MIAMI (CBSMiami/CNN) – The 2010 BP oil spill in the Gulf of Mexico was far bigger than originally estimated, according to the results of a new study.

The spill, considered one of the worst environmental disasters in US history, was triggered by an explosion on the BP-contracted Transocean Ltd. Deepwater Horizon rig that killed 11 workers on board and released approximately 168 million gallons of oil in the Gulf of Mexico.

Claire Paris-Limouzy, a professor of ocean sciences at the University of Miami Rosenstiel School and co-author of the study, said the spill was about 30% larger than estimated. It reached the Texas shore, the Florida Keys, the coast of Tampa and parts of the east coast of Florida, according to the study.

At some point, 88,522 square miles of the Gulf of Mexico were closed to fishing because of the spill, according to a federal report on the oil spill.

A spokesman with BP declined to comment on the study’s findings. When reached by CNN on Wednesday, Transocean Ltd. deferred all comments to BP.

Paris-Limouzy and her colleagues used three-dimensional computer simulations to track the oil. She explained the discrepancy between their results and previous estimates is because of smaller concentrations of oil that are often invisible to satellite imagery.

“When the oil comes to the surface, it comes as a thick layer that you can easily see it with a satellite,” she said.

“You can actually smell it but can’t actually see it,” Paris-Limouzy added, referring to the smaller droplets of oil.

Paris-Limouzy said she hopes their research spreads awareness about the potential magnitude of oil spills and shows that satellite imagery is not enough to analyze such events.

“Satellite imagery it’s great but it’s not enough to fully understand oil spills,” she said.

(©2020 CBS Broadcasting Inc. All Rights Reserved. Cable News Network, Inc., a Time Warner Company, contributed to this report.)

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