Original: ACE is , broadly speaking , a measure of the power of the hurricane multiplied by the length of time it existed , so storms that last a long time ( such as Bertha ) as well as particularly strong hurricanes ( such as Ike ) , have high ACEs .
Simplified: ACE is a measure of the power of the hurricane multiplied by the length of time it existed , so storms that last a long time , as well as strong hurricanes , have high ACEs .