What is the term ACE mean
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What is the term ACE mean
In the 2008 poll some people were trying to guess what the ACE will be for the upcoming hurricane season.I remember it being explained last year in a thread. I don't remember what it stands for or what it means.
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Accumulated Cyclone Energy; a measure of the duration and intensity of storms. Given in ten thousand knots squared. At each full advisory or best-track point when a storm is ABOVE or EQUAL tropical storm strength (34 kt), the advisory intensity is taken and squared, then divided by ten thousand.
Therefore, a storm that lasts for one advisory as a weak TS (35 kts) will have an ACE of 35*35/10,000 = 1225/10,000 = 0.1225, while a long-lasting storm or intense hurricane will have higher ACE values.
Therefore, a storm that lasts for one advisory as a weak TS (35 kts) will have an ACE of 35*35/10,000 = 1225/10,000 = 0.1225, while a long-lasting storm or intense hurricane will have higher ACE values.
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- senorpepr
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To piggy-back with an example: For instance, Tropical Storm Barry's best-track intensities were 30kt, 40kt, 50kt, 45kt, 40kt, and 30kt. We're only looking at advisories/best-track points at which the storm is at or above 35kt and is fully tropical. That will leave us with 40kt, 50kt, 45kt, and 40kt.
40^2/10000=0.1600
50^2/10000=0.2500
45^2/10000=0.2025
40^2/10000=0.1600
That indicates that Barry's ACE total was 0.7725 10^4/kt^2.
As a mentioned earlier, if a cyclone is sub-tropical, it does not earn an ACE score. Obviously, the stronger the storm, the quicker it racks up ACE.
40^2/10000=0.1600
140^2/10000=1.9600
Get a long-tracked, strong storm like Hurricane Ivan, and you're looking at an ACE of 70.4 10^4/kt^2.
That compares to Katrina's 20 10^4/kt^2 and Wilma's 39.01 10^4/kt^2.
40^2/10000=0.1600
50^2/10000=0.2500
45^2/10000=0.2025
40^2/10000=0.1600
That indicates that Barry's ACE total was 0.7725 10^4/kt^2.
As a mentioned earlier, if a cyclone is sub-tropical, it does not earn an ACE score. Obviously, the stronger the storm, the quicker it racks up ACE.
40^2/10000=0.1600
140^2/10000=1.9600
Get a long-tracked, strong storm like Hurricane Ivan, and you're looking at an ACE of 70.4 10^4/kt^2.
That compares to Katrina's 20 10^4/kt^2 and Wilma's 39.01 10^4/kt^2.
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Re: What is the term ACE mean
Here:
http://en.wikipedia.org/wiki/Talk:2007_ ... /ACE_calcs
and here
http://en.wikipedia.org/wiki/Talk:2007_ ... /ACE_calcs
Althought it's Wikipedia, so it's probably out of date
http://en.wikipedia.org/wiki/Talk:2007_ ... /ACE_calcs
and here
http://en.wikipedia.org/wiki/Talk:2007_ ... /ACE_calcs
Althought it's Wikipedia, so it's probably out of date

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Re: What is the term ACE mean
HurricaneRobert wrote:Althought it's Wikipedia, so it's probably out of date
It is not out of date. Please read things thoroughly before making such statements.
Also, to brush up on my C# programming skills, I created a program which can give you any ACE value for any number entered. Here's the most common values:
kt = ACE
---------
35 = 0.1225
40 = 0.1600
45 = 0.2025
50 = 0.2500
55 = 0.3025
60 = 0.3600
65 = 0.4225
70 = 0.4900
75 = 0.5625
80 = 0.6400
85 = 0.7225
90 = 0.8100
95 = 0.9025
100 = 1.0000
105 = 1.1025
110 = 1.2100
115 = 1.3225
120 = 1.4400
125 = 1.5625
130 = 1.6900
135 = 1.8225
140 = 1.9600
145 = 2.1025
150 = 2.2500
155 = 2.4025
160 = 2.5600
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Re: What is the term ACE mean
RattleMan wrote:It is not out of date. Please read things thoroughly before making such statements.
Uh, yeah it is.
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Re: What is the term ACE mean
HurricaneRobert wrote:RattleMan wrote:It is not out of date. Please read things thoroughly before making such statements.
Uh, yeah it is.
EDIT: Never mind, I was only looking at the Atlantic. I'll get on updating the Pacific.
EDIT 2: The Eastern Pacific is now finished.
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Re:
KWT wrote:wow thats interesting is there anyway you could upload such a program?
Sure. See here:
http://www.sonicfighters.com/rattleman/ ... Calcs.html
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