The phrase "accumulated cyclone" refers to the total energy generated by a cyclone over its lifetime. It measures how powerful and destructive the storm has been by adding up the energy it released. Full definition
It will also be interesting to see plaintiffs explain this graph of accumulated cyclone energy in the light of their theory that man - made global warming is increasing hurricane strengths and frequencies (ACE is a sort of integration of hurricane and tropical storm strengths over time). (climate-skeptic.com)
It generated the most accumulated cyclone energy in a 24 - hour period. (thebalance.com)
All told through June 27, 2011, overall global accumulated cyclone energy and frequency has settled into a period of record inactivity. (policlimate.com)