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        Killer Hurricanes | Hurricane Frequency Over Time

        Find out what scientists are learning about the relationship between sea surface temperature and the frequency of powerful North Atlantic hurricanes in this video from NOVA: Killer Hurricanes. By measuring the relative concentrations of two different oxygen isotopes present in the annual growth layers of fossil corals, scientists can discern relative near-surface ocean temperatures over thousands of years. Looking over the past 1,400 years, scientists have determined that the North Atlantic was generally warmer and had more major hurricanes in the first 700 years than in the more recent 700 years. Identifying trends like this can help scientists predict hurricane activity in the future. This resource is part of the NOVA Collection.

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