April 15, 2014

Moderate AQI across the Southwestern U.S. Concentrated Fires Great Plains.

Moderate air quality across the Pacific Southwest, Southeast, Plains States, and Rocky Mountain States, with areas of Unhealthy for Sensitive Groups in western South Carolina and southern California, as seen in the EPA Airnow loop below left. HMS imagery, below right, shows fires around the patches in the Great Plains and Florida, as well as smoke plumes off the Texas coast and the Yucatan Peninsula.

Unfortunately, the forecast shows the wind coming from the southeast by tomorrow afternoon, bringing the Texas plumes back over land.

The NRL NAAPS model, below left, indicates elevated sulfate in the southeast and dust in the southwest and Plains as potential culprits for the sub-optimal AQI there. OMI tropospheric NO2 points to nitrates as a possibly more convincing candidate for the cause of the Moderate AQI in the southwest.

Posted by John Sullivan at April 15, 2014 11:43 PM
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