according to Neely. Since 2000, the optical depth in the
stratospheric aerosol layer has increased by approximately four to seven
percent.
Study co-author Brian Toon of the University of Colorado at Boulder said
that scientists must spend more time examining the impact of small and
moderate volcanic eruptions when attempting to learn about changes in the
Earth�s climate. He added that �overall� these eruptions will not counter
the greenhouse effect. While the emissions of volcanic gases increase and
decrease, greenhouse gas emissions due to human activity are rising.
The researchers combined the Whole Atmosphere Community Climate Model with
a second model, the Community Aerosol and Radiation Model for Atmosphere.
The combined use of these two computer models produced the new results
from which the researchers drew their conclusions.
According to Neely, the researchers used a supercomputer on campus to
process 10 years of atmospheric activity linked to both coal-burning
activities in Asia and to emissions by volcanoes around the world. They
ran this simulation several times. The team was able to separate coal-
burning pollution in Asia from aerosol contributions from moderate
volcanic eruptions. According to Neely, each computer �run� took
approximately a week to complete.
The researchers warn that the 10-year climate data sets collected by this
study are not extensive enough to identify climate change trends. Neely
added that the study provides valuable information for those looking into
the �sources of decadal climate variability,� in addition to the global
impact of local pollution and the role of volcanoes.
According to Toon, larger volcanoes can have an even bigger effect than
small and moderate volcanoes. He noted that when Mount Pinatubo erupted in
1991, it sent millions of tons of sulfur dioxide into the atmosphere,
cooling the planet for the next several years.
--
Barack Obama, reelected by the dumbest and most fearful people in the
history of the United States of America.
Eric Holder, racist black murdering United States Attorney General, still
has his job.
Nancy Pelosi, Democrat criminal, accessory before and after the fact to
improper vetting of Barry Soetoro aka Barack Hussein Obama, a confirmed
felon using SSAN 042-68-4425, belonging to a dead man.
Obama ignored the brutal killing of an American diplomat in Benghazi, then
relieved American military officers who attempted to prevent said murder
in order to cover up his own ineptness.
Obama continues his goal of disarming America after known mentally
disturbed liberal Adam Peter Lanza killed 20 school children and 6 adults
in Sandy Hook Connecticut on December 14, 2012. Every single liberal
inspired and authored gun control law in existence failed to prevent this
tragedy.
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