Now,
research led by study author Ryan Neely, conducted as part of his doctoral
thesis at CU, has shown that global warming from 2000 to 2010 was tamped down
by sulfur dioxide from volcanic eruptions, not industrial emissions in China
and India, where such activity has greatly increased in recent years. The
10-year window addressed by the study did not see massive activity on the scale
of Mount Pinatubo in the Philippines, which erupted in 1991 in the
second-largest volcanic event of the 20th century. Still, there was sufficient
volcanic activity in the 2000s from the tropics to Alaska that made an impact
in the stratosphere
The new research piggybacks on a 2011 study
led by Susan Solomon, a former scientist at the National Oceanic and
Atmospheric Administration who is now at the Massachusetts Institute of
Technology, which showed that stratospheric aerosols -- without isolating their
source -- offset about one-quarter of the greenhouse-effect warming of Earth in
the past 10 years. The fact that the emissions from industrial activity on the
other side of the planet is not affecting temperature fluctuations tied to
particulates in the stratosphere, Neely said, does not mean that all those
human-caused emissions are good for the environment.http://www.sciencedaily.com/releases/2013/03/130301123048.htm Ryan Lindquist 4:04 PM 03/08/13
.
No comments:
Post a Comment