Professor Byrne said the state would face problems in terms of its dependence on off-shore sources for oil and fuel.
"Nor do we have large-scale manufacturing for things like clothing production or automobile manufacturing."
He also warns that Tasmania could not cope with a large influx of people.
"Instead of 2,000 people a year showing up here, if we had 20,000 or 30,000 or 200,000 people showing up, there's no way we could meet their needs."
"We just don't have the housing stock available to meet a sudden mass of population increase."
Professor Byrne said there is no data on how many people move to Tasmania each year fearing the impact of future climate change scenarios.
"There's no doubt in my mind that we're seeing the edge of this effect right now.
"That's why I'm here."
Professor Byrne moved to Tasmania with his family from the Gold Coast in 2018.
"I've worked in the field of climate change adaptation for quite a while now and have become increasingly concerned about what the global models are telling us … about the intensity and scale of the change that's happening," he said.
"When the opportunity came to move down here to Tasmania, it was a no-brainer." Mainlanders already moving south
A woman in her 50s who asked not to be named told the ABC she moved from Perth to Tasmania in 2015 because she and her husband were fearful about the impacts of climate change.
"It was just getting extremely hot for many weeks of the year and so it's fine when you're in your air-conditioned house but then of course you need to leave.
"It really literally is like being punched in the face … the heat is just oppressive."
"It's happening faster than the modelling is predicting."
The couple now live on five acres in Tasmania's south and are looking to ensure they are self-sufficient when it comes to food, water and energy.
"People sort of think it's pretty extreme but … more and more people are coming to that realisation about how urgent it really is." Top of the list if SHTF
The Real Estate Institute of Tasmania's (REIT) president, Mandy Welling, said she was seeing a rising number of interstate buyers choosing to move to Tasmania.
"In the last 90 days, we've had an increase of about 10 per cent [interstate buyers]," Ms Welling said.
She said climate change is not the only reason Australians are heading south.
"Many of those are telling us that the reason they are doing that is to escape COVID."
"They see our government has made hard and fast decisions and been able to protect Tasmanians."
On the extreme end of people preparing for a societal collapse, a Facebook group of doomsday preppers discussed preferred Australian destinations should the SHTF (shit hit the fan).
Tasmania attracted a number of opinions.
"End of the earth, small population."
"Has handled COVID well, Tassie can easily shut the borders."
"Beautiful but cold."
"Too corrupt and too close to Antarctica, where all sorts of crazy happens."
"Harsh winters that can make growing harder but not impossible."
"Plenty of tiger snakes."