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Measuring Hurricanes and Cyclones
Transcript
of keynote speech by Donald Burfitt-Dons (continued)
In March 2004 the first ever hurricane to cross into Brazil made landfall
when Cyclone Katarina crossed the northern coast line. Katarina was
a full Cat 2 hurricane on the Saffir-Simpson Scale which you should
have been given in your hand outs.
Although there are several scales for measuring hurricanes or cyclones
these are the most commonly used and today I’d suggest using the
Saffir Simpson one for clarity hopefully. You can see that the Beaufort
scale pegs out at Hurricane strength which on both scales starts at
64 knots. Other graduations have been added and are in use in some countries,
but the system is all a bit dated. Continued Donald
Burfitt-Dons talks about cyclones outside the tropics
the
planet's way of recycling heat energy/
the first Brazilian hurricane/cyclones
outside the tropics/how
the GWA monitors hurricane activity/the
rising tropopause/ETC activity
since the 50s/l ETC activity
since 1990/ the effect of an ETC
on London /how superwinds form/
the impact of ETCs on aircraft/data
from 21 recent storms/ UK as a breeding
ground for tornadoes/
the impact on the insurance industry/
future implications /threat
of ETCs to Europe and UK
