Recent historically low global tropical cyclone activity
Article first published online: 20 JUL 2011
Copyright 2011 by the American Geophysical Union.
Geophysical Research Letters
Volume 38, Issue 14, July 2011
How to Cite
2011), Recent historically low global tropical cyclone activity, Geophys. Res. Lett., 38, L14803, doi:10.1029/2011GL047711.(
- Issue published online: 20 JUL 2011
- Article first published online: 20 JUL 2011
- Manuscript Accepted: 7 JUN 2011
- Manuscript Revised: 6 JUN 2011
- Manuscript Received: 14 APR 2011
- climate variability;
- tropical cyclones
 Tropical cyclone accumulated cyclone energy (ACE) has exhibited strikingly large global interannual variability during the past 40-years. In the pentad since 2006, Northern Hemisphere and global tropical cyclone ACE has decreased dramatically to the lowest levels since the late 1970s. Additionally, the global frequency of tropical cyclones has reached a historical low. Here evidence is presented demonstrating that considerable variability in tropical cyclone ACE is associated with the evolution of the character of observed large-scale climate mechanisms including the El Niño Southern Oscillation and Pacific Decadal Oscillation. In contrast to record quiet North Pacific tropical cyclone activity in 2010, the North Atlantic basin remained very active by contributing almost one-third of the overall calendar year global ACE.