Stories tagged sulphur dioxide

It is estimated that two-thirds of sulfur dioxide (SO2) air pollution in North America comes from coal power plants. In a recent scientific article published in Geophysical Research Letters, a team of scientists have confirmed that SO2 levels in the vicinity of U.S. coal power plants have fallen by nearly 50% since 2005. .Mean SO2 values for 2005-2007
Mean SO2 values for 2005-2007Courtesy NASA
This finding, using satellite observations, confirms ground-based measurements of declining SO2 levels. In many parts of the world, ground-based monitoring does not exist or is not extensive; therefore, the Ozone Monitoring Instrument (OMI) on the Aura satellite could potentially measure levels of harmful emissions in regions of the world where reliable ground monitoring is unavailable..Mean SO2 values for 2008-2010
Mean SO2 values for 2008-2010Courtesy NASA
Key: Yellow to violet colors correspond to statistically significant enhancements in SO2 pollution in the vicinity of the largest SO2 emitting coal-burning power plants indicated by the black dots.
Key: Yellow to violet colors correspond to statistically significant enhancements in SO2 pollution in the vicinity of the largest SO2 emitting coal-burning power plants indicated by the black dots.Courtesy NASA

Previously, space-based SO2 monitoring was limited to plumes from volcanic eruptions and detecting anthropogenic emissions from large source regions as in China. A new spatial filtration technique allows the detection of individual pollution sources in Canada and the U.S.

"What we’re seeing in these satellite observations represents a major environmental accomplishment," said Bryan Bloomer, an Environmental Protection Agency scientist familiar with the new satellite observations. "This is a huge success story for the EPA and the Clean Air Interstate Rule," he said.

Article: NASA Satellite Confirms Sharp Decline In Pollution From US Coal Power Plants