January 14, 2014

Code Red in Pacific Northwest due to PM 2.5

The first image below, courtesy NOAA HMS, shows the fire locations across the United States. The red dots correspond to active fires, and the grey areas are plumes. The major concentration of fires is in the Midwest region, Texas and sparse fires in the Northwest and Southwest regions. Although there is a large concentration of fires, there is little smoke being picked up by HMS. The next image shows the retrieved AOD image for the day, courtesy GASP EAST. The image shows an increase in AOD in the Southeast and Texas regions, which most likely corresponds to some of the local fires. Additionally, there is an increase in AOD in the California Baja region, which may be due to local dust blowing (described in the past few days posts).

The next image, courtesy EPA AIRNOW, shows the AQI values the Pacific northwest region. Southern Oregon and Northern California reached code red values at the surface due to PM 2.5. This may be from local fires and residential wood fires. The next image, courtesy OMI NRT, shows the retrieved NO2 column for the troposphere. This image shows a large amount of NO2 in this same region as the elevated AQI values in the Northern Pacific Northwest region as well Central California. This enhancement in column NO2 shows a correlation with the increase in PM 2.5 at the surface.

Posted by John Sullivan at January 14, 2014 6:02 PM
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