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MaggieL · 05-19-2002, 10:42 PM

Anybody who spends much time in a light aircraft around a metro area has *seen* the *permanent" smog layer that caps most cities. It tends to accumulate at the top of the connvective cells that form because of difference of ground temperature, such as cultivated land vs. forrest, or grasslands vs. paved parking lots, or even just rivers vs. dry land.

The air below this layer--typically tops out between 3,000 and 4,000 feet--is quite visibly *dirty*; it's a brownish color, and the airabove it is noticable clearer and bluer.

Even though I'm not working and have zero income, today I broke a one-year hiatus in flying, went up with a flight instructor, and restablished my right to fly and carry passengers.

It feels really good. :-)

05-19-2002, 10:42 PM	#2
MaggieL in the Hour of Scampering Join Date: Jan 2001 Location: Jeffersonville PA (15 mi NW of Philadelphia) Posts: 4,060	Anybody who spends much time in a light aircraft around a metro area has seen the permanent" smog layer that caps most cities. It tends to accumulate at the top of the connvective cells that form because of difference of ground temperature, such as cultivated land vs. forrest, or grasslands vs. paved parking lots, or even just rivers vs. dry land. The air below this layer--typically tops out between 3,000 and 4,000 feet--is quite visibly dirty*; it's a brownish color, and the airabove it is noticable clearer and bluer. Even though I'm not working and have zero income, today I broke a one-year hiatus in flying, went up with a flight instructor, and restablished my right to fly and carry passengers. It feels really good. :-) __________________ "Neither can his Mind be thought to be in Tune,whose words do jarre; nor his reason In frame, whose sentence is preposterous..."