Today, serendipity in the whirlwind. The University of Houston's College of
Engineering presents this series about the machines that make our civilization
run, and the people whose ingenuity created them.
This world is sometimes more odd than we imagine.
When people ask me how I get program ideas, I say that I follow threads of context.
Well, a while ago I XeroXed some pages about a little-known 19th-century meteorologist
-- William Ferrel.
That was before Hurricane Ike disrupted the Gulf Coast. After Ike, I finally took
those pages off to lunch and read about Ferrel's work on tides and cyclonic action.
Suddenly, he seemed very timely. Then the Internet revealed that the National
Oceanographic and Atmospheric Administration, NOAA, had given his name to a
small ship, The Ferrel. Perhaps he was not so obscure after all.
That evening we went to a play with a geophysicist whose company does subsea
acoustic oil exploration in the Gulf. Before the curtain, I asked if he'd heard
of Ferrel. He said,
"Oh yes. I have a ship named after him -- I bought it after NOAA decommissioned it in 2002."
"You what!" I said. (After all, you might find
coincidences like that at the movies -- but not in real life.)
He went on to say, "I try to name all my ships after great scientists, but this
one already had a fine name." So I guess you and I need to find out what
this Ferrel actually did. He was born in remote south central Pennsylvania, in 1817.
His family moved down into West Virginia where he attended a one-room schoolhouse.
Ferrel was shy, very smart, and he hungered to learn about science. He learned
enough to become a school teacher himself; then he taught until he'd earned enough
to pay for college. He finally graduated from Bethany College in West Virginia.
After that, he went back to teaching while he studied the works of Newton and LaPlace.
And he realized that LaPlace's theory of tidal action was oversimplified. LaPlace
had ignored friction. Ferrel included friction and found that it not only affects
tides, but also constantly slows Earth's rotation slightly.
Ferrel created an early analogue computer that could predict tidal motions.
Then he saw that his methods for analyzing tides could also be applied to atmospheric
movement. He showed that, hot air rising while Earth rotates will induce a secondary
acceleration -- a so-called Coriolis acceleration. That's what creates the rotational
motions of winds. He'd shown us how cyclonic storms work.
Prominence finally caught up with Ferrel. He took a high post with the Coast Survey.
He was made a member, not only of the National Academy, but of several European academies
as well. He truly was a giant in American science a century-and-a-half ago.
Now, thanks to Ferrel, when hurricanes come, we can predict them far enough ahead to seek
cover. We have a basis for deciding to evacuate or to hunker down. And my friend's ship,
the Ferrel, served as a refuge to its crew's families while Ike battered the
Louisiana coast. It proved to be a sturdy safe haven against the very winds that its
namesake had shown us how to anticipate.
I'm John Lienhard at the University of Houston,
where we're interested in the way inventive minds
H. L. Burstyn, Ferrel, William. Dictionary of Scientific Biography,
C. C. Gillispie, ed., Vol. IV (New York: Charles Scribner's Sons, 1975): pp. 590-592.
I am most grateful to Alton L. (Jerry) Warren, CEO of Reservoir Geophysical Corporation,
for his counsel -- and for having rescued the fine NOAA ship Ferrel from a scrap
yard in Norfolk, VA, where its distinguished career as a research vessel would otherwise
have ended. Warren has continued to use the vessel in the service of government and
university oceanographic research. The image of William Ferrel is courtesy of Wikipedia
Commons. Warren kindly provided the three ship photos.
For a detailed account of The Ferrel and its service as a NOAA vessel, see:
The Ferrel refurbished and reoutfitted
The Ferrel in dry dock, having just received a new coat of paint
The Engines of Our Ingenuity is
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