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NCAR analysis shows widespread pollution from 2004 wildfires

he extent to which human and natural activities contribute to atmospheric concentrations of the gas.

Wildfires in Alaska and western Canada were particularly intense in the summer of 2004, largely because of unusually warm and dry weather. To quantify carbon monoxide emissions from the fires, the research team used a remote sensing instrument known as MOPITT (Measurements of Pollution in the Troposphere) that is operated by NCAR and the University of Toronto and flown on NASA's Terra satellite. The scientists simulated the transport of the pollutants emitted by the fires and the resulting production of ozone with an NCAR computer model called MOZART (Model for Ozone and Related Chemical Tracers).

The team confirmed its results by using numerical techniques to compare simulated concentrations of carbon monoxide in the atmosphere with measurements taken by MOPITT. The researchers were able to get further confirmation by analyzing data from aircraft-mounted instruments that were taking part in a field project over North America and Europe.

Pfister says the team is continuing to look at data taken last year at observing stations as far away as the Azores in order to track the movement of carbon monoxide and ozone from the wildfires. As a follow-up, she and other scientists plan to use a similar combination of observations, modeling, and numerical techniques to look at both natural and human-related emissions of carbon monoxide in South America.


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Source:National Center for Atmospheric Research/University Corporation for Atmospheric Research


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