September 2017 record-setting month for hurricanes


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A satellite image of Hurricane Maria. (Sturart Rankin/flickr)
Jenna Ladd | October 4, 2017

September 2017 was a record-setting calendar month for hurricane activity in the Atlantic ocean.

The beginning of September brought Hurricane Harvey, a category four storm which caused unprecedented damage to the U.S.’s fourth largest city, Houston. Five additional hurricanes left paths destruction across the Caribbean and Florida later in September, with Irma and Maria both reaching category five status.

It is common for September to be the most active month for hurricanes because low pressure systems often move across the Atlantic from Africa and meet the tropical waters of the Caribbean at this time, but September 2017 was a cut above the rest. According to Phil Klotzbach of Colorado State University, September 2017 featured 18 “major hurricane days,” beating 1961’s record of 17.25 “major hurricane days.” Last month, the overall intensity and duration of storms, known as “accumulated cyclone energy,” was 175 units, significantly higher than September 2014’s record of 155 units.

While climate change has not been found to cause hurricanes, there is evidence to say that rising sea temperatures cause hurricanes to be more intense.

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