January 31, 2014

Moderate AQIs across US, PM2.5 the main culprit

Looking at the NOAA HMS Smoke and Fire Product (top left), the small red dots indicate a groups of fires in the Southeast, Great Plains, and California. While no notable smoke plumes were seen, the MODIS Terra image (top right) shows raised AOD values off of the coast of California as well as near the Nebraska/Iowa border, both corresponding to HMS fires. Much of the rest of the US, however, has cloud cover which inhibits data retrieval.

The EPA AIRNow combined AQI loop (bottom left) details moderate AQIs across the US with patches of USG and even unhealthy AQIs throughout the day. Much of these raised AQIs were found near the coasts, although oddly enough the highest two readings for today occurred in El Paso, TX (158) and North Pole, AK (156). The OMI NRT tropospheric NO2 column (bottom right) illustrates elevated NO2 in the Northeast, part of the Midwest, and the Western portion of California that the satellite could pick up. These NO2 concentrations could be contributing to the moderate AQIs in these respective areas, as PM2.5 was the main component of the aerosol concentration today throughout the US.

Posted by Graham Antoszewski at January 31, 2014 7:53 PM
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