Had a moment and thought I would try to explain further....
So if we concentrate on Beta reads picked up in filters you
first have to understand that a simple gm won't
pick up the overall increase because the fine particulates
simply "slip past" these devices. The epa beta stations gather
them into filters so they can be read as they build up and studied
further at filter change time, similar to our lungs.
So another good question is why we saw these reads in spades
in Charlotte NC and less in, lets say Illinois...
Simple...
The jet stream simply pushed them over the northerly stations
that day and on to Charlotte shortly thereafter.
Here's a example. The red would stand for high speed winds
and the blue would represent slower (eddied) winds.
Attachment:
jetstream.jpg [ 371.39 KiB | Viewed 103361 times ]
So many of these particles simply flew over the north as they
remained high in the atmosphere and were deposited at the
slower points along the way...
That would put Charlotte in the "bulls eye" and would explain the
super high readings on the 1st and 2nd. Now appearing more
northerly as the wind speeds are slower up north at the moment.
Write be back if you have any questions or comments.
All are welcome!