Atlantic hurricanes and climate over the past 1,500 years.
Atlantic tropical cyclone activity, as measured by annual storm counts, reached anomalous levels over the past decade. The short nature of the historical record and potential issues with its reliability in earlier decades, however, has prompted an ongoing debate regarding the reality and significance of the recent rise. Here we place recent activity in a longer-term context by comparing two independent estimates of tropical cyclone activity over the past 1,500 years. The first estimate is based on a composite of regional sedimentary evidence of landfalling hurricanes, while the second estimate uses a previously published statistical model of Atlantic tropical cyclone activity driven by proxy reconstructions of past climate changes. Both approaches yield consistent evidence of a peak in Atlantic tropical cyclone activity during medieval times (around ad 1000) followed by a subsequent lull in activity. The statistical model indicates that the medieval peak, which rivals or even exceeds (within uncertainties) recent levels of activity, results from the reinforcing effects of La-Niña-like climate conditions and relative tropical Atlantic warmth.
Mann
Michael E
ME
Department of Meteorology and Earth and Environmental Systems Institute, Pennsylvania State University, University Park, Pennsylvania 16802, USA. mann@psu.edu
Woodruff
Jonathan D
JD
Donnelly
Jeffrey P
JP
Zhang
Zhihua
Z
Nature. 2007 May 24;447(7143):465-8
17522681
Science. 1996 Nov 29;274(5292):1504-8
8929406
Nature. 2008 Feb 21;451(7181):E5; discussion E6
18288135
Nature. 2007 Jun 7;447(7145):698-701
17554304
Nature. 2003 Jul 17;424(6946):271-6
12867972
Philos Trans A Math Phys Eng Sci. 2007 Nov 15;365(1860):2695-716
17666389