Accumulated cyclone energy

Accumulated cyclone energy (ACE) is a measure used by the National Oceanic and Atmospheric Administration (NOAA) to show the activity of each tropical cyclones and entire tropical cyclone seasons, particularly the Atlantic hurricane seasons. It uses an estimation of the energy used by a tropical system over its lifetime and is calculated in every six hours.Bell, Gerald D., Halpert, Michael S., Schnell, Russell C., Higgins, R. Wayne, Lawrimore, Jay, Kousky, Vernon E., Tinker, Richard, Thiaw, Wasila, Chelliah, Muthuvel, Artusa, Anthony. Climate Assessment for 1999. Bulletin of the American Meteorological Society 2000 81: 1328-1328

References

Other websites
 NOAA ACE by year from 1851
 National Climatic Data Center - Atlantic Basin 2004 Accumulated Cyclone Energy (ACE) Index 
 National Climatic Data Center — Atlantic Basin 2005 Accumulated Cyclone Energy (ACE) Index 
 2004 Pacific NW Typhoon Season ACE pdf 
 Global Tropical Cyclone Best Track Database 
 Hurricane Metrics

Category:Tropical cyclones
Category:Meteorology