Accumulated cyclone energy (ACE) is a measure used by various agencies including the National Oceanic and Atmospheric Administration (NOAA) and the India Meteorological Department to express the activity of individual tropical cyclones and entire tropical cyclone seasons. It uses an approximation of the wind energy used by a tropical system over its lifetime and is calculated every six hours. The ACE of a season is the sum of the ACEs for each storm and takes into account the number, strength, and duration of all the tropical storms in the season. The highest ACE calculated for a single storm is 82, for Hurricane/Typhoon Ioke in 2006....And from the keeper of the ACE, Ryan Maue, Climatlas, July 21:
2020 Accumulated Cyclone Energy [ACE]
| Basin | Current YTD | Normal YTD | % of Normal YTD | Yearly Climo* | 2018** |
|---|---|---|---|---|---|
| Northern Hemisphere | 41.5375 | 105 | 39% | 568 | 821 |
| Western N Pacific | 7.4425 | 61 | 12% | 302 | 356 |
| Eastern + Cent N Pac | 6.835 | 30 | 22% | 138 | 320 |
| North Atlantic | 8.04 | 6 | 134% | 104 | 131 |
| North Indian | 19.22 | 7 | 274% | 18 | 37 |
| Southern Hemisphere | 108.925 | N/A | N/A | N/A | 198 |
| Global | 150.4625 | 277 | 54% | 771 | 1011 |
*Climatology from historical 1981-2010 Tropical cyclone best track datasets
**Preliminary values from real-time ATCF advisories and will become final when best-tracks are available from JTWC and NHC after post-season analysis Small differences have been found in previous years between real-time and best-track ACE.
....MUCH MORE
