We’ve known this for quite some time, but I wanted to offer my congratulations to Dr. Maue. I’m thankful that you are a WUWT contributor. – Anthony

AGU journal highlights — Aug. 18

The following highlights summarize research papers that have been recently published in Geophysical Research Letters (GRL), Journal of Geophysical Research-Earth Surface (JGR-F), Journal of Geophysical Research-Biogeosciences (JGR-G), and Journal of Geophysical Research-Oceans (JGR-C).

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2. Global cyclone activity historically low

A new research study shows that overall global tropical cyclone activity has decreased to historically low levels during the past 5 years.

Maue analyzes global tropical cyclone data from 1970 through May 2011 to examine the considerable interannual variability of the accumulated cyclone energy (ACE) metric. Since 2006, global and Northern Hemisphere ACE have decreased significantly, reaching the lowest levels since the late 1970s. Also, during 2010-2011, the overall global frequency of tropical cyclones reached a historical low. The researcher demonstrates that much of the variability in tropical cyclone energy during the past 40 years is clearly associated with natural large-scale climate oscillations such as the El Niño-Southern Oscillation and the Pacific Decadal Oscillation.

Source:

Geophysical Research Letters, doi:10.1029/2011GL047711, 2011

http://dx.doi.org/10.1029/2011GL047711

Title: Recent historically low global tropical cyclone activity

Author: Ryan N. Maue: Center for Ocean and Atmosphere Studies, Department of Earth, Ocean and Atmospheric Science, Florida State University, Tallahassee, Florida, USA;

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