Winds become pollution's 'express trains'

[United Press International]

GREENBELT, Md., May 3 (UPI) -- NASA scientists in California
and Maryland have discovered that pollution can be carried thousands
of miles on airborne "express trains."
The scientists used data from two satellites and from
balloons carrying sensors. They discovered that at some times of
year half the ozone pollution over the South Atlantic appears to
have been carried from Asia.
Bob Chatfield, working at NASA's Ames Research Center,
Moffett Field, Calif. said, "Man-made pollution from Asia can flow
southward, get caught up into clouds, and then move steadily and
rapidly westward across Africa and the Atlantic, reaching as far as
Brazil."
The article by Chatfield and Anne Thompson, a researcher at
the Goddard Science Center in Greenbelt, Md., appears in a recent
issue of the American Geophysical Union's Geophysical Research
Letters.