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[Phys-L] Re: Hurricanes



Hi,
I think the dissipation of a hurricane is mostly
from being cut off from its source of energy which
is the warm water. This water evaporates, goes
up, condenses, and comes down. The associated
convention "sucks" air into the middle and this
drives the rotation and the strong winds. Once new
water is removed from the cycle, much of the
convection slows, and the winds drop.

The only suggestion on dissipating hurricanes
that I have seen, that did not get instantly shot
down, was a huge oil slick that would block the
source of new water.

Thanks
Roger

**************************************************************
Ludwik Kowalski wrote:

A mass of air gains kinetic energy at the expense of thermal energy
over the ocean. After hitting the land the kinetic energy is rapidly
dissipated due to "friction." That is a very simplified description of
the hurricane phenomenon. But is it oversimplified to the point of
being wrong? In other words what is the main cause of the rapid
decrease of destructiveness, friction against the land or not being in
contact with the ocean (a supply of thermal energy)? Speculations about
ways of causing hurricanes to loose kinetic energy, before the land is
hit, might have some pedagogical value at this time. Take advantage of
this opportunity. Promote inventiveness and discuss student's proposals
in classes.

Ludwik Kowalski
Let the perfect not be the enemy of the good.
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