ACE or IKE

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Ptarmigan
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ACE or IKE

#1 Postby Ptarmigan » Sat Jul 17, 2010 5:45 pm

Does Accumulated Cyclone Energy (ACE) truly measure how active a season is? I notice ACE values are all the same regardless how small or large a tropical cyclone is. A large hurricane like Katrina and Ike have the same ACE value than a small hurricane like Andrew and Charley get. On the flip side, ACE is easier to calculate, wind value in knots squared per 6 hour and add them all up and divide by 10,000.

On the other hand, we have Integrated Kinetic Energy (IKE). Coincidently, it also spells out Ike, which had one of the highest IKE values from a tropical cyclone. The formula is more complicated than ACE. Here is an article about IKE.
http://www.aoml.noaa.gov/hrd/ike/Files/ ... inal-1.pdf

An intense and large hurricane, like Katrina, is going to have a much higher IKE value than an intense and small hurricane, like Charley. It would be interesting to add all the IKE values, like we add ACE values.
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Chacor
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#2 Postby Chacor » Sat Jul 17, 2010 9:52 pm

I don't believe the size of tropical cyclones make a difference in whether or not a season is active, imo. A small TC a la Tracy 1974 can be as devastating as a large one.
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Re: ACE or IKE

#3 Postby Aslkahuna » Sun Jul 18, 2010 1:09 am

The 1992 season was, by any stretch of the imagination, a relatively inactive season-but try telling that to the people who went through Andrew in South Florida and Lousiana.

Steve
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Ptarmigan
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Re: ACE or IKE

#4 Postby Ptarmigan » Sun Jul 18, 2010 1:22 pm

Aslkahuna wrote:The 1992 season was, by any stretch of the imagination, a relatively inactive season-but try telling that to the people who went through Andrew in South Florida and Lousiana.

Steve


I came up with a formula that is based on peak strength, strength at landfall, how many times it makes landfall, how many people died; direct and indirect, including missing, and would like to include damage figures (normalized), and rainfall amount if known. I am working on that formula still.
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