In an interview on PBS, Landsea said "we certainly see substantial warming in the ocean and atmosphere over the last several decades on the order of a degree Fahrenheit and I have no doubt a portion of that, at least, is due to greenhouse warming. The question is whether we're seeing any real increases in the hurricane activity." He went on to say "with the Atlantic hurricanes in particular, they're due to changes both in the ocean as well as the atmosphere. Just changing the ocean where it's a little bit warmer isn't sufficient." As for climate change affecting hurricane strength, Landsea said that global warming theories and numerical modeling suggest only that "hurricanes like Katrina and Rita may have been stronger due to global warming but maybe by one or two miles per hour."