Metadata last updated on Jun 18, 2026

This dataset includes an estimate of tropical cyclone frequency of Saffir-Simpson category 5. It is based on two sources:

·      IBTrACS v02r01 (1969 - 2008, http://www.ncdc.noaa.gov/oa/ibtracs/), year 2009 completed by online data from JMA, JTWC, UNISYS, Meteo France and data sent by Alan Sharp from the Australian Bureau of Meteorology.

·      A GIS modeling based on an initial equation from Greg Holland, which was further modified to take into consideration the movement of the cyclones through time.

Unit is expected average number of event per 100 years multiplied by 100. This product was designed by UNEP/GRID-Geneva for the Global Assessment Report on Risk Reduction (GAR). It was modeled using global data.

Tropical cyclone frequency
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License: Creative Commons Attribution 4.0
This dataset is licensed under Creative Commons Attribution 4.0
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