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Annual Global Climate and Catastrophe Report: Impact ... - Aon

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AnnuAl GlobAl Cli mAte And C AtAstroph e r e port<br />

2009 Indian Ocean <strong>and</strong> Southern Pacific Cyclone Season Review<br />

Figure 10: Indian Ocean & South Pacific Cyclones Over The Last 25 Years<br />

Cyclones<br />

The downward trend of tropical system frequency continued in 2009 across the northern <strong>and</strong> southern Indian<br />

Ocean <strong>and</strong> the southern Pacific Ocean. A total of 29 named storms developed in the region, 13 percent below<br />

the 25-year average of 33.5. Of those storms, eight cyclones formed – 49 percent below the 25-year average of<br />

15.8. Only five of the eight cyclones reached Category 3 or higher – 34 percent below the 25-year average of<br />

7.6. Of the eight cyclones, three made l<strong>and</strong>fall – 38 percent below the 25-year average of 4.8.<br />

Most of the storms that developed in the southern Pacific Ocean stayed offshore <strong>and</strong> only achieved tropical<br />

storm status. However, one storm, Cyclone Hamish, reached a peak intensity of 240 kph (150 mph) while it<br />

remained just off the queensl<strong>and</strong> coastline. The system developed on March 5th <strong>and</strong> dissipated by March 12th.<br />

The southern Indian Ocean was more active, producing seven cyclones, of which five achieved at least<br />

Category 3 strength. Only one of these storms, Cyclone Fanele, made l<strong>and</strong>fall in Madagascar. The system<br />

developed on January 19th <strong>and</strong> dissipated by January 22nd. Cyclone Gael approached the eastern coast of<br />

Madagascar in early February with peak winds of 220 kph (140 mph), though it turned to the south <strong>and</strong><br />

southeast right before it made l<strong>and</strong>fall.<br />

The northern Indian Ocean was very quiet, with only three tropical storms <strong>and</strong> one cyclone. The cyclone,<br />

named Aila, developed on May 24th <strong>and</strong> dissipated by May 25th with peak winds of 120 kph (75 mph). Aila<br />

made l<strong>and</strong>fall during its peak intensity <strong>and</strong> caused damage to India <strong>and</strong> Bangladesh.<br />

12<br />

30<br />

25<br />

20<br />

15<br />

10<br />

5<br />

0<br />

1985<br />

1986<br />

1987<br />

1988<br />

1989<br />

1990<br />

1991<br />

1992<br />

1993<br />

1994<br />

1995<br />

1996<br />

1997<br />

Year<br />

1998<br />

1999<br />

2000<br />

Normal = 15.8<br />

Indian Ocean & South Pacific Cyclones<br />

2001<br />

2002<br />

2003<br />

2004<br />

2005<br />

2006<br />

2007<br />

2008<br />

2009

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