Smoke across East and Northwest
The EPA AQI
loop, below right, shows a swath of Moderate AQIs
stretching west from the Appalachians, past the Great Lakes,
and into Texas. Parts of this area are also crossing the
Appalachians and into the coastal areas of New England,
the Mid-Atlantic, and the Southeast. There is also Moderate
across the Pacific Northwest and Pacific Southwest,
reaching into Unhealthy for Sensitive Groups in southeast
Oregon and north-central California.
Terra image below on the right shows elevated AODs
in the Pacific Northwest and northwest of the Great Lakes
that may be related, but much of the rest of the regions of
lower air quality are cloud-covered.
The HMS imagery, below left shows light to medium smoke over
the Pacific Northwest, Pacific Southwest, Rocky Mountains,
and Great Lakes, with additional light smoke over New England,
the Mid-Atlantic, the Southeast, and the Mississippi Valley.
These plumes of smoke likely explain the poor air quality in
those regions. Today lidar
timeseries shows a high concentration of particle pollution near the surface due to high pressure system over the region that is limiting ventilation in the boundary layer. During the daylight hours, times after 10:00 UTC (6:00 am local time) the boundary layer rose up to 2 km.
Posted by John Sullivan at August 5, 2014 11:59 PM