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Tue, October 3, 2023 | 07:29
Hurricane Ian gets nasty quickly, turbocharged by warm water
Posted : 2022-09-28 14:30
Updated : 2022-09-28 18:24
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This GOES-East GeoCcolor satellite image, taken at 10:10 p.m. EDT on Tuesday and provided by the National Oceanic and Atmospheric Administration (NOAA), shows Hurricane Ian over the Gulf of Mexico. AP-Yonhap
This GOES-East GeoCcolor satellite image, taken at 10:10 p.m. EDT on Tuesday and provided by the National Oceanic and Atmospheric Administration (NOAA), shows Hurricane Ian over the Gulf of Mexico. AP-Yonhap

Hurricane Ian is quickly gaining monstrous strength as it moves over oceans partly heated up by climate change, just like 30 other Atlantic tropical storms since 2017 that became much more powerful in less than a day.

This turbocharging of storms is likely to become even more frequent as the world gets warmer, scientists say.

After getting 67 percent stronger in less than 22 hours from Monday to Tuesday, Ian is bearing down as a likely Category 4 hurricane that threatens to deliver a nightmare storm-surge to the Tampa Bay and southwest Florida regions.

Ian's rapid intensification occurred after it traveled over Caribbean waters that are about 1.8 degrees Fahrenheit (1 degree Celsius) warmer than normal, largely because of climate change. Colorado State University hurricane researcher Phil Klotzbach said the warm water creates ''a lot more rocket fuel for the storm.''

Climate change has other effects. The build up of heat-trapping gases from burning fossil fuels is making storms slower and wetter. It exacerbates deadly storm surges through sea-level rise, worsens freshwater flooding and increases the proportion of monster Category 4 and 5 storms, like Fiona last week, several studies show.

The current hurricane season had been uncharacteristically mild until about a week ago because of dry air in the Atlantic. Yet while storms aren't necessarily more frequent, they are getting nastier because of global warming, experts say.

''In terms of impacts and climate change, yes, this season could be a harbinger of sort of what is to come,'' said University of Albany hurricane scientist Kristen Corbosiero. ''But it's really hard to say that climate change has an impact on any one storm in terms of its formation or its individual intensity.''

The National Hurricane Center defines rapidly intensifying storms as those that gain at least 35 mph in wind speed in less than 24 hours. Sudden changes can cause major problems for forecasters and emergency planners trying to help residents get out of harm's way.

In Ian's case, the meteorological conditions were so obvious that forecasters were warning about it days in advance.

While hurricane seasons fluctuate year-to-year, when looked at over 10-year intervals, there are roughly 25 percent more rapidly intensifying storms in the Atlantic and Eastern Pacific now than 40 years ago, according to an analysis of National Hurricane Center data by The Associated Press. From 2017 to 2021 there have been 30 rapidly intensifying storms in the Atlantic and 32 in the Eastern Pacific.

This GOES-East GeoCcolor satellite image, taken at 10:10 p.m. EDT on Tuesday and provided by the National Oceanic and Atmospheric Administration (NOAA), shows Hurricane Ian over the Gulf of Mexico. AP-Yonhap
Maria Llonch retrieves her belongings from her home damaged by Hurricane Ian in Pinar del Rio, Cuba, Tuesday. AP-Yonhap

''That's a staggering statistic,'' said former National Oceanic and Atmospheric Administration climate and hurricane scientist Jim Kossin, now with the private Climate Service, a risk analysis firm. ''What used to be a very, very rare event obviously has not been rare lately.''

A new yet-to-be-published study in a peer-reviewed journal shows that as hurricanes near the coast ― a danger point for people ― storms are intensifying more quickly than ever before, said Karthik Balaguru, a Pacific Northwest National Lab climate scientist who conducted the study. ''It's more likely because of climate change,'' he said.

As water gets warmer at ever deeper levels, the rapid intensification of tropical storms will only accelerate.

''We're turning up the burner on a stove,'' said Kossin.

More powerful hurricanes hold more moisture, which makes them more explosive in the form of torrential rains and storm surges, experts say.

As if that weren't bad enough, research also shows that storms now tend to move more slowly, allowing them to dump more rain in one place, like 2017's Hurricane Harvey, which devastated parts of Louisiana and Texas.

While Ian is expected to slow near the Florida coast and dump huge amounts of rain it is not expected to be near Harvey's level of more than 50 inches.

As storms intensify more rapidly and more frequently, forecasters and emergency planners are given less time to help communities prepare for the worst.

Jefferson Parish, a region of 430,000 people west of New Orleans, got hit last year by Hurricane Ida. That storm's winds went from 80 mph (130 kilometers per hour) to nearly 140 mph (220 kilometers per hour) in 24 hours, leaving little time to evacuate residents.

''Time in preparing for a storm is your complete ally,'' said Joseph Valiente, the director of emergency management for Jefferson Parish.

Evacuating people ahead of big storms helps relieve the strain on city services, which ultimately helps a city recover faster, Valiente said. (AP)




 
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