Recent historically low global tropical cyclone activity

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,...

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Bibliographic Details
Published in:Geophysical research letters 2011-07, Vol.38 (14), p.n/a
Main Author: Maue, Ryan N.
Format: Article
Language:English
Subjects:
Atmospheric circulation
Atmospheric sciences
Basins
Climate
Climate change
Climate science
climate variability
Cyclones
Earth
Earth sciences
Earth, ocean, space
El Nino
ENSO
Evolution
Exact sciences and technology
General circulation models
Geophysics
hurricanes
Marine
Meteorology
Oscillations
Southern oscillation
tropical cyclones
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Summary: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. Key Points In the past 5‐years, global tropical cyclone activity has decreased markedly Tropical cyclone ACE is modulated by ENSO and PDO on a global scale Heightened North Atlantic hurricane activity is not unexpected
ISSN:0094-8276
1944-8007
DOI:10.1029/2011GL047711