Hurricane Intensity Increasing Around Bermuda
New research shows that hurricane maximum wind speeds around Bermuda have “more than doubled on average over the last 60 years due to rising ocean temperatures in the region.”
“Hurricanes intensify by extracting energy from the warm ocean surface via air-sea heat fluxes, so a warmer ocean can lead to more intense hurricanes,” a spokesperson said.
“Improving predictions of wind speeds from hurricanes will help determine the right level of response in advance of the storm and potentially limit the resulting damage in Bermuda.
“Between 1955 and 2019 mean hurricane intensity near Bermuda, measured by the maximum wind speed, increased from 35 to 73mph – equivalent to over 6mph per decade. At the same time sea surface and sub surface temperatures in the region increase by upto 1.1°C, providing the additional energy for hurricanes to intensify.
“The study, published in Environmental Research Letters, also develops a predictor for the intensity of hurricanes moving through the Bermuda area using the average upper ocean temperature in the top 50m layer.”
Samantha Hallam, the lead author of this paper from the University of Southampton and the National Oceanography Centre [NOC], said , “The approach we used could provide a better way to predict Bermuda storm intensity than current theory or operational methods alone. It could also be use elsewhere in the subtropical Atlantic where there is a shallow mixed layer depth, typically north of twenty five degrees north.
“We used hurricane potential intensity theory, locally-based weather balloon soundings, surface and upper ocean observations of conditions in and around hurricanes passing within 100km of Bermuda over the last 65 years [including direct hits and ‘near-miss’ storms].”
Dr Mark Guishard, co-author and Director of the Bermuda Weather Service said “the research demonstrates the greater relevance of upper ocean heat versus sea surface temperatures alone in the prediction of hurricane intensity.
“Preliminary testing with the recent passage of Hurricane Paulette shows promising results that this technique could be further developed into an additional operational tool for forecasters locally.”
These findings are the result of a statistical analysis on hurricane paths within 100km of Bermuda, between 1955 and 2019. The research used surface and subsurface ocean temperature observations from the Bermuda Atlantic Times Series [BATS] Hydrostation S programme, managed by the Bermuda Institute of Ocean Sciences.
This research was funded by the Natural Environmental Research Council [NERC] and Bermuda Institute of Ocean Sciences, and involved a collaboration between the University of Southampton, the National Oceanography Centre, the Bermuda Institute of Ocean Sciences and the Met Office.
We need to declare Climate Change a National Emergency and we need an urgent plan for a transition away from fossil fuels at the National level. This is long overdue and the Government needs to tackle this IMMEDIATELY. We are already seeing the devastating effects of losing our coastline and our beaches and we do not even have a roadmap forwards for our country!
It is not just us, Kathy. For the last 4 years the American President denied that any climate change was taking place and the United States withdrew from the Paris Accord.
On a brighter note, with air travel all but non-existent, we are producing a lot less CO2 these days.
“These findings are the result of a statistical analysis on hurricane paths within 100km of Bermuda, between 1955 and 2019.”
Umm, I am sorry to introduce historical context into a scientific paper but it does not appear that anyone has take account of the fact that Bermuda did not experience a hurricane between 1961 and 1987.
Actually , hurricane Arlene hit in 1963 so your date of ’61 needs revising.
Not true.
https://en.wikipedia.org/wiki/List_of_Bermuda_hurricanes