1. Schott, T. et al. The Saffir-Simpson hurricane wind scale. National Weather Services, National Hurricane Centre, National Oceanic and Atmospheric Administration (NOAA) factsheet. http://www.nhc.noaa.gov/pdf/sshws.pdf (2012).
2. Dvorak, V. F. Tropical cyclone intensity analysis and forecasting from satellite imagery. Mon. Weather Rev. 103, 420–430 (1975).
3. Dvorak, V. F. Tropical cyclone intensity analysis using satellite data (US Department of Commerce, National Oceanic and Atmospheric Administration, National Environmental Satellite, Data, and Information Service, 1984).
4. Atkinson, G. D. & Holliday, C. R. Tropical cyclone minimum sea level pressure/maximum sustained wind relationship for the western north pacific. Mon. Weather Rev. 105, 421–427 (1977).
5. Koba, H., Hagiwara, T., Osano, S. & Akashi, S. Relationship between the CI-number and central pressure and maximum wind speed in typhoons. J. Meteor. Res. 42, 59–67 (1990).